JP3030543B2 - Structure of throttle valve opening sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve opening sensor for detecting the opening of a throttle valve of an automobile, for example. In particular, the present invention relates to an improvement in a welded portion for welding a terminal insert-molded on a pole plate of a throttle valve opening sensor and a connecting member fixed to a substrate provided on the pole plate.

[0002]

2. Description of the Related Art Conventionally, as this kind of technique, there is a technique disclosed in Japanese Utility Model Laid-Open No. 63-148816, for example. In the throttle valve opening sensor of this technology, terminals are insert-molded on a pole board, and the terminals are fixed to a connecting member fixed to a substrate by soldering. However,
In the throttle valve opening sensor described above, since the terminals are fixed to the connection member by soldering, workability is poor,
There was a problem that it was not suitable for mass production. As means for solving this problem, as disclosed in Japanese Utility Model Laid-Open No. 1-104504, there is a means for electric resistance welding between the terminal and the connecting member.

[0003]

A conventional throttle valve opening sensor for welding a terminal and a connecting member as described above,
When insert-molding the terminal on the pole board, the terminal and the welded portion of the connection member are formed in a flat plate shape so as to face each other so that the mold supporting the terminal can be removed. A terminal and a connection member having a flat welding surface have a problem in that the welded portion formed by electric resistance welding such as projection welding has low jointability, cannot be firmly welded, and comes off.

In order to further solve this problem, as shown in FIG. 6, a projection 1b is formed on a welded portion 1a of a terminal 1. However, this means is that, when the terminal 1 is inserted into the pole board 2 and the terminal 1 is sandwiched between the mold 3 and the mold 4, the convex portion 1 b is formed, so that the space below the convex portion 1 b is formed. 5 can be done. In the space 5, the board surface 2a of the pole board 2
This causes a problem that the resin material flows in and the resin material adheres to a welded portion between the terminal 1 and the connection member.

According to the present invention, a convex portion is formed in a welded portion of a terminal to be welded to a connecting member, and a lower portion of the convex portion of the terminal is bent, so that when the terminal is insert-molded on a pole plate, the convex portion is formed. It is an object of the present invention to provide a throttle valve opening sensor that does not allow resin to flow around a portion and that can smoothly remove a mold that supports the terminal.

[0006]

SUMMARY OF THE INVENTION The invention of claim 1 of the present invention has been made to solve the above-mentioned problems of the prior art, and the terminal is arranged so as to protrude directly upward from the board surface. A throttle valve opening comprising: an electrode-formed electrode plate; a substrate provided in the electrode plate; a connection member fixed to the substrate; and the terminal having a convex portion formed on a welded portion to be welded to the connection member. In the degree sensor, the terminal has a bent portion or a protrusion formed on the pole plate side of the protrusion.

[0007] The invention of claim 2 is that the height of the bent portion or the projection is higher than the height of the projection.

According to a third aspect of the present invention, the width of the projection is longer than the width of the projection.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described in detail with reference to FIGS. Reference numeral 6 denotes, for example, a pole plate of a throttle valve opening sensor of an automobile, and a plurality of terminals 7 are insert-molded into two integrally formed connector portions 6a and 6b. The positions of the connector portions 6a and 6b are as follows.
It may be anywhere on the pole board 6 and is not particularly limited. For example, the connector portions 6a and 6b may be formed below the pole board 6. Further, the number of the connector portions 6a and 6b may be one.

The terminal 7 is made of, for example, a substantially L-shaped conductive metal plate. One end of the terminal 7 projects into the connector portions 6a and 6b, and the other end extends upward from the board surface 6d in the opening 6c of the pole board 6. The welding portion 7a protrudes toward it. As shown in FIG. 3, the terminal 7 has a portion protruding from the board surface 6d connected to connector portions 6a, 6b.
A bent portion 7b bent obliquely is formed on the side, and a welded portion 7a having a convex portion 7c at the tip is formed.

