Expanding type breathing apparatus

A kind of expandable respirator technical field

[0001] The present invention relates to an expandable respirator, in particular to a connection structure between an oxygen cylinder and a back frame of the expandable respirator.

Background technique

[0002] Air expansion respirator is a breathing device used by rescuers to prevent inhalation of harmful substances or use in an oxygen-deficient environment during fire fighting or rescue. The air expansion respirator will be equipped with oxygen cylinders for rescuers to normal Breathing. At present, the structure of a general air-expanding respirator includes oxygen cylinders, connecting belts, straps, back frames, vent pipes, and masks. The back frames connect and fasten the oxygen cylinders through the connection belts. The back straps are generally installed on both sides of the back frame. For the harness, one end of the snorkel is connected with the oxygen cylinder, and the other end of the snorkel is connected with the mask. In the above structure, the installation of the back frame and the oxygen cylinder through the connecting belt may sometimes be unstable, causing the oxygen cylinder to shake significantly. It may even detach, which poses a safety hazard in use. In addition, the distance between the strap and the back frame is not adjustable, and the best and comfortable position cannot be adjusted according to different users. At the same time, the appropriate distance between the straps cannot be adjusted according to the shoulder width of different people.

Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the problem solved by the present invention is to provide an expansion type that can adjust the distance between the straps according to the shoulder width, the distance between the straps and the back frame, and the back frame and the oxygen cylinder are firmly connected. Respirator.

[0004] In order to solve the above problems, the technical solutions adopted by the present invention are as follows: An expandable respirator, including an oxygen cylinder, a back frame, a vent tube, a back strap, a rotating buckle structure, a longitudinal adjustment mechanism, a telescopic rod, and an expansion elastic body The upper end of the oxygen cylinder is connected to a vent pipe; the rotary snap structure includes a connecting plate, a sliding rotary block, a locking rod, a telescopic column, a squeeze spring, and a positioning member; the connecting plate is installed on the oxygen cylinder The middle of the outer side of the connecting plate is installed with a sliding rotating block; the upper end of the sliding rotating block is installed with a locking rod; the middle of the outer side of the back frame is provided with a sliding slot from top to bottom; the The upper end of the sliding card slot extends to the edge of the upper end of the back frame, and the lower end extends to the bottom of the middle of the back frame; the outer side of the sliding card slot of the back frame is provided with an insertion hole; the inner bottom side of the sliding card slot A locking groove is provided in communication with the bottom; a positioning member is installed at the bottom of the locking groove; the sliding rotating block on the outside of the connecting plate is slidably inserted from the upper end of the sliding slot of the back frame, and the sliding rotating block is slidably inserted into the sliding card The lower end of the groove; one side of the sliding rotary block of the connecting plate is provided with a connecting groove; an extrusion spring is installed in the connecting groove; a telescopic column is inserted into the connecting groove; the extrusion spring It is elastically squeezed on the inner end of the telescopic column; the outer end of the telescopic column extends to the outside of the connecting groove and abuts on the other side of the outer side of the sliding slot of the back frame; the sliding rotating block is sliding The lower end of the card slot rotates 180 degrees and drives the connecting plate and the locking lever to rotate; the connecting plate drives the telescopic column to abut and slide from the other side of the sliding card slot of the back frame to the sliding card slot of the back frame. On the outer side, the telescopic column is inserted into the insertion hole on the outer side of the sliding slot of the back frame through the squeeze of the squeeze spring; the locking rod is directed from the upper end of the sliding rotary block to Rotate downwards, after passing through the lock slot, the lock is connected to the positioning member at the bottom of the lock slot; the longitudinal adjustment mechanism includes a positioning plate, a sliding plate, and an adjusting screw; both ends of the back frame are respectively installed with a positioning plate One side of the positioning plate is equipped with a telescopic rod; both sides of the back frame are respectively provided with expansion grooves; the positioning plate is slidably clamped in the expansion groove of the back plate through a telescopic rod on one side; The end of the telescopic rod is provided with a drive plate; the drive plate slides

