JPH0593087U - Electrical component - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a seal structure in which the seal member does not come out and the waterproof property of the seal portion does not deteriorate even when an external force is applied to the cord. [Structure] One end side of a cylindrical rubber boot 21 is attached to a base end portion of an output cord 20. A first seal portion that is in close contact with the outer circumference of the output cord 20 is formed on the inner circumference of the rubber boot 21 on one end side. A second seal portion, which is in close contact with the inner peripheral surface of the cavity, is formed on the outer periphery on the other end side of the rubber boot 21,
A flange portion that contacts the end surface of the cavity is formed inside the second seal portion. A circular hole into which the rubber boot 21 is inserted is formed in the center of the rubber holder 25. The rubber holder 25 is provided with a pair of legs 31 and engaging holes 31 a that engage with engaging protrusions 33 formed on both sides of the body 15. A pair of engagement legs 37 that covers the leg portions 31 of the rubber holder 25 in a state where the crown attachment portion 36 is attached to the body 15 is formed on the crown attachment portion 36 of the cord clamper 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric component having a waterproof seal member at a cord lead-out portion.

[0002]

[Prior Art]

 The seal member used for this type of electric component is mounted in the hole of the cord lead-out portion formed in the case, and the seal portion formed on the outer periphery of the seal member is pressed against the inner periphery of the hole, The cord outlet is waterproof.

[0003]

[Problems to be solved by the device]

 However, in the conventional seal structure as described above, when an external force acts on the cord and a force in the bending direction or the pulling direction is applied to the seal member, the seal member may be pulled out or the waterproofness of the seal part may be deteriorated. There was a risk of doing it.

[0004]

[Means for Solving the Problems]

 The present invention is intended to solve the above problems in the prior art, and as a means therefor, has a cord lead-out portion formed by opening in a case, and the cord lead-out portion is provided with an elastic member. In an electric component including a tubular seal member having: a seal member, the seal member includes a first seal portion that is in close contact with an outer peripheral surface of the cord, and a second seal portion that is in close contact with an inner peripheral surface of the cord lead-out portion; The seal member has a flange portion provided on the outer periphery, and the seal member is adapted to be fixedly attached to the case by the holding member being engaged with and attached to the case. .

[0005]

【Example】

 An embodiment in which the present invention is applied to a vehicle wheel sensor will be described below with reference to the drawings. FIG. 1 is a side view of the wheel sensor, FIG. 2 is a partially cutaway plan view, FIG. 3 is an exploded perspective view of the wheel sensor seen from the back side, and FIG. 4 is a vertical cross-sectional view of the wheel sensor.

As shown in FIG. 4, the wheel sensor A includes a bobbin unit B including a bobbin 1, a pole piece 3 and the like, a stay 13 for attaching the bobbin unit B to a vehicle body, the stay 13 and the aforesaid stay 13. The bobbin unit B is integrally fixed to the body 15. A cylindrical bobbin 1 is provided with a cylindrical hole 2 along its axis, and a pole piece 3 is press-fitted and fixed in the cylindrical hole 2. The bobbin 1 is provided with a terminal mounting portion 4 on its end surface, and a pair of male terminals 5 and 6 (6 is not shown) are press-fitted and fixed to the terminal mounting portion 4. Both ends of a coil 7 wound around the outer circumference of the bobbin 1 are entwined with the terminals 5 and 6, respectively. The terminals 5 and 6 are provided with connecting portions 5a and 6a at their tips. On the end surface of the bobbin 1, a disk-shaped magnet 9 and a yoke 10 are sequentially arranged in contact with the pole piece 3. Then, after the magnet 9 and the yoke 10 are arranged on the end surface of the bobbin 1, the connecting portions 5a and 6a of the terminals 5 and 6 are bent to form the bobbin unit B. The bobbin unit B is attached to the stay 13 by engaging the engagement portion provided on the bobbin 1 with the stay 13. A body 15 is formed by resin molding around the sensor unit C including the bobbin unit B and the stay 13, whereby the bobbin unit B is fixed to the stay 13.

