Sensor fixture and sensor fixing structure using the same

The present invention uses, for example, a sensor fixture for fixing a sensor for detecting poor contact of a connector in close contact with an electric wire in a power supply circuit for supplying electric power to an electric motor for driving a wheel of an EV (electric vehicle). Regarding the sensor fixing structure that was there.

Conventionally, in order to fix the sensor 201, which detects the fitting of the connector by detecting the current as described in Patent Document 1, to the electric wire 203, as shown in FIG. 5, the tape 205 is wound around the sensor 201 to connect the sensor 201 to the electric wire. It was fixed to 205, or the sensor 201 was fixed to wire 205 using band 207, as shown in FIG.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 2006-64620</text></patcit></p>

<p> However, the conventional sensor fixing methods using the tape 205 and the band 207 are all manual work, which is troublesome and increases the work cost, and mounting error (detection error by the sensor) is unavoidable for each work location. ..</p><p> Further, since the fixed sensor 201 is not protected from an impact caused by a collision with a peripheral member or the like, it is necessary to take protective measures such as attaching a protective member in order to avoid damage.</p><p> Further, in consideration of the bending of the electric wire 203 that occurs when the sensor 201 is attached to the vehicle body, it is necessary to take measures to prevent the sensor 201 from peeling off from the electric wire 203.</p><p> In addition, space for attaching the tape 205 and the band 207 is required, which is inefficient in space utilization, and the amount of material used and the cost increase by the amount of the tape 205 and the band 207 used.</p><p> Therefore, the present invention makes it possible to easily mount the sensor at low cost, avoids mounting error (detection error), and eliminates the need for means for protecting the sensor from impacts and consideration for bending of electric wires. And the purpose is to provide a sensor fixing structure using this.</p>

<p> The sensor fixture according to claim 1 is a sensor fixture that fixes a sensor that detects the current of the electric wire drawn from the electric wire lead-out portion of the connector and monitors the connection state with the other side connector to the outer peripheral portion of the electric wire. The main holder is composed of a main holder and a side holder, and the main holder is provided integrally with the holder main body mounted on the electric wire lead-out portion side and the holder main body, and the sensor can be brought into contact with the outer peripheral portion of the electric wire. The side holder is attached to the main holder to press the electric wire against the sensor.</p><p> The invention of claim 2 is the sensor fixture according to claim 1, wherein the holder body has a connector insertion portion through which the electric wire lead-out portion of the connector is inserted, and the sensor holding portion is the side. A side holder mounting portion on which the holder is mounted, a sensor accommodating portion accommodating the sensor, and an electric wire insertion portion that enables contact between the sensor accommodated in the sensor accommodating portion and the electric wire by inserting the electric wire. having a characterized by Rukoto.</p><p> The invention of claim 3 is the sensor fixture according to claim 1 or 2, wherein the side holders are inserted into an insertion portion through which the outer periphery of the side holder mounting portion is inserted and on both sides of the insertion portion. It is characterized by having an engaging arm provided and a locking portion provided on the engaging arm and fixed to the main holder side by locking with the locking portion on the other side.</p><p> The invention of claim 4 is the sensor fixture according to any one of claims 1 to 3, wherein the connector is provided with two electric wire lead-out portions, and the holder body is provided with two wire lead-out portions. Two of the connector insertion portions corresponding to these electric wire lead-out portions are provided, each connector insertion portion has an opening through which the drawn electric wire is inserted, and the sensor holding portion corresponds to these electric wire lead-out portions. Two electric wire insertion portions are provided, each electric wire insertion portion has an opening through which the drawn electric wire is inserted, and the sensor is characterized in that each electric wire insertion portion faces the electric wire.</p><p> The invention of claim 5 is the sensor fixture according to claim 4, which has the same shape by providing locking portions that can be engaged with and detached from each other on one and the other of the engaging arms of the side holder. Using two side holders, attach each side holder to the side holder mounting portion of the sensor holding portion while sandwiching the electric wire between the insertion portions, and then attach one and the other side holder to the engaging arm locking portion. Each side holder is attached to the main holder and the electric wire is pressed toward the sensor side by locking each other with the above.</p><p> The invention of claim 6 is the sensor fixture according to any one of claims 1 to 5, wherein the main holder and the side holder are removed between the main holder and the side holder and the connector. It is characterized in that a lock portion is provided to prevent it.</p><p> The invention of claim 7 is a sensor fixing structure using the sensor fixture according to any one of claims 1 to 6, wherein the electric wire lead-out portion of the connector is a tubular portion, and the main. The holder is attached to the connector by inserting the two connector insertion portions of the holder body into these tubular portions, so that each sensor faces each electric wire, and each side holder is the side of the main holder. It is characterized in that the electric wire is pressed toward the sensor side by being attached to the holder mounting portion.</p>