In the expansion groove; the expansion elastic body is sleeved on the telescopic rod and is located inside the expansion groove; the two ends of the expansion elastic body are elastically squeezed between the inner wall of the expansion groove and the drive plate; The outer end and the inner end of the positioning plate are respectively provided with an adjusting groove and a floating groove; a threaded channel is provided between the adjusting groove and the floating groove; a sliding plate is slidably installed in the floating groove; One end of the sliding plate is slidably inserted into the floating groove, and the other end of the sliding plate extends to the outside of the floating groove; the threaded channel is respectively threaded with an adjusting screw; the outer end of the adjusting screw is located in the adjusting groove , The inner end is located in the floating groove; the inner end of the adjusting screw is rotated and clamped with one end of the sliding plate; the other end of the sliding plate is respectively connected with a strap.

[0005] Further, the outer end of the connecting groove of the connecting plate is provided with a ring-shaped limiting tooth; the middle and outer sides of the telescopic column are provided with a ring-shaped telescopic groove; The groove is slidably clamped on the annular limiting tooth of the connecting groove.

[0006] Further, the depth of the locking groove is less than the depth of the sliding slot.

[0007] Further, the cross section of the sliding slot and the sliding rotating block are both T-shaped structures; the sliding rotating block is a stepped cylinder.

[0008] Further, the locking rod is in an L-shaped structure; the positioning member is in an inverted U-shaped structure; the outer end of the locking rod is rotatably locked on the positioning member.

[0009] Further, the outer end surface of the telescopic column is provided with a wear-resistant coating; the wear-resistant coating is made of polytetrafluoroethylene.

[0010] Further, it also includes an isolation layer; the isolation layer is installed between the sliding plates; the isolation layer is made of elastic soft material.

[0011] Further, the back frame is a U-shaped structure; the back frame is made of plastic material.

[0012] The beneficial effects of the present invention

1. The positioning plate of the present invention is slidably clamped into the expansion groove of the back plate through a telescopic rod on one side, the expansion elastic body is sleeved on the expansion rod and is located inside the expansion groove, and the two ends of the expansion elastic body are elastically squeezed in Between the inner wall of the expansion groove and the drive plate, the drive plate is squeezed to the middle through the expansion elastic body, thereby driving the telescopic rod and the positioning plate to move in the middle. According to different shoulder widths, the positioning plate and the telescopic rod can be stretched to the outside , So as to adapt to different shoulder widths; the present invention increases the structure of the adjustable distance between the strap and the back frame, and adds a longitudinal adjustment mechanism. The adjustment screw is controlled by rotating in the adjustment slot of the positioning plate, so that the adjustment screw is rotated and moved The sliding plate can be driven to telescopically move in the floating groove of the positioning plate, thereby changing the moving distance of the sliding plate in the floating groove, thereby changing the distribution distance between the strap and the back frame, so as to achieve the best use effect.

[0013] 2. The present invention changes the connection between the traditional oxygen cylinder and the back frame, and improves the stability and installation efficiency of the connection; the present invention achieves a triple connection structure to ensure stability. First, the present invention is in the middle of the outer side of the back frame. There is a sliding slot from top to bottom, a sliding rotating block is installed in the middle of the outer side of the connecting plate, and the sliding rotating block on the outside of the connecting plate is slidingly inserted from the upper end of the sliding slot of the back frame, and the sliding rotating block is slidably inserted into the sliding slot The lower end of the, thus forming the first sliding clip; then the sliding rotary block is rotated 180 degrees inside the lower end of the sliding slot and the connecting plate is driven to rotate, and the connecting plate drives the telescopic column from the sliding slot of the back frame The other side abuts and slides to one side of the sliding slot of the back frame, and at the same time, the locking lever rotates downward from the upper end of the sliding rotating block to the bottom of the locking slot, thus forming the second rotation direction; and finally; , The telescopic column is inserted into the insertion hole on the side of the sliding slot of the back frame through the squeezing of the squeeze spring, and the outer end of the locking lever is locked to the positioning member at the bottom of the locking slot, so The formation of the third level of insertion and clamping positioning, which greatly improves the stability of the oxygen cylinder and the back frame; and the entire installation process is a sliding and rotating

The process, installation is quick and convenient.