The welding portion 7a is projection-welded to the welding surface 9a of the connecting member 9 fixed to the end of the substrate 8.
Assuming that the length of the bent portion 7b is H1 and the height of the convex portion 7c is H2, H1 ≧ H2. The bending angle and the bent shape of the bent portion 7b are not particularly limited. The terminal 7 has a bent portion 7b,
On the side of the connection member 9 below the protrusion 7c, the terminal 7 is
b as long as it can abut the mold 10b.

The bent portion 7b may be formed, for example, by folding a portion below the convex portion 7c of the terminal 7 into a U-shape to project the height H1, and the tip of the bent portion 7b comes into contact with the mold 10a.
The projection 7c is a so-called projection formed by a punch or the like, and has, for example, a hemispherical shape.

As shown in FIGS. 1 and 2, the substrate 8 is fitted into a step 6e in an opening 6c of the pole plate 6 and is sandwiched by a lid member 11 which matches the opening end of the opening 6c. ing. The connecting member 9 is made of an elastic conductive plate member or the like, and has one end welded to the end of the substrate 8 by electric resistance welding such as spot welding, as shown in FIG. The other end of the connecting member 9 is bent into an L shape as shown in FIG.
Are arranged to face each other.

The first embodiment of the present invention is configured as described above, and its operation will be described in detail together with the manufacturing means. The terminal 7 and the connection member 9 are formed by pressing into the above-described shape. The connection member 9 is electrically resistance-welded to the substrate 8. The terminal 7 includes a mold 10a and a mold 10a shown in FIG.
Then, insert molding is performed on the pole plate 6 in a state sandwiched between them.

A space is formed between the terminal 7 below the bent portion 7b and the mold 10a because the terminal 7 forms the bent portion 7b slightly above the board surface 6d. As shown in FIG. 3, a resin material forming the pole plate 6 flows into this space.

A space is formed between the terminal 7 above the bent portion 7b and the mold 10b because the terminal 7 forms the bent portion 7b slightly above the board surface 6d. As shown in FIG. 3, since the lower end of the mold 10b and the end of the bent portion 7b are in contact with each other, the resin material forming the pole plate 6 does not flow into this space. This can prevent the resin material from flowing into and adhering to the welded portion 7a of the terminal 7.

When the electrode plate 6 is taken out from the molds 10a and 10b after the resin molding is completed, the bent part 7b is formed even if the terminal 7 has the convex part 7c. The mold 10b can be pulled out smoothly upward.

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. Note that the same materials as those in the first embodiment of the present invention are denoted by the same reference numerals and description thereof is omitted. The second embodiment of the present invention is a means for preventing the resin material which tries to enter the terminal 7 of the first embodiment from the surface 6d of the pole plate 6 below the convex portion 7c by the projection 12a.

Reference numeral 12 denotes a substantially L-shaped terminal, one end of which protrudes into the connector section, and the other end of which protrudes right above the board surface 6d, and is insert-molded on the pole board 6. The terminal 12
A projection 12c is formed at the center of a welding portion 12b to be projection-welded to the connection member 9. The terminal 12 has the protrusion 12a formed at a position between the lower side of the protrusion 12c and the board surface 6d.

The projections 12a and the projections 12c are formed by pressing, punching, or the like toward the surface to be welded to the connection member 9. Assuming that the height H3 of the projection 12a is the height H4 of the projection 12c, as shown in FIG. 5, H3> H4.

As shown in FIG. 4, when the width of the projection 12c is W2, the width W2 of the projection 12a is W1> W2. The shape of the protrusion 12a is not particularly limited as long as it meets the above conditions and has a flat tip end surface. The convex portion 12c is formed by the welded portion 7 of the first embodiment of the present invention described above.
Same as a.

The second embodiment of the present invention is configured as described above, and its operation will be described in detail along with the manufacturing procedure. The terminal 7 and the connection member 9 are formed by pressing into the above-described shape. The connection member 9 is electrically resistance-welded to the substrate 8. The terminal 7 includes a mold 10a and a mold 10b shown in FIG.
Then, insert molding is performed on the pole plate 6 in a state sandwiched between them.