<p> Since the sensor fixture according to claim 1 is configured to press the sensor toward the electric wire side by attaching the side holder to the main holder after attaching the main holder to which the sensor is fixed to the connector, a tape or a band Unlike the conventional method of manually fixing the sensor using the sensor, the sensor can be easily mounted at low cost without any trouble, and the mounting error of the sensor and the detection error by the sensor are avoided.</p><p> Further, in the configuration of the present invention in which the main holder (sensor) is attached to the connector, since the sensor is always arranged close to the connector, the contact state detection performance of the connector by the sensor is extremely stable and excellent.</p><p> Further, since the side holder presses the electric wire toward the sensor side to improve the adhesion between the sensor and the electric wire, the current detection accuracy (connector contact state detection performance) by the sensor is further improved.</p><p> In addition, the sensor is protected from impacts caused by collisions with peripheral members between the main holder and side holders, and protective measures such as attaching protective members are not required to avoid damage, so the sensor is even lower. Can be implemented at a cost.</p><p> Further, since the electric wire is also protected between the main holder and the side holder and is unlikely to be bent, it is not necessary to take measures or consideration to prevent the sensor and the electric wire from peeling off, and the implementation cost is further reduced.</p><p> In addition, the space for attaching the tape or band is not required, the space utilization efficiency is improved, and the amount of material used and the cost are reduced by the amount of the tape or band.</p><p> In the sensor fixture of claim 2, the connector insertion portion of the holder body is inserted into the wire lead-out portion of the connector, the main holder is attached to the connector, and the electric wire is inserted through the wire insertion portion of the sensor accommodating portion accommodating the sensor. By mounting the side holder on the side holder mounting portion after making contact with the sensor fixture, the same effect as that of the sensor fixture according to claim 1 can be obtained.</p><p> In the sensor fixture of claim 3, the insertion portion of the side holder is inserted into the side holder mounting portion (sensor holding portion) of the main holder to be mounted, and the engaging arm locking portions provided on both sides of the insertion portion. Each side holder is fixed to the main holder by locking with the locking portion on the other side (for example, the locking portion of the mating side holder when two side holders having the same shape are used), and claim 1 or The same effect as that of the sensor fixture of claim 2 can be obtained.</p><p> The sensor fixture according to claim 4 corresponds to a connector provided with two wire lead-out portions, and the main holder has two connector insertion portions (openings) of the holder body and two wire lead-out portions. By inserting the two wire insertion portions (openings) of the sensor holding portion into the two wires and facing each sensor, the same effect as that of the sensor fixtures of claims 1 to 3 can be obtained. can get.</p><p> In addition, by providing openings in the connector insertion part of the holder body and the wire insertion part of the sensor holding part, the main holder (sensor) can be easily attached to the wire not from the axial direction but from the radial direction. it can.</p><p> The sensor fixture according to claim 5 has the same effect as the sensor fixture according to claim 4.</p><p> Further, by providing locking portions that can be engaged with and detached from each other on one and the other of the engaging arms of the side holders, it becomes possible to use two side holders having the same shape, and the implementation cost can be reduced accordingly.</p><p> The sensor fixture according to claim 6 has the same effect as the sensor fixture according to claims 1 to 5.</p><p> Further, since the lock portion provided between the connector and the main holder prevents the main holder and the side holder from falling off, the current detection function of the sensor is maintained high for a long period of time.</p><p> In the sensor fixing structure of claim 7, in the main holder, the connector insertion portion of the holder body is inserted into the tubular electric wire lead-out portion of the connector, and the sensor is attached to the connector to face each electric wire, and each side holder is By attaching the electric wire to the side holder mounting portion of the main holder and pressing the electric wire toward the sensor side to bring it into close contact with the sensor, the same effect as that of the sensor fixture according to claims 1 to 6 can be obtained.</p>

<figref num="1">It is a perspective view which shows the structure of the sensor fixture 1 by this invention.</figref><figref num="2">It is a perspective view which shows the state which the sensor 9, 9 is attached to the main rear holder 11.</figref><figref num="3">It is a perspective view which shows the state which the main rear holder 11 is attached to the connector 3.</figref><figref num="4">It is a perspective view which shows the state which the side rear holders 13, 13 are attached to the main rear holder 11 attached to the connector 3.</figref><figref num="5">It is a perspective view which shows the conventional example.</figref><figref num="6">It is a perspective view which shows the other conventional example.</figref>

Hereinafter, an embodiment of the sensor fixing tool according to the present invention and the sensor fixing structure using the same will be described with reference to FIGS. 1 to 4.