[0014] 3. The present invention uses a 180-degree rotation to transform the two forms of locking methods. First, the sliding connection between the sliding rotary block of the connecting plate and the sliding slot of the back frame occurs at 180-degree rotation. Previously, the insertion of the telescopic column and the insertion hole and the locking of the locking rod and the positioning member occurred after a 180-degree rotation. The rotation separated the two front and rear connection forms, which greatly increased the structure. Resistance to multiple deformation, so even when the telescopic column is inserted into the plug hole and the lock lever is separated from the lock of the positioning member, it must be rotated by 180 degrees after the sliding rotary block of the connecting plate and the back frame The sliding slot can be slid and separated, so the structure of the present invention is more stable.

[0015] 4. The present invention is provided with an insertion hole on the outer side of the sliding slot of the back frame, one side of the sliding rotary block of the connecting plate is provided with a connecting groove, and the outer end of the telescopic column of the present invention extends to the connecting groove The outer side of the back frame abuts on the other side of the sliding slot of the back frame, so that the insertion holes on the back frame and the telescopic posts on the connecting plate are distributed on both sides, so that the same can be achieved when the connecting plate rotates. Correspondence on the side to realize the connection.

Description of the drawings

[0016] FIG. 1 is a schematic top view of the structure of the present invention.

[0017] FIG. 2 is a schematic cross-sectional view of the back frame.

[0018] FIG. 3 is a schematic structural view of the sliding rotary block just inserted into the sliding slot of the back frame.

[0019] FIG. 4 is a schematic structural view of the sliding rotation block rotating inside the lower end of the sliding slot of the back frame.

[0020] FIG. 5 is a schematic structural view of the sliding rotary block after being rotated 180 degrees inside the lower end of the sliding slot of the back frame.

[0021] FIG. 6 is a schematic side view of the connecting rod and the back plate.

[0022] FIG. 7 is a schematic side view of the structure of the connecting rod and the back plate after rotating 180 in FIG. 6.

[0023] FIG. 8 is an enlarged schematic diagram of A in FIG. 6.

[0024] FIG. 9 is an enlarged schematic view of B in FIG. 7.

[0025] FIG. 10 is a schematic side view of the sliding rotary block just inserted into the sliding slot of the back frame.

[0026] FIG. 11 is a schematic side view of the sliding slot of the sliding rotary block and the back frame after rotating 180.

[0027] FIG. 12 is a schematic diagram of a partial enlarged structure of the longitudinal adjustment mechanism of the present invention.

Detailed ways

[0028] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] As shown in Figures 1 to 12, an expandable respirator includes an oxygen cylinder 1, a back frame 2, a vent tube 4, a strap 3, a rotating buckle structure 5, a longitudinal adjustment mechanism 7, a telescopic rod 8, and an expansion Elastic body 9. The upper end of the oxygen cylinder 1 is connected to the vent pipe 4; the rotating buckle structure 5 includes a connecting plate 51, a sliding rotating block 52, a locking rod 55, a telescopic column 54, a compression spring 53, and a positioning member 56; The connecting plate 51 is installed on one side of the oxygen cylinder 1; the outer side of the connecting plate 51 is installed with a sliding rotating block 52 in the middle; the upper end of the sliding rotating block 52 is installed with a locking rod 55; the back frame 2 The outer middle of the outer side is provided with a sliding slot 21 from top to bottom; the upper end of the sliding slot 21 extends to the upper edge of the back frame, and the lower end extends to the bottom of the middle of the back frame; the outer part of the sliding slot 21 of the back frame 2 One side is provided with an insertion hole 23; the lower inner side of the sliding slot 21 and the bottom are connected with a locking groove 22; the bottom of the locking groove 22 is equipped with a positioning member 56; the connecting plate The sliding and rotating block 52 on the outside of 51 is slid and inserted from the upper end of the sliding slot 21 of the back frame 2, and the sliding and rotating block 52 is slidably inserted into the lower end of the sliding slot 21; one side of the sliding and rotating block 52 of the connecting plate 51 is provided The connection groove 511; the connection groove 511 is installed with an extrusion spring 53; the connection groove 511 is inserted and connected to a telescopic column 54; the compression spring 53 is elastically squeezed on the telescopic column 54