As shown in FIGS. 3 and 4, a cavity 17 is formed in a portion of the body 15 located on the back surface side of the stay 13 so as to communicate with the outside. The terminals 5 and 6 are provided with connection portions 5a and 6a. Then, by inserting the joint 18 into the cavity 17, the female terminals 19 and 23 fixed to the inside of the joint 18 by the claw portions 18 a and connected to the output cord 20 are connected to the terminals 5 and 6. Connected to.

As shown in FIGS. 1 to 4, one end of a cylindrical rubber boot 21 is attached to the base end of the output cord 20, and the other end of the rubber boot 21 is attached to the end. The base end of the joint 18 is in a fitted state. Here, a first seal portion 21a is formed on the inner periphery of one end of the rubber boot 21, and when the output cord 20 is inserted into the rubber boot 21, the first seal portion 21a outputs The close contact with the outer peripheral surface of the cord 20 prevents water from entering from one end side of the rubber boot 21. On the other end side of the rubber boot 21, a second seal portion 21b is formed on the outer periphery thereof, and a flange portion 21c is formed inside the second seal portion 21b. A circular hole 30 is formed in the center of the rubber holder 25 made of a metal plate, and the rubber holder 25 is inserted into the rubber boot 21 before the output cord 20 is connected. Has been The rubber holder 25 is provided with a pair of legs 31, 32, and the legs 31, 32 are provided with engaging protrusions 33, 34 (34 not shown) formed on both sides of the body 15. Engagement holes 31a and 32a for engaging with are formed. When the female terminals 19 and 23 are connected to the male terminals 5 and 6 as described above, the other end of the rubber boot 21 is fitted into the cavity 17 and the second seal portion 21b is formed. By closely contacting the inner peripheral surface of the cavity 17 and further pressing the rubber holder 25 against the flange portion 21c of the rubber boot 21, the engagement holes 31a and 32a formed in the leg portions 31 and 32 of the rubber holder 25 are inserted into the body. The rubber boot 21 is prevented from coming off by engaging with the engaging projections 33 and 34 formed on the base 15 (FIGS. 1 and 2). In this way, the rubber boot 21 is in a state in which it is prevented from coming off by the rubber holder 25. Therefore, even if an external force acts on the output cord 20 and a force in the bending direction or the pulling direction is applied to the rubber boot 21, the rubber boot 21 does not come out. Does not come out of the cavity 17 and the waterproof property of the second seal portion 21b does not deteriorate. Further, since the flange portion 21c of the rubber boot 21 is pressed against the end surface of the cavity 17 by the pressing force of the rubber holder 25 (FIGS. 2 and 4), the second seal portion 21b and the flange portion 21c prevent It is possible to achieve a heavy waterproof structure, and as a result, it is possible to completely prevent water from infiltrating into the connecting portions between the terminals 5, 6 and the terminals 19, 23.

The output cord 20 is fixed in a predetermined lead-out direction by a cord clamper 22 fixed to the body 15. The cord clamper 22 is formed of a metal plate material, and has a clamp portion 35 that holds the output cord 20 and a crown attachment portion 36 that is attached to the body 15. A pair of engaging legs 37, 38 (38 is not shown) are formed on the crown portion 36 of the cord clamper 22 so as to hang down from both sides thereof, and the crown portion 36 is crowned on the body 15. In this state, the pair of engaging legs 37 and 38 are arranged to cover the leg portions 31 and 32 of the rubber holder 25 (FIG. 1). Further, the body 15 is formed with concave grooves 39, 40 (40 is not shown) on both sides thereof, the cord clamper 22 is attached to the body 15, and the engaging legs 37, 38 are formed in the concave grooves. By crimping the grooves 39 and 40, the cord damper 22 can be securely fixed to the body 15. When the engaging legs 37 and 38 are crimped to the body 15 in this manner, the engaging legs 37 and 38 press the leg portions 31 and 32 of the rubber holder 25 (FIG. 2). The engagement holes 31a and 32a formed in the leg portions 31 and 32 of the rubber holder 25 and the engagement protrusions 33 and 34 formed in the body 15 are never disengaged, and as a result, the rubber holder 25 It is possible to reliably prevent the rubber boot 21 from coming off due to.