Since the projection 12a protrudes from the terminal 12, a space is formed between the terminal 12 and a mold (not shown) on the side of the projection 12a, above and below the projection 12a. As shown in FIG. 5, the resin material forming the pole plate 6 flows into the lower space of the protrusion 12a. The resin material is provided with protrusions 12a.
As a result, the flow to the upper welded portion 12b is prevented. Thereby, it is possible to prevent the resin material from flowing into the welding portion 12b of the terminal 12 and attaching to the welding portion 12b.

When the electrode plate 6 is taken out from the mold after the resin molding is completed, even if the terminal 12 has the projection 12c, the projection 12a is formed so that the mold can be pulled out smoothly upward. Can be formed into a shape that can be used.

The structure of the throttle valve opening sensor according to the present invention is not applied only to the throttle valve opening sensor of an automobile.
The same operation and effect can be obtained even when used for electrical devices such as switches and sensors having the terminal 12.

[0026]

Since the present invention is constructed as described above, the following effects can be obtained. (1) The invention according to claim 1 of the present invention provides a pole plate in which terminals are insert-formed so as to protrude directly upward from the board surface, a board provided in the pole board, and a connecting member fixed to the board. When,
A throttle valve opening sensor comprising: a terminal having a projection formed at a welding portion to be welded to the connection member;
The terminal has a bent portion or a projection formed on the pole plate side of the projection, so that when the pole plate is formed in a mold, the resin material of the pole plate flows into the welding portion, and the resin material is Prevents adhesion to welds. (2) In the invention according to claim 2 of the present invention, the height of the bent portion or the protrusion is higher than the height of the convex portion, so that the mold arranged to hold the welded portion of the terminal in an upward direction. The welding portion can be smoothly removed, and the welding portion can be arranged in an opening close to the surface of the pole plate to perform projection welding, so that the throttle valve opening sensor can be downsized. (3) According to the invention of claim 3 of the present invention, since the width of the projection is longer than the width of the projection, the resin material of the pole plate can be prevented from adhering to the welded portion of the terminal, and can be firmly welded.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a view showing the first embodiment of the present invention, and is a longitudinal sectional view at the center.

FIG. 3 is a drawing showing the first embodiment of the present invention, and is an enlarged partial sectional view of a welded portion of a terminal.

FIG. 4 is a side view of a terminal according to a second embodiment of the present invention.

FIG. 5 is a drawing showing a second embodiment of the present invention, and is a partial cross-sectional view of a welded portion of a terminal.

FIG. 6 is an enlarged sectional view showing a welded portion of a terminal of a conventional throttle valve opening sensor.

[Explanation of symbols]

 6 Pole board 6d Board surface 7,12 Terminal 7a, 12b Welding part 7b Bend part 7c, 12c Convex part 8 Substrate 9 Connection member 12a Projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-1107904 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01B ^7/ 00-7/34

Claims (3)

(57) [Claims] 1. A pole plate (6) having terminals (7) and (12) inserted therein so as to protrude directly upward from a plate surface (6d), and a board (5) provided inside the pole plate (6). 8), a connecting member (9) fixed to the substrate (8), and projections (7c) and (12c) formed on the welded portions (7a) and (12b) to be welded to the connecting member (9). The terminals (7), (1
2), wherein the terminals (7) and (12) are connected to the protrusions (7c) and (1).
2c) A structure of a throttle valve opening sensor, wherein a bent portion (7b) or a projection (12a) is formed on the pole plate (6) side. 2. The invention according to claim 1, wherein the bent portion (7b) or the projection (12a) has a height (H).
1) and (H3) are the heights (H) of the convex portions (7c) and (12c).
2) The structure of the throttle valve opening sensor which is higher than (H4). 3. The throttle valve opening sensor according to claim 1, wherein a width (W1) of the projection (12a) is longer than a width (W2) of the projection (12c). Structure.