The inner end; the outer end of the telescopic column 54 extends to the outside of the connecting groove 511 and abuts on the other side of the outer side of the sliding slot 21 of the back frame 2; the sliding rotating block 52 is in the sliding slot 21 The inside of the lower end rotates 180 degrees and drives the connecting plate 51 and the locking rod 55 to rotate; the connecting plate 51 drives the telescopic column 54 to abut and rotate to slide from the outside of the sliding slot 21 of the back frame 2 to the back frame 2 On the outer side of the sliding slot 21, the telescopic column 54 is inserted into the insertion hole 23 on the outer side of the sliding slot of the back frame 2 through the squeeze of the squeeze spring 53; the lock The buckle rod 55 rotates downward from the upper end of the sliding and rotating block 52, and after passing through the locking groove 22, the buckle is connected to the positioning member 56 at the bottom of the locking groove 22. The longitudinal adjustment mechanism 7 includes a positioning plate 71, a sliding plate 72, and an adjusting screw 73; a positioning plate 71 is installed at both ends of the back frame 2; a telescopic rod 8 is installed on one side of the positioning plate 71; Expansion grooves 28 are provided on both sides of the back frame 2; the positioning plate 71 is slidably clamped in the expansion groove 28 of the back plate 2 through a telescopic rod 8 on one side; the end of the telescopic rod 8 The section is provided with a drive plate 81; the drive plate 81 is slidably clamped in the expansion groove 28, and the cross section of the drive plate 81 and the expansion groove 28 can be rectangular; the expansion elastic body 9 is sleeved on the telescopic rod 8. And is located inside the expansion groove 28; the two ends of the expansion elastic body 9 are elastic Squeezed between the inner wall of the expansion groove 28 and the drive plate 81; the outer end and the inner end of the positioning plate 71 are respectively provided with an adjusting groove 711 and a floating groove 712; between the adjusting groove 711 and the floating groove 712 A threaded channel 713 is provided; a sliding plate 72 is slidably installed in the floating groove 712; one end of the sliding plate 72 is slidably inserted into the floating groove 712, and the other end of the sliding plate 72 extends to the floating groove 712 The outer side of the threaded channel 713 is respectively threaded to install an adjusting screw 73; the outer end of the adjusting screw 73 is located in the adjusting groove 711, and the inner end is located in the floating groove 712; the inner end of the adjusting screw 73 and One end of the sliding plate 72 is rotatably clamped; the other end of the sliding plate 72 is connected to a strap 3 respectively.

[0030] As shown in FIGS. 1 to 11, it is further preferred that the outer end of the connecting groove 511 of the connecting plate 51 is provided with a ring-shaped limiting tooth 512; the middle and outer sides of the telescopic column 54 are provided with a ring-shaped telescopic groove 541; The telescopic column 54 is slidably clamped on the annular limiting tooth 512 of the connecting groove 511 through the annular telescopic groove 541 on the outer side of the middle circumference. Further, the depth of the locking groove 22 is smaller than the depth of the sliding groove 21, as shown in FIG. 10, so that the sliding rotary block 52 does not fall into the locking groove 22. Further, the cross section of the sliding slot 21 and the sliding rotating block 52 are both T-shaped structures; the sliding rotating block 52 is a stepped cylinder, and the lower end of the sliding slot 21 can be semi-circular in order to fit into the sliding slot 21. structure. Furthermore, the locking rod 55 has an L-shaped structure; the positioning member 56 has an inverted U-shaped structure; the outer end of the locking rod 55 is rotatably locked on the positioning member 56. Further, the outer end surface of the telescopic column 54 is provided with a wear-resistant coating 541; the wear-resistant coating 541 is made of polytetrafluoroethylene. Further, it also includes an isolation layer 6; the isolation layer 6 is installed between the sliding plates; the isolation layer 6 is made of elastic soft material. The back frame 2 has a U-shaped structure; the back frame 2 is made of plastic material.