As shown in FIG. 4, the tip 3a of the pole piece 3 is exposed from the body 15, and the tip 3a can catch the change in the external magnetic force line. Then, the change in the magnetic force line captured by the tip 3a of the pole piece 3 is converted into an electrical signal by the coil 7 wound around the bobbin 1 and sent to a measuring device (not shown) via the output line 20. To be done.

In the above embodiment, the wheel sensor, which is a rotation sensor, has been described as an example, but the invention is not limited to this type of electric component, and the cord lead-out portion is a sealing member for waterproofing. Any structure having a structure can be applied.

[0012]

[Effect of the device]

 As described above, according to the present invention, in the electric component having the cord lead-out portion formed by opening in the case, and having the elastic cylindrical sealing member in the cord lead-out portion, the seal member is the cord. The seal member includes a first seal portion that is in close contact with the outer peripheral surface, a second seal portion that is in close contact with the inner peripheral surface of the cord lead-out portion, and a flange portion provided on the outer periphery of the case. Since the flange is locked by the holding member that is attached by being attached to the case and is fixed to the case, the seal member is in the state of being prevented from coming off by the holding member. Even if a force is applied to the seal member in the bending direction or the pulling direction due to the action of, the seal member will not come off or the waterproofness of the seal portion will not deteriorate, which is an excellent effect. Further, since the flange portion of the seal member is pressed against the end surface of the cord lead-out portion of the case by the holding member, a double waterproof structure including the second seal portion and the flange portion can be achieved. As a result, there is an excellent effect that it is possible to completely prevent water from entering the cord derivation part. Further, the electric component further includes a cord clamper for fixing the cord in a predetermined pull-out direction, and an engaging portion between the holding member and the case is locked by an engaging leg formed on the cord clamper. By doing so, the engaging portion between the holding member and the case is not disengaged, so that the retaining member can reliably prevent the seal member from coming off, which is a remarkable effect.

[Brief description of drawings]

1 is a side view of a wheel sensor. FIG.

FIG. 2 is a plan view in which a part of the wheel sensor is cut away.

FIG. 3 is an exploded perspective view of the wheel sensor as viewed from the back side.

FIG. 4 is a longitudinal sectional view of the wheel sensor.

[Explanation of symbols]

 A wheel sensor 15 body 17 cavity 20 output cord 21 rubber boot 21a first seal portion 21b second seal portion 21c flange portion 22 code clamper 25 rubber holder 31 leg portion 31a engagement hole 32 leg portion 32a engagement hole 33 engagement Mating protrusion 37 Engaging leg

Claims (3)

[Scope of utility model registration request] 1. In an electric component having a cord lead-out portion formed by opening in a case, and having a tubular seal member having elasticity in the cord lead-out portion, the seal member is in close contact with an outer peripheral surface of the cord. A first seal portion, a second seal portion that is in close contact with the inner peripheral surface of the cord lead-out portion, and a flange portion provided on the outer periphery thereof are provided, and the seal member engages with the case. An electric component characterized in that the flange portion is locked by a holding member to be attached and fixed to the case. 2. The electric component according to claim 1, wherein the flange portion of the seal member is pressed against the end surface of the cord lead-out portion of the case by the holding member. 3. The electric component further comprises a cord clamper for fixing the cord in a predetermined pull-out direction, and an engaging leg formed on the cord clamper locks an engaging portion between the holding member and the case. The electrical component according to claim 1, characterized in that.