Respirator

A kind of respirator technical field

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

Background technique

[0002] An air 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 respirator will be equipped with oxygen cylinders for the rescuers to breathe normally. The structure of the air breathing apparatus includes oxygen cylinders, connecting straps, straps, back frames, vent pipes, and masks. The back frames connect and fasten the oxygen cylinders through the connection straps. The straps are generally installed on both sides of the back frame for the back straps. It is connected to the oxygen cylinder, and the other end of the vent pipe is connected to 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 a lot. Safety hazards.

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 a respirator with a stable connection between a back frame and an oxygen cylinder.

[0004] In order to solve the above-mentioned problems, the technical solutions adopted by the present invention are as follows: A respirator, including an oxygen cylinder, a back frame, a vent tube, a back strap, and a rotating buckle structure; both ends of the inner side of the back frame are respectively installed with a back strap 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 upper edge 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 a plug hole; the inner side of the sliding card slot is lower 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 in the sliding slot The lower end of the interior is made 18 Rotate at 0 degrees and drive the connecting plate and the lock lever to rotate; the connecting plate drives the telescopic column to abut and slide from the other side of the sliding slot of the back frame to the outer side of the sliding slot of the back frame. The telescopic column is inserted into the insertion hole on the outer side of the sliding slot of the back frame by the squeeze of the squeeze spring; the lock lever rotates downward from the upper end of the sliding rotary block and passes through the lock The rear lock catch is connected to the positioning member at the bottom of the lock catch groove.

[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 rotary block are both T-shaped structures; the sliding rotary 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 in the middle of the inner side of the back frame; 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 present invention changes the connection method of the traditional oxygen cylinder and the back frame, and improves the stability of the connection and the installation efficiency; the present invention realizes the triple connection structure and ensures the stability. First, the present invention starts from the top in the middle of the outer side of the back frame. There is a sliding slot underneath. A sliding rotating block is installed in the middle of the outer side of the connecting plate. 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 lower end of the sliding slot In this way, the first sliding clip is formed; then the sliding rotating 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 to press against the other side of the sliding slot of the back frame. Rotate and slide to the side of the sliding slot of the back frame, and at the same time, the lock lever rotates downward from the upper end of the sliding rotating block to the bottom of the lock slot, thus forming the second rotation direction; finally, the telescopic column passes The extrusion of the squeeze spring pushes and inserts into the insertion hole on the side of the sliding slot of the back frame, and at the same time, the outer end of the lock lever is locked to the positioning member at the bottom of the lock slot, thus forming the third layer The insertion and snap-fit positioning greatly improves the connection stability of the oxygen cylinder and the back frame; and the entire installation process is a sliding and rotating process, which is quick and convenient.

[0013] 2. 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. The resistance to multiple deformation, so even when the telescopic column and the insertion hole are inserted and the locking rod and the locking buckle of the positioning member are detached, the sliding rotary block of the connecting plate and the back frame must be rotated after 180 degrees The sliding slot can be slid and separated, so the structure of the present invention is more stable.

[0014] 3. The present invention is provided with an insertion hole on the outer side of the sliding slot of the back frame, a connecting groove is provided on one side of the sliding rotary block of the connecting plate, 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

[0015] FIG. 1 is a schematic top view of the structure of the present invention.

[0016] FIG. 2 is a schematic cross-sectional view of the back frame.

[0017] FIG. 3 is a schematic structural view of the sliding rotating block just inserted into the sliding slot of the back frame.

[0018] 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.

[0019] 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.

[0020] FIG. 6 is a schematic side view of the connecting rod and the back plate.

[0021] FIG. 7 is a schematic side view of the structure of the connecting rod and the back plate after rotating 180 in FIG. 6. [0022] FIG. 8 is an enlarged schematic view of A in FIG. 6.

[0023] FIG. 9 is a schematic diagram of an enlarged structure of B in FIG. 7.

[0024] FIG. 10 is a schematic side view of the structure of the sliding rotary block just inserted into the sliding slot of the back frame.

[0025] FIG. 11 is a schematic side view of the sliding slot of the sliding rotary block and the back frame after rotating 180.

Detailed ways

[0026] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] As shown in FIGS. 1 to 11, a respirator includes an oxygen cylinder 1, a back frame 2, a vent tube 4, a strap 3, and a rotating buckle structure 5. Both ends of the inner side of the back frame 2 are respectively equipped with a back strap 3; 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, and a locking rod 55 , The telescopic column 54, the compression spring 53, the 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 sliding rotation The upper end of the block 52 is equipped with a locking rod 55; the outer middle of the back frame 2 is provided with a sliding groove 21 from top to bottom; the upper end of the sliding groove 21 extends to the upper edge of the back frame, and the lower end extends to the back frame The lower part of the middle; the outer side of the sliding slot 21 of the back frame 2 is provided with an insertion hole 23; the lower inner side and the bottom of the sliding slot 21 are connected with a locking groove 22; the lock The bottom of the buckle groove 22 is installed with a positioning member 56; the sliding rotary block 52 outside the connecting plate 51 is slidably inserted from the upper end of the sliding slot 21 of the back frame 2, and the sliding rotary 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 with a connecting groove 511; a compression spring 53 is installed in the connecting groove 511; a telescopic column 54 is inserted and connected in the connecting groove 511; The compression spring 53 is elastically squeezed into the telescopic column 54 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 at the lower end of the sliding slot 21 The inside rotates 180 degrees and drives the connecting plate 51 and the lock lever 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 sliding of the back frame 2. On the outer side of the 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 by the squeeze of the squeeze spring 53; the lock lever 55 rotates downward from the upper end of the sliding and rotating block 52, and after passing through the locking groove 22, the locking is connected to the positioning member 56 at the bottom of the locking groove 22.

[0028] 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 sections 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. Further, 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 in the middle of the inner side of the back frame 2; 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.

[0029] 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 achieves 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 rotating block 52 is slidably inserted into the lower end of the sliding card slot 21, thus forming the first sliding card connection; then the sliding rotating block 52 is rotated 180 degrees inside the lower end of the sliding card slot 21 and drives the connecting plate 51 and oxygen Bottle 1 rotates. The oxygen bottle 1 is actually upside down before it rotates. The connecting plate 51 has

CN 111167030 A Description The movable telescopic column 54 abuts on the other side of the sliding slot 21 of the back frame 2 to rotate and slide to one side of the sliding slot 21 of the back frame 2, and at the same time, the locking rod 55 is removed from the sliding block 52 The upper end rotates downward to reach the bottom of the locking groove 22, thus forming the second rotation direction; finally, the telescopic column 54 is pushed and inserted into the sliding groove 21 side of the back frame 2 by the pressing of the squeeze spring 53 At the same time, the outer end of the locking rod 55 is locked to the positioning member 56 at the bottom of the locking groove 22 in the insertion hole 23, so as to form the third insertion and clamping positioning, which greatly improves the oxygen cylinder 1 The stability of the connection with the back frame 2; and the entire installation process is a sliding and rotating process, and the installation is quick and convenient. It can be seen from Figures 6 and 7 that the oxygen cylinder 1 is inserted upside down into the back plate 2 at first, and then After the rotation is 180, the latching and locking is carried out; from Figures 3 to 5, the entire rotation process can be known.

[0030] 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.

[0031] 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.

[0032] 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.