[0031] The present invention adds a structure in which the distance between the strap 3 and the back frame 2 can be adjusted, and a longitudinal adjustment mechanism 7 is added. The adjustment screw 73 is controlled by rotating in the adjustment groove 711 of the positioning plate 71, so that the adjustment screw 73 moves in rotation The sliding plate 72 can be driven to telescopically move in the floating groove 712 of the positioning plate 71 at time, thereby changing the moving distance of the sliding plate 72 in the floating groove 712, thereby changing the distribution distance between the strap 3 and the back frame 2, so as to achieve the best Effect.

[0032] The present invention changes the connection method of the traditional oxygen cylinder 1 and the back frame 2 to improve the stability and installation efficiency of the connection; the present invention realizes a triple connection structure to ensure stability. First, the present invention is on the outside of the back frame 2. A sliding slot 21 is provided in the middle from top to bottom, a sliding rotating block 52 is installed in the middle of the outer side of the connecting plate 51, and slidingly inserted from the upper end of the sliding slot 21 of the back frame 2 through the sliding rotating block 52 outside the connecting plate 51, and The sliding rotary block 52 is slidably inserted into the lower end of the sliding card slot 21, thus forming the first heavy sliding clip; then the sliding rotary block 52 is rotated 180 degrees inside the lower end of the sliding card slot 21 and drives the connecting plate 51 and oxygen The bottle 1 rotates, and the oxygen bottle 1 is actually upside down before it rotates. The connecting plate 51 drives the telescopic column 54 to abut and rotate to slide from the other side of the sliding groove 21 of the back frame 2 to one of the sliding groove 21 of the back frame 2. At the same time, the locking lever 55 rotates downward from the upper end of the sliding rotary block 52 to reach the bottom of the locking groove 22, thus forming a second rotation

Finally, the telescopic column 54 is inserted into the insertion hole 23 on the side of the sliding slot 21 of the back frame 2 by the squeeze of the squeeze spring 53, while the outer end of the locking lever 55 is locked in On the positioning member 56 at the bottom of the locking groove 22, the third insertion and clamping positioning is formed, which greatly improves the connection stability of the oxygen cylinder 1 and the back frame 2; and the entire installation process is a sliding and The rotation process is quick and convenient to install. It can be seen from Figures 6 and 7 that the oxygen cylinder 1 is inserted upside down on the back plate 2 at the beginning, and then rotated 180 and then snapped and locked; Figures 3 to 5 can be seen The whole process of rotation. [0033] The present invention uses a 180-degree rotation to transform the two forms of locking methods. First, the sliding connection between the sliding rotary block 52 of the connecting plate 51 and the sliding slot 21 of the back frame 2 occurs at 180 degrees. Before the rotation, the insertion of the telescopic column 54 and the insertion hole 23 and the locking of the locking rod 55 and the positioning member 56 all occur after a 180-degree rotation. The rotation separates the two front and rear connection modes. It greatly increases the resistance to multiple deformations of the structure, so even if the telescopic column 54 is inserted into the insertion hole 23 and the lock lever 55 and the lock of the positioning member 56 are disengaged, they must be connected after a 180-degree rotation. Only the sliding and rotating block 52 of the plate 51 can be slidably separated from the sliding slot 21 of the back frame 2, so the structure of the present invention is more stable.

[0034] The present invention is provided with an insertion hole 23 on the outer side of the sliding slot 21 of the back frame 2, and a connecting groove 511 is provided on one side of the sliding rotary block 52 of the connecting plate 51, and the outer side of the telescopic column 54 of the present invention The end extends to the outside of the connecting groove 511 and abuts on the other side of the sliding slot 21 of the back frame 2, so that the insertion hole 23 on the back frame 2 and the telescopic column 54 on the connecting plate 51 are distributed on both sides In this way, when the connecting plate 51 rotates, the correspondence on the same side is realized, and the connection is realized.

[0035] The foregoing descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in Within the protection scope of the present invention.