The sensor fixture 1 of the present embodiment has sensors 9 and 9 that detect the current of the electric wires 7 and 7 drawn from the electric wire drawing portions 5 and 5 of the connector 3 and monitor the connection state with the connector on the other side. It is configured to be fixed to the outer periphery of 7 and 7, and consists of a main rear holder 11 (main holder) and side rear holders 13, 13 (side holders). The main rear holder 11 is provided integrally with the holder body 15 mounted on the wire lead-out portions 5 and 5 side and the holder body 15, and holds the sensors 9 and 9 so as to be in contact with the outer peripheral portions of the wires 7 and 7. The side rear holders 13 and 13 are attached to the main rear holder 11 to press the electric wires 7 and 7 against the sensors 9 and 9.

Further, the holder body 15 has a connector insertion portion 19 through which the electric wire extraction portions 5 and 5 of the connector 3 are inserted, and the sensor holding portion 17 includes a side holder mounting portion 21 to which the side rear holders 13 and 13 are mounted. A wire that enables contact between the sensor housing 23,23 that houses the sensors 9, 9 and the sensor 9, 9 and the wire 7, 7 housed in the sensor housing 23, 23 by inserting the wires 7, 7. It is equipped with insertion sections 25 and 25.

Further, each side rear holder 13 has an insertion portion 27 for inserting the outer periphery of the side holder mounting portion 21 (sensor holding portion 17) of the main rear holder 11, and engaging arms 29, 31 provided on both sides of the insertion portion 27. And, the locking portion 33 provided on these engaging arms 29, 31 and fixing each side rear holder 13 to the main rear holder 11 by locking with the locking portions 35, 33 of the mating side rear holder 13. It has 35.

Further, the connector 3 is provided with two wire lead-out portions 5, 5, and the holder body 15 is provided with two connector insertion portions 19 corresponding to these wire lead-out portions 5, 5, and each connector is inserted. The portion 19 has an opening 37 through which the drawn electric wires 7 and 7 are inserted. The sensor holding portion 17 is provided with two wire insertion portions 25,25 corresponding to the wires 7, 7 drawn from these wire lead-out portions 5, 5, and each wire insertion portion 25 connects the wires 7, 7. It has an opening 39 for insertion, and sensors 9 and 9 are in contact with electric wires 7 and 7 in each electric wire insertion portion 25.

Further, as described above, two side rears having the same shape are provided by providing locking portions 33, 35 which can be engaged with each other on one and the other of the engaging arms 29, 31 of the side rear holders 13 and 13. Using the holders 13 and 13, attach each side rear holder 13 to the side holder mounting portion 21 (sensor holding portion 17) while sandwiching the electric wires 7 and 7 with the respective insertion portions 27, and then mount one and the other side rear holder 13 By locking each of the 13 to the main rear holder 11 with the locking portions 33 and 35 of the engaging arms 29 and 31, the side rear holders 13 are attached to the main rear holder 11 and the electric wires 7 and 7 are attached to the sensors 9 and 9 side. It is pressed and brought into close contact.

Further, in the sensor fixing structure 51 using the sensor fixing tool 1, the electric wire drawing portions 5 and 5 of the connector 3 are cylindrical portions 41 and 41 (cylindrical portions), and the main rear holder 11 is each connector of the holder main body 15. By inserting the insertion portion 19 into these cylindrical portions 41 and 41 and attaching them to the connector 3, the sensors 9 and 9 face the electric wires 7 and 7, and each side rear holder 13 is a main rear holder 11 (side). By being attached to the holder mounting portion 21), the electric wires 7 and 7 are pressed toward the sensors 9 and 9 as described above.

Further, between the main rear holder 11 and the side rear holders 13, 13 and the cylindrical portions 41, 41 of the connector 3, lock portions 43, 45 are provided to prevent the main rear holder 11 and the side rear holders 13, 13 from falling off. Has been done.

The connector 3 is used in a power supply circuit that supplies electric power to an electric motor for driving wheels of an EV (electric vehicle).

