JP2879253B2 - Moving object detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a moving object detection device, and more specifically, to a linear movement or a rotational movement such as a rack or a gear in a rack and pinion mechanism. The present invention relates to a moving object detection device that detects a moving state of a moving object to be performed.

(Prior Art) A conventional example of this type of moving object detection device will be described with reference to FIG.

The moving object detection device 50 shown in the figure has a cylindrical body, one end of which is covered with a thin-walled closing portion 51a, for example, a synthetic resin case main body 51, and detects the inner surface of the closing portion 51a. The Hall IC 55 constituting the detection unit 52 facing the surface, the cable 53 for signal transmission arranged on the other open end side of the case main body 51, and the inside of the other open end side of the case main body 51 were filled. And a filler 58 made of synthetic resin.

The detection unit 52 includes the Hall IC 55, a magnet 56 for applying a magnetic field to the Hall IC 55, and a yoke 57 for forming a magnetic path.

Also, the three lead wires 55a, 55b, 55c of the Hall IC 55
Are led out along the side surface of the detection unit 52 so as to be located below the yoke 57, and the three core wires 53a,
They are connected to each other by soldering, etc., at 53b and 53c.

(Problems to be Solved by the Invention) However, in the case of the moving object detection device 50 described above,
Since each core wire 53a, 53b, 53c having a stranded structure of the cable 53 and the three leads 55a, 55b, 55c are connected to each other, a short circuit between these connecting portions is likely to occur. Has a problem that the detection unit 52 cannot exhibit normal detection characteristics.

Further, in the case of the above-described tamper structure, there is also a problem that the tamper portion is loosened and connection failure between the core wires 53a, 53b, 53c and the leads 55a, 55b, 55c is likely to occur.

Therefore, the present invention can make the connection parts of each lead of the signal conversion element and each core wire of the cable completely insulated from each other, and prevent the connection failure of the connection parts of each lead and each core wire. It is an object of the present invention to provide a moving object detection device capable of performing the above-described operations.

[Constitution of the Invention] (Means for Solving the Problems) The present invention provides a holder holding a detection unit including a signal conversion element having a plurality of lead wires, wherein the signal conversion element is connected to one open end of a case body. A moving object detection device that is mounted on the case body in an arrangement positioned on the side and includes a cable having a plurality of core wires for signal transmission on the other open end side of the case body, wherein the thickness of the holder is A plurality of connection holes having a reverse-prevention structure perforated in the portion, a core wire locking portion and a lead locking portion inserted through each of the connection holes at both ends; A connection member in the form of a plate provided with a reverse removal prevention piece that is locked to the prevention structure, and connecting each core wire of the cable to each core wire locking portion of each connection member, Each lead of the signal conversion element In which each connecting the de.

The connection hole of the holder has a reverse removal prevention structure, and the connection member inserted into the connection hole of the holder includes:
A reverse prevention piece for preventing the removal is provided in a protruding manner.

(Operation) According to the moving object detection device having the above-described configuration, each lead of the signal conversion element and each core wire of the cable are inserted into a plurality of connection holes formed in a thick portion of the holder. Since each connection is made via each connection member, each lead and each connection member, and each connection member and each core wire are completely separated and insulated, and the mutual insulation state is complete.

Also, each lead is connected to each lead locking portion of each plate-shaped connection member, and each core wire is connected to each core wire locking portion of each plate-shaped connection member. The connection failure due to the loosening of each lead or each core wire is eliminated as compared with the tangled connection.

Further, since the connection member is prevented from being pulled out by the reverse withdrawal prevention structure, disconnection of the lead due to the connection member coming off during the assembling work does not occur, and assembling reliability can be ensured. .

(Example) An example of the present invention will be described below.

Moving object detecting device 1 shown in FIG. 1, FIG. 3, and FIG.
Is a case body 2 made of a non-magnetic soft metal, that is, an aluminum, having a substantially cylindrical shape and a circular mounting plate 2a formed on the lower end side.
A substantially cylindrical holder 3 made of synthetic resin disposed in the case body 2, a detection unit 7 having a stacked structure of a Hall IC 4, a magnet 5 and a yoke 6 held by the holder 3, A lid 8 having a top plate portion 8a and a bent portion 8b made of a non-magnetic hard metal, that is, a thin stainless steel plate, which is attached to one open end of the main body 2, and the other open end of the case main body 2; A cable 9 having a three-core structure inserted through the cable body, a rubber cable cover 10 surrounding the inside of the case body 2 of the cable 9 and a portion protruding downward from the case body 2, and a case body of the cable cover 10 2 and a filler 12 made of synthetic resin and filled from the part inserted into the holder 2 to the inside of the holder 3.

The top plate portion 8a of the lid 8 covers the entirety of one open end of the case body 2. The bent portion 8b of the lid 8
As shown also in FIG. 2, is fitted in sliding contact with the inner peripheral surface of one open end of the case main body 2 and has a gap between the inner peripheral surface of the case main body 2 and the bent portion 8b. A seal structure is provided. That is, the O-ring 14 as a sealing member fitted in the concave groove 2b provided along the inner peripheral surface of the case main body 2 comes into close contact with the bent portion 8b, whereby the inside of the case main body 2 is sealed from the external space. It is supposed to be.

Further, the holder 3 is provided with three connection holes 15 penetrating from the upper end portion to the lower end portion of the right thick portion of the detection section 7.

