JPH065055U - Terminal base for switch - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the work of sealing the holding pin hole and reduce the diameter of the holding pin to downsize the base body. [Structure] A terminal plate 5b is arranged in advance in a mold, the terminal plate 5b is held from the back side by a pressing pin to primary-mold the base 1, and a positioning rib 10 is formed on the back side of the base 1 by secondary molding. And forming a hole 8 for the pressing pin.
Close up.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a terminal base for a switch that detects the position of a shift lever for an automobile.

[0002]

[Prior art]

 This type of terminal base has a plurality of fixed contacts that make sliding contact with movable contacts provided on movable members such as shift levers. The fixed contact is formed by integrally embedding a terminal plate that serves as a contact in a resin base. That is, as shown in FIG. 6, during resin molding of the base 11, the terminal plate 12 having a predetermined shape is inserted into the molds A and B in advance, and the terminal plate 12 is held from the back side by the pin 13 so as not to move. Then, the resin is injected. After molding, a punching hole 14 of the pressing pin 13 appears on the back side of the terminal plate 12, and the punching hole 14 is sealed by fitting a bush 15 made of a conventional resin.

[0003]

[Problems to be solved by the device]

 However, in this conventional terminal base 11, since it is difficult to fit the bush 15 when the punching holes 14 of the holding pin 13 are small, the diameter of the holding pin 13 is limited to about 2 mm or more, and the number thereof is also limited. I couldn't install too many. Further, since the diameter of the pressing pin 13 is large, the width of the terminal plate 12 must be increased accordingly, and there is a limit to downsizing the main body. The present invention has been made in view of the above problems. It is easy to seal the holding pin hole, the diameter of the holding pin can be reduced, and the base body can be downsized. It is intended to provide

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a terminal plate in a mold in advance, holds the terminal plate from the back side with a pin to primary-mold a base, and forms a secondary molding on the back side of the base. This forms a positioning rib and closes the punched hole of the pressing pin.

[0005]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a terminal base for an inhibitor switch of an automobile according to the present invention, FIGS. 1 and 2 show a terminal base after primary molding, and FIGS. 3 and 4 show a base after secondary molding. 1 and 2, the terminal base 1 comprises a base portion 2, a shaft hole 3 formed in the base portion 2, and a socket portion 4.

The base portion 2 is covered with a cover (not shown), and a space having a fixed contact is housed in a space formed between the cover and the base portion 2. On the outer surface and the inner surface of the base portion 2, a plurality of terminal plates 5a to 5e and 6a to 6d are integrally embedded by primary molding. One ends of the terminal plates 5a to 5e on the outer surface side are bent to be exposed on the inner surface side, and the other ends project into the socket portion 4 to form terminals. Further, one end of the terminal plates 6a to 6d on the inner surface side is a fixed contact which is in sliding contact with the movable contact of the rotor together with the exposed portion on the inner surface side of the terminal plates 5a to 5e on the outer surface side, and the other end is the socket portion 4 It protrudes and becomes a terminal.

The terminal plates 5a to 5e on the outer surface are integrally formed in advance so that the mutual positional relationship does not shift. That is, the terminal plates 5a, 5b, 5c are integrated by the connecting portions 7a, 7b, and the terminal plates 5d, 5e are integrated by the connecting portion 7c. Similarly, although not specifically shown, the terminal plates 6a to 6d on the inner surface side are also integrally formed in the same manner. These terminal plates 5a to 5e and 6a to 6d are inserted at predetermined positions in the mold during the primary molding of the base 1, and are held by the pressing pins so that they are not displaced, and are molded integrally with the base 1. Has been done. In FIG. 1, a broken line circle 8 typically indicates a hole for the pressing pin on the inner surface side, and a solid line circle 9 typically indicates a hole for the outer holding pin. The connecting portions 7a to 7c of the terminal boards 5a to 5e are punched together with the molding resin after the primary molding. As a result, the terminal boards 5a to 5e are individually separated. The same applies to the terminal plates 6a to 6d on the inner surface side.

The primary-molded terminal base 1 is further inserted into a mold, and as shown in FIG. 3, a positioning rib 10 at a neutral position is secondarily formed on the outer surface side thereof. At the time of this secondary molding, the terminal plates 5a to 5e exposed on the outer surface of the terminal base 1 are covered with the secondary molding resin 1a, and as shown in FIG. Is closed and sealed. The positioning rib 10 allows the neutral position of the terminal base to match the neutral position of the shift lever when the shaft hole 3 is fitted to the rotary shaft of the shift lever and the terminal base is mounted at a predetermined position. It will be a guide for you.

As described above, since the hole 8 of each pressing pin is closed by the resin 1a during the secondary molding, the resin 1a is sufficiently inserted and closed even if the hole diameter is small. Therefore, the diameter of the pressing pin can be reduced to half that of the conventional one, that is, about 1 mm, and the width of the terminal plates 5a to 5e held by the pressing pin at the time of primary molding can also be set to about 1.5 mm. As a result, the terminal base body 1 itself can be downsized. Further, even if a large number of holes are provided as shown in the drawing, the punched hole 8 of each holding pin can be closed at once by secondary molding regardless of the number of the holes. This means that it is possible to provide a large number of pressing pins, which makes it possible to reliably hold the terminal plates 5a to 5e and 6a to 6d during the primary molding.

[0010]

[Effect of device]

 As is clear from the above description, according to the present invention, when the positioning rib is formed by the secondary molding, the hole of the pressing pin is closed with the resin, so that the hole can be completely closed even if the hole is small. be able to. Therefore, the diameter of the holding pin can be reduced, and the width of the terminal plate can be reduced accordingly, and the base body can be downsized. In addition, since the holes for each holding pin can be sealed with resin at the same time very easily, the work of fitting bushes into the individual holes as in the past is not necessary, and many holding pins are provided. Therefore, the terminal board can be securely held.

[Brief description of drawings]

FIG. 1 is an outer surface view of a terminal base according to the present invention after primary molding.

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is an outer surface view of the terminal base according to the present invention after secondary molding.

4 is a sectional view taken along line III-III in FIG.

5 is a sectional view taken along line II-II and line IV-IV of FIGS. 1 and 3. FIG.

FIG. 6 is a cross-sectional view showing a state in which a punch hole of a pressing pin of a conventional terminal base is sealed.

[Explanation of symbols]

1 ... Base, 5a-e ... Terminal board, 8 ... Hole, 10 ... Rib for positioning.

Claims (1)

[Scope of utility model registration request] 1. A terminal plate is previously arranged in a mold, and the terminal plate is held from the back side by a pressing pin to primary-mold a base,
A terminal base for a switch, characterized in that a positioning rib is formed on the back side of the base by secondary molding and the hole for the pressing pin is closed.