In the sensor fixture 1 and the sensor fixing structure 51, the sensors 9 and 9 are attached to the connector 3 as follows.

Sensors 9 and 9 are fixed to the sensor accommodating portions 23 and 23 of the main rear holder 11 (sensor holding portion 17) by press fitting, screwing, insert molding, or the like.

After that, the main rear placed between the wires 7 and 7 by passing the wires 7 and 7 through the openings 37 of the connector insertion portions 19 and 19 of the holder body 15 and the openings 39 of the wire insertion portions 25 and 25 of the sensor holding portion 17. The holder 11 is moved to the connector 3 side, and as shown in FIG. 3, the lock portions 43, 45 lock the holder 11 to the cylindrical portions 41, 41 of the connector 3. In this state, the sensors 9 and 9 face the electric wires 7 and 7.

After that, as shown in FIG. 4, the side rear holders 13 and 13 are attached to the side holder mounting portions 21 of the main rear holder 11 while sandwiching the electric wires 7 and 7 between the insertion portions 27, and then the engaging arms 29 and 31 are attached. The locking portions 33 and 35 lock each other to press the electric wires 7 and 7 toward the sensors 9 and 9, and the side rear holders 13 and 13 are engaged with the cylindrical portions 41 and 41 of the connector 3 by the locking portions 43 and 45. Stop. In this state, the sensors 9 and 9 detect the induced magnetic field of the electric wires 7 and 7 and monitor the contact state between the connector 3 and the mating connector.

In the sensor fixture 1 of the present embodiment, the main rear holder 11 to which the sensors 9 and 9 are fixed is attached to the connector 3, and then the side rear holders 13 and 13 are attached to the main rear holder 11 to connect the electric wires 7 and 7. Since it is configured to press against the sensors 9 and 9, unlike the conventional method, the sensors 9 and 9 can be easily fixed at low cost, and the mounting error and detection error of the sensors 9 and 9 are eliminated. Avoided.

In addition, the configuration of the sensor fixture 1 that attaches the main rear holder 11 (sensors 9, 9) to the connector 3 is that the sensors 9, 9 are always placed close to the connector 3, so the contact state detection performance of the connector 3 is extremely stable. It is excellent.

In addition, the side rear holders 13 and 13 press the electric wires 7 and 7 against the sensors 9 and 9 to improve the adhesion between the sensors 9 and 9 and the electric wires 7 and 7, so that the current detection accuracy (connector contact state detection performance) Is further improved.

In addition, sensors 9 and 9 are protected from impact between the main rear holders 11 and the side rear holders 13 and 13, so there is no need to consider attaching protective members to avoid damage. , Can be implemented at low cost.

In addition, the wires 7 and 7 are also protected between the main rear holder 11 and the side rear holders 13 and 13, and bending is unlikely to occur. No consideration is needed and the implementation cost is further reduced.

In addition, the space for attaching the tape 205 and the band 207 is not required, the space utilization efficiency is improved, and the amount of material used and the cost are reduced by the amount of the tape 205 and the band 207.

In addition, the side rear holders having the same shape are provided with the engaging arms 29, 31 of each side rear holder 13 and the engaging arms 29, 31 of the mating side rear holder 13, and the locking portions 35, 33 that can be engaged with and disengaged. It is possible to use two 13s, which can be implemented at a lower cost.

In addition, the main rear holder 11 (sensors 9, 9) can be connected to the wires 7, by providing openings 37, 39 in the connector insertion portions 19, 19 of the holder body 15 and the wire insertion portions 25, 25 of the sensor holding portion 17, respectively. With respect to 7, it can be easily attached from the radial direction, not from the axial direction.

In addition, since the lock portions 43 and 35 provided between the connector 3 and the main rear holder 11 and the side rear holders 13 and 13 are prevented from falling off, the current detection function of the sensors 9 and 9 is high for a long period of time. Be maintained.

1 Sensor fixture 3 connector 5,5 Electric wire drawer 7,7 Electric wire 9,9 sensor 11 Main rear holder (main holder) 13,13 Side rear holder (side holder) 15 Holder body 17 Sensor holder 19 Connector insertion part 21 Side holder mounting part 23,23 Sensor housing 25,25 Wire insertion part 27 Insertion 29,31 Engagement arm 33,35 Locking part 37,39 openings 41,41 Cylindrical part (cylindrical part) of connector 3 43,45 Locks between main rear holder 11 and side rear holders 13, 13 and connector 3.