JP4204372B2 - Secondary molded products for switches - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a secondary molded product for a switch.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known one in which a push button is integrally formed with a case in which an electronic component or the like is accommodated. (Patent Document 1)
In this case, a push button and a case are integrally formed by inserting a first formed push button into a mold for forming the case. After the molding, the push button is connected to the case via a variable thin portion formed thin, and can be pressed.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-6187
[Problems to be solved by the invention]
When a case with a push button is used on another panel (for example, a car body or a wall surface), there may be a seal between the case and the panel. In the above structure, a separate part for sealing is newly provided. Therefore, when manufacturing a case with a push button, there was a problem that assembly of a seal part was newly required and the number of assembling steps increased.
The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a molded product for a switch that can maintain production efficiency with the addition of a seal structure.
[0005]
[Means for Solving the Problems]
As means for achieving the above object, the invention according to claim 1 is capable of being connected to a movable part that opens and closes the switch by approaching or contacting the switch provided on the casing, and the vehicle body side. A secondary molded product for a switch, in which a primary molded product including a mounting portion is inserted to form a seal portion that can seal between the vehicle body and the mounting portion, and the mounting portion has an opening. In addition, the movable portion is disposed in the opening portion so as to face the switch, and the seal portion is made of an elastic material and covers the outer surface side of the attachment portion. An initial position in which the movable part is connected to the attachment part and the movable part is separated from the switch, and an operating position in which the movable part approaches or contacts the switch. A through hole is provided at a position surrounding the opening in the mounting portion, and a part of the sealing portion is attached to the mounting portion when the sealing portion is molded. A retaining rib is formed around the inner surface of the part, and the retaining rib is formed in an annular shape so as to surround the opening, and is in close contact with the casing over the entire circumference. It is characterized in that it is configured to seal between the mounting portion .
[0006]
The invention of claim 2 is characterized in that, in the first aspect of the invention, in the primary molding, the movable part and the attachment part are connected by a connecting part formed to be able to bend.
The invention according to claim 3 is characterized in that, in the thing according to claim 1, in the primary molding, the movable part and the attaching part are connected by a connecting part formed so as to be breakable. .
[0007]
[Action and effect of the invention]
<Invention of Claim 1>
Since the movable part and the attaching part are formed integrally with the seal part by secondary molding after the primary molding, a dedicated assembling work is not required at the time of production, and the production efficiency is good.
<Invention of Claim 2>
According to the invention of claim 2, at the time of primary molding, since the movable part and the attachment part are connected by the connecting part, both parts can be collectively set with respect to the mold for secondary molding, Excellent workability. Moreover, since the connection part is a structure which can be bent, it can be bent with a seal part at the time of operation, and the operation part is displaced to the relay contact side.
[0008]
<Invention of Claim 3>
According to the invention of claim 3, at the time of primary molding, the movable part and the attaching part are connected by the connecting part, but at an appropriate time after the secondary molding, for example, the movable part may be pressed firmly. For example, the connecting part can be broken and the movable part and the attaching part can be separated. After that, since it is only necessary to bend the seal portion during the pressing operation, the operation is easy.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS.
The present embodiment illustrates a switch unit S for unlocking the back door 11 of the vehicle 10. A concave portion 12 for attaching a number plate or the like is provided in the central portion of the back door 11. An accommodation hole 13 is opened on the upper surface of the recess 12, and as shown in FIG. 2, the switch unit S vertically penetrates the accommodation hole 13 through a resin joint panel 15. It is attached. The joint panel 15 is provided with a downward flange piece 17 on the outer edge portion of the substrate portion to which the switch unit S is attached. This is a cover for preventing the switch unit S from being exposed to the outside.
[0010]
The back door 11 incorporates an electric lock mechanism (not shown) and an electric circuit board for controlling the opening and closing of the lock, and a switch unit S is connected to the electric circuit board via a connector 58. . This switch unit S is a normally open type, and when both contacts 52 and 53 of the switch box 51 are closed by a manual pressing operation, the electric circuit is activated to automatically unlock the electric lock mechanism. It has become.
[0011]
As shown in FIG. 2, the switch unit S includes a box-shaped casing 55 and is connected to an electric circuit board via a connector 58 and both contact points 52 provided on the switch box 51. 53 and an operation unit 20 (corresponding to the secondary molded product for a switch of the present invention) for opening and closing both the contacts 52 and 53.
The switch box 51 and the two contacts 52 and 53 correspond to the switch of the present invention.
[0012]
The switch box 51 is attached to a central portion on the lower surface side of the casing 55, and a fixed contact 53 on the lower surface side of the switch box 51 and a cantilever movable formed so as to be able to contact the fixed contact 53. A contact 52 is attached. The movable contact 52 is separated from the fixed contact 53 in the natural state, but when the free end thereof is pushed upward, the movable contact 52 is elastically bent toward the side close to the fixed contact 53 and comes into contact with the fixed contact 53. Yes. When both the contacts 52 and 53 are closed, the electric circuit described above causes the electric lock mechanism to perform the unlocking operation.
[0013]
The operation unit 20 is a primary molded product composed of a mounting plate (corresponding to the mounting portion of the present invention) 21 for the joint panel 15 and a movable member (corresponding to the movable portion of the present invention) 31 for opening and closing both the contacts 52 and 53. By inserting and performing secondary molding, these primary molded products and a seal member (corresponding to the seal portion of the present invention) 40 described later are integrally molded. More specifically, the mounting plate 21 is made of a hard resin (for example, ABS, nylon, PBT, polypropylene, etc.) having a relatively high mechanical strength. As shown in FIGS. The substrate portion 22 is formed.
[0014]
An opening 25 having a substantially rectangular shape is formed in the central portion of the substrate portion 22, and a support wall 26 is erected over the entire periphery of the opening edge. The support wall 26 has an annular shape and is sized so as to be fitted to the inner peripheral side of the casing 55. Further, as shown in FIG. 2, a locking projection 27 is formed to project outward on the outer surface side of the support wall 26, while the locking projection 27 can be locked on the inner peripheral side of the casing 55. A locking recess 56 is formed, and when the support wall 26 and the casing 55 are fitted together, the locking recess 56 and the locking projection 27 are locked.
[0015]
The movable member 31 is made of a hard resin (for example, ABS, nylon, PBT, polypropylene, etc.) having a relatively high mechanical strength, like the mounting plate 21, has a block shape, and is formed separately from the mounting plate 21. It has become. The size of the movable member 31 is set to be smaller than the opening 25 of the mounting plate 21. The movable member 31 is disposed at a position facing the switch box 51 in the opening 25 and has a gap 29 between the inner wall of the support wall 26. In possession. That is, the mounting plate 21 and the movable member 31 are not directly connected, and the movable member 31 is supported by the seal member 40 disposed on the lower surface side of the mounting plate 21 as will be described in detail later. It has become.
[0016]
With this configuration, the movable member 31 has an upper surface 32 at the initial position where the upper surface 32 is separated from the movable contact 52 of the switch box 51 (the position shown in FIG. 5), and the upper surface 32 of the movable member 31 as the movable contact 52 of the switch box 51. It supports so that it can displace between the operation position (position shown in FIG. 6) which contacts and closes both contacts 52 and 53. That is, since the sealing member 40 is made of an elastic member (for example, soft resin, rubber, elastomer, etc.), when the lower surface of the movable member 31 is pressed from below as shown in FIG. Among them, the seal member 41A corresponding to the gap 29 between the mounting plate 21 and the movable member 31 is elastically bent, and the movable member 31 can be displaced from the initial position to the operating position.
[0017]
The seal member 40 has a main body portion 41 having a size capable of covering the outer surface side of the substrate portion 22 of the attachment plate 21, and the attachment plate 21 and the movable member 31 that are primarily molded are inserted into the main body portion 41. It is formed integrally. That is, the movable member 31 is provided with four concave portions 35 that are open toward the upper surface 32 side by side along the length direction. Each recess 35 is formed to have substantially the same size, and a communication hole 36 penetrating the movable member 31 up and down is formed on the lower surface side thereof. In addition, through holes 28 are intermittently provided in the substrate portion 22 of the mounting plate 21 so as to surround the opening 25, and at the time of insert molding, as shown in FIG. In addition, a material such as resin goes around from the through hole 28 toward the upper surface side of the substrate portion 22. These resin portions that have turned around form retaining ribs 44 and 45 in the recess 35 and on the upper surface of the substrate portion 22, respectively. That is, the retaining ribs 44 and 45 are solidified in a state where the movable member 31 and the mounting plate 21 are sandwiched between the main body portion 41 and the movable member 31 and the mounting plate 21 so that the movable member 31 and the mounting plate 21 are the main body of the seal member 40. The part 41 is prevented from being pulled out.
[0018]
As shown in FIG. 4, the retaining rib 44 molded in the recess 35 is set so that the upper surface side does not protrude from the upper surface 32 of the recess 35 and is accommodated in the recess 35 in a solidified state. Yes. Further, the interval between the recesses 35 is wide between the recesses 35B and 35C arranged at the center, but this is the contact surface 32A with respect to the movable contact 52 of the switch box 51.
[0019]
Further, as shown in FIGS. 3 and 4, the retaining rib 45 of the substrate portion 22 is formed in an annular shape so as to surround the opening 25, and seals the switch box 51 in addition to the retaining action described above. It is like that. That is, when the casing 55 is attached to the support wall 26, the retaining rib 45 is in close contact with the flange 57 provided on the casing 55 over the entire circumference, and between the casing 55 and the substrate portion 22. Is sealed over the entire circumference.
[0020]
In addition, a cover piece 42 having a U-shaped cross section is integrally formed on the outer edge of the main body 41 during secondary molding. The cover piece 42 has an inner peripheral side that is in close contact with the end surface of the substrate portion 22 and the edge portion of the upper surface of the substrate portion 22. The cover piece 42 is formed in an annular shape over the entire circumference of the substrate portion 22, and a seal protrusion 43 is provided upward on the outer peripheral side (upper side) of the cover piece 42. The seal protrusion 43 is also formed in an annular shape, and when the entire switch unit S is attached to the joint panel 15 by a locking portion 23 described later, the seal protrusion 43 is in close contact with the surface side of the joint panel 15. Thus, the joint panel 15 and the mounting plate 21 are sealed over the entire circumference, and the watertightness of the switch box 51 is secured together with the retaining rib 45.
As shown in FIG. 4, a pair of protrusions 22 </ b> A are formed to protrude downward at positions near the left and right ends of the substrate portion 22 of the mounting plate 21, and this is a seal member 40, particularly a cover piece 42. Is restricted to move along the outer surface of the substrate portion 22.
[0021]
Next, a support structure for fixing the switch unit S configured as described above to the joint panel 15 will be described. As shown in FIG. 5, a locking portion 23 having a pair of locking pieces 24 at the front end is provided at a position near the left and right ends of the substrate portion 22, while a locking portion is provided on the joint panel 15 side. A pair of locking holes 15 </ b> A that can be locked to the 23 locking pieces 24 is provided. When the locking portion 23 is pushed into the locking hole 15A, both locking pieces 24 are elastically displaced in directions close to each other to allow the pushing operation, and return when the locking piece 15 passes through the locking hole 15A. Then, it is locked to the upper surface side of the joint panel 15 so as to prevent the attachment plate 21 and thus the entire switch unit S from being pulled out.
[0022]
The action and effect of this embodiment will be specifically described.
First, the procedure for manufacturing the switch unit S is such that the mounting plate 21 and the movable member 31 are first molded in advance, and these primary molded products are placed in the cavity of the mold for secondary molding in which the operation unit 20 is formed. Insert and secondary mold. Thereby, the operation unit 20, that is, the seal member 40, the movable member 31, and the mounting plate 21 are integrally formed. Subsequently, the operation unit 20 and the switch box 51 are assembled. For this purpose, the support wall 26 of the operation unit 20 is directly opposed to the casing 55, and the support wall 26 is pushed into the casing 55 from this state. When the support wall 26 is almost pushed into the casing 55, the locking projection 27 of the support wall 26 is locked to the locking recess 56 of the casing 55. As a result, the operation unit 20 is held in the retaining state with respect to the casing 55, and the assembly of the switch unit S is completed. In this state, the retaining rib 45 of the seal member 40 is in close contact with the flange 57 of the casing 55 over the entire circumference, and seals between the mounting plate 21 and the casing 55.
[0023]
Thereafter, the locking unit 23 of the switch unit S is inserted into the locking hole 15A of the joint panel 15 of the back door 11 and locked, and if the connector 58 is connected to the electric circuit for locking, the switch unit S is attached to the vehicle. Is completed. In a state where the assembly with respect to the vehicle is completed, the seal projection 43 of the seal member 40 is in close contact with the lower surface side of the joint panel 15 over the entire circumference, and seals between the mounting plate 21 and the joint panel 15. ing. In this way, the casing 55 is double sealed by the seal protrusion 43 and the retaining rib 45, thereby preventing water and dust from entering the switch box 51.
In this attached state, the movable member 31 is separated from the contact surface 32A of the movable member 31 by the main body 41 of the seal member 40, the movable contact 52 of the switch box 51, and the movable contact 52 and the fixed contact 53. The lower surface of the movable member 31 is supported at an initial position that is substantially flush with the lower surface of the substrate portion 22 of the mounting plate 21.
[0024]
In order to unlock the back door 11 from this state, as shown in FIG. 5, the center portion of the seal member 40 of the switch unit S is pressed from the lower side to the upper side. Then, the seal member 41A corresponding to the gap 29 between the mounting plate 21 and the movable member 31 in the seal member 40 is elastically bent to move the movable member 31 upward from the initial position and displace it to the operating position shown in FIG. . When the movable member 31 reaches the operating position, the free end side of the movable contact 52 is pushed and elastically displaced, and the movable contact 52 contacts the fixed contact 53. Thus, when both contacts 52 and 53 are closed, the electric circuit for locking is activated, and the electric lock mechanism is automatically unlocked.
[0025]
According to the present embodiment, the operation unit 20 is formed by integrally molding the movable member 31 and the attachment plate 21 that are primarily molded with the seal member 40 by secondary molding. For this reason, the operation unit 20 can be integrated with the function of attaching to the joint panel 15, the function of opening and closing the fixed contact 53, and the sealing function, and no other dedicated parts are required, so that a dedicated assembly operation is required at the time of manufacture. Therefore, production efficiency is good.
Further, since the movable member 31 is supported by a seal member 40 made of an elastic material (for example, soft resin, rubber, elastomer, etc.), the support is supported by a hard resin material having a relatively high mechanical strength. Compared to the above, the durability against the pressing operation of the switch unit S is excellent.
[0026]
Further, the switch box 51 and the casing 55 are not necessarily attached to the operation unit 20 side, and may be directly attached to the vehicle body side. However, as shown in the present embodiment, the switch box 51, the casing 55, and the operation unit. 20 is a switch unit S, and the switch box 51 and the like are indirectly attached to the vehicle body side, the overall handling, compared to the type in which the switch box 51 and the casing 55 are directly mounted on the vehicle body, Excellent workability during assembly.
[0027]
Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the first embodiment, the mounting plate 21 and the movable member 31 are individually formed at the time of primary molding. However, in the second embodiment, the mounting plate 21 and the movable member 31 are integrally formed at the time of primary molding. Since other configurations are the same as those in the first embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.
[0028]
As shown in FIG. 7, one end side of a connecting member (corresponding to the connecting portion of the present invention) 73 is connected to each of the four corners on the inner surface side of the support wall 71B, while the other end side of each connecting member 73 is movable. The upper and lower surfaces of the member 72 are connected to the left and right of the lower surface, respectively, and the movable member 72 is directly connected to the support wall 71B by these four connecting members 73. As shown in the figure, the connecting member 73 has an S shape and is formed to be able to bend. The S-shape is formed in this manner by making the connecting member 73 have a long bending path, so that the movable member 72 is tilted during the pressing operation, or is shifted to one side of the support wall 71B. Even so, the displacement operation is allowed.
[0029]
Further, the plate thickness dimension of the connecting member 73 is set to be thinner than the plate thickness dimension of the substrate portion 71A as shown in FIG. With this configuration, even when the mounting plate 71, the movable member 72, and the connecting member 73 are made of a hard material having a relatively high mechanical strength, the connecting member 73 is sealed when the switch is pressed. The movable member 72 is allowed to be displaced by being bent together with the member 40.
[0030]
In this way, if the mounting plate 71 and the movable member 72 are integrally formed at the time of primary molding, the production efficiency of the operation unit 20 can be improved as compared with the case where the mounting plate 71 and the movable member 72 are configured separately. Can be high. That is, in the case of a separate configuration, it is necessary to set the mounting plate 71 and the movable member 72 individually in the mold at the time of secondary molding (insert molding), but they are integrally formed. This is because it is possible to set all at once.
In addition, by adopting such a configuration, the operation unit 20 can be so-called two-color molding (a molding method in which two types of materials are molded simultaneously in one mold), and further, the production efficiency is improved. Is planned.
[0031]
<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the mounting plate 71 and the movable member 72 are installed by the connecting member 73 that can be bent. In the third embodiment, the mounting plate 71 and the movable member 72 are installed by the connecting member 75 that can be separated (breakable). To do. Since other configurations are the same as those of the second embodiment, the same components are denoted by the same reference numerals, and redundant description is omitted.
[0032]
As shown in FIG. 9, a pair of left and right connecting members 75 are installed between the upper surface of the movable member 72 and the support wall 71B, and between the lower surface of the movable member 72 and the support wall 71B. The width dimension of the connecting member 75 is formed narrower than the width dimension of the connecting member 73 of the second embodiment, and is linearly connected to the support wall 71B. As shown in FIG. 10, the connecting member 75 is set such that the plate thickness dimension of both end portions 75A is sufficiently thinner than the plate thickness dimension of the other portion 75B. If the movable member 72 is strongly pressed, the connecting portion 75 can be broken and the movable member 72 and the mounting plate 71 can be separated. Therefore, the subsequent pressing operation of the movable member 72 can be performed in a state where the connection with the mounting plate 71 is broken, and the operability is excellent.
[0033]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
[0034]
(1) In the first to third embodiments, the switch unit S is used for opening and closing the lock of the back door 11. However, the application is not limited to the back door 11, and in particular, the mounting portion is sealed. It is effective if applied to what is necessary.
[0035]
(2) In the second and third embodiments, the support wall 71B and the movable member 72 are connected by the four connecting members 73 and 75. However, the number of the connecting members 73 and 75 is, for example, two or six. It may be a book or the like.
[0036]
(3) In the first to third embodiments, the attachment plate 21 is attached to the joint panel 15 by elastic locking by the locking portion 23. However, it is sufficient if both the members 15 and 21 are fixed. For example, it may be attached by screwing, press fitting or the like.
[0037]
(4) In the first to third embodiments, the movable contact 52 is bent by the movable member 31 and the both contacts 52 and 53 are closed. However, the non-contact configuration (for example, the switch side is configured by a proximity switch). It is also possible to detect the displacement of the movable member.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a rear side of a vehicle applied to the first embodiment. FIG. 2 is a cross-sectional view showing a state where a switch unit is attached to the vehicle. FIG. 3 is a plan view of an operation unit. FIG. 5 is a sectional view showing the initial position of the movable member. FIG. 6 is a sectional view showing the operating position of the movable member. FIG. 7 is a plan view of the operating portion in the second embodiment. FIG. 9 is a plan view of the operation unit in the third embodiment. FIG. 10 is a cross-sectional view of the operation unit in the third embodiment.
20 ... operation part (secondary molded product for switch)
21 ... Mounting plate (mounting part)
31 ... movable member (movable part)
40: Seal member (seal part)
51. Switch box (switch)
52. Movable contact (switch)
53 ... Fixed contact (switch)

Claims (3)

Inserting a primary molded product comprising a movable part that opens and closes the switch by being close to or in contact with a switch provided on the casing and an attachment part that can be connected to the vehicle body side, and inserts the vehicle body and the attachment part Is a secondary molded product for a switch in which a seal portion that can be sealed between is molded,
An opening is formed in the attachment portion, and the movable portion is disposed in the opening to face the switch.
The seal portion is made of an elastic material and is formed so as to cover the outer surface side of the attachment portion, so that the movable portion and the attachment portion are connected, and the movable portion is connected to the switch. On the other hand, it is configured to be elastically supported so as to be displaceable between an initial position separated from the switch and an operating position close to or in contact with the switch,
A through-hole is provided at a position surrounding the opening in the attachment portion, and when the seal portion is molded, a part of the seal portion goes around to the inner surface side of the attachment portion, and a retaining rib is formed. The stop rib is formed in an annular shape so as to surround the opening, and is configured to be in close contact with the casing over the entire circumference to seal between the casing and the mounting portion. Secondary molded product.   2. The secondary molded product for a switch according to claim 1, wherein the movable portion and the attachment portion are connected by a connecting portion formed so as to be able to be bent during primary molding.   2. The secondary molded product for a switch according to claim 1, wherein the movable part and the attachment part are connected by a connecting part formed so as to be ruptured during primary molding.

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