JP2016203509A - Deposition structure, neutral start switch - Google Patents

Abstract

The present invention provides a welded structure and a