As shown in FIG. 1, the connection hole 15 has a lower hole 15a through which the ends of the three core wires 17 of the cable 9 are inserted, and an end of each lead 4a of the Hall IC 4 facing each other. Hole 15b
And a small hole 15c communicating with the lower hole 15a and the upper hole 15b. Three connection members 16 are inserted into the respective connection holes 15, and each of the core wire 17 and the Hall IC 4 is formed. The lead 4a is connected with the connection member 16.

That is, as shown in FIG. 5 (b), the connection member 16 is made of a conductive material and is formed in a substantially rectangular shape, and has a core wire locking portion 16a formed of a circular hole at the lower end and a U-shape at the upper end. And a resilient reverse removal prevention piece 16c having a center is formed obliquely downward.

Then, when assembling the moving object detecting device 1, first, the core wire 17 is inserted into the core wire retaining portion 16a of the connecting member 16 and subjected to soldering processing and bending.
As shown in FIG. 1A, the connection hole 15 is inserted from the lower hole 15a side to the upper hole 15b to prevent the connection member 16 from being pulled out.
6c is locked to the bottom of the upper hole portion 15b so that this connecting member 1
6 is prevented from coming off, and the lead 4a of the Hall IC 4 is locked to the lead locking portion 16b projecting upward from the upper hole portion 15b, and soldering processing and bending processing are performed.
And each of the core wires 17 are connected via a connecting member 16 respectively.

In FIG. 1, 2c is a mounting hole, and 18 is the cable holder.
This is a fastening tool for bringing 10 into close contact with the cable 9.

Next, the operation of the above-described moving object detection device 1 will be described mainly on the connection state of each lead 4a, each connection member 16 and each core wire 17.

According to the moving object detection device 1, each lead 4 a of the Hall IC 4 is connected to each of the lead locking portions 16 b projecting upward from the upper hole 15 b of each connection hole 15. Each core wire 17 is provided in the lower hole portion 15a and the core wire locking portion 16a is provided.
Lead 4a, connecting member 16 and core wire 1
A total of three electric signal systems consisting of 7 are separated from each other, whereby the mutual insulation between them is complete and the short circuit between them can be prevented.

Further, since each lead 4a is connected to a U-shaped lead locking portion 16b of a plate-shaped connecting member 16, and each core wire 17 is connected to a core wire locking portion 16a also formed of a circular hole of the connecting member 16,
Compared with the case where the lead 4a and the core wire 17 are directly connected with each other as in the conventional example, the lead 4a and the core wire 17 are not loosened, thereby making it possible to avoid poor connection of each locking connection portion.

Furthermore, since the connection member 16 is prevented from falling off,
Even if the core wire 17 is pulled during the assembling work, the connection member 16 does not come out of the connection hole 15 and each lead 4a of the Hall IC 4 is not pulled, so that the Hall IC 4 moves or each lead 4a Is not disconnected, and the assembling of the moving object detection device 1 is ensured.

The present invention can be variously modified within the scope of the gist, in addition to the embodiments described above. For example, when used in combination with crimping connection or soldering, a more reliable connection becomes possible.

[Effects of the Invention] According to the present invention described in detail above, with the above-described configuration, there is no insulation failure or connection failure, there is no need to lead out a lead wire, connection is easy, and assembly is easy. As a result, a moving object detection device exhibiting stable detection characteristics can be provided.

In addition, since the connection member is prevented from being pulled out by the reverse removal prevention structure, disconnection of the lead or the like due to the connection member coming off during the assembling work does not occur, and assembling reliability can be achieved. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a moving object detecting apparatus according to the present invention, FIG. 2 is an enlarged partial sectional view showing a lid and an O-ring in the present embodiment, and FIG. FIG. 4 is a front view of the device, FIG. 4 is a plan view of the same, FIG. 5 (a) is a cross-sectional view showing a state where a connecting member is inserted into a connecting hole of a holder,
FIG. 5B is a perspective view showing a connection state between the detection unit, the connection member, and the cable, and FIG. 6 is a sectional view of a conventional moving object detection device. DESCRIPTION OF SYMBOLS 1 ... Moving object detection device, 2 ... Case main body, 3 ... Holder, 4 ... Hall IC, 4a ... Lead, 7 ... Detection part, 9 ... Cable, 15 ... Connection hole part, 16 ... ... Connection member, 16a ... Core wire locking part, 16b ... Lead locking part, 17 ... Core wire.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-235811 (JP, A) JP-A-54-136360 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01R 13/00 G01R 33/06 G01D 21/00

Claims (1)

(57) [Claims] 1. A holder holding a detection unit including a signal conversion element having a plurality of lead wires is mounted on the case main body in such an arrangement that the signal conversion element is located on one opening end side of the case main body. A moving object detection device comprising a cable having a plurality of core wires for signal transmission on the other open end side of the case body, wherein a plurality of the holders have a reverse removal prevention structure perforated in a thick portion of the holder. A connection hole portion, and a core wire locking portion and a lead locking portion respectively inserted into each connection hole portion are provided at both ends, and a reverse removal prevention piece locked to the reverse removal prevention structure portion of the connection hole portion is provided. A plate-shaped connecting member provided, each core wire of the cable is connected to each core wire locking portion of each connection member, and each lead of the signal conversion element is connected to each lead locking portion of the connecting member. Moving object characterized by connecting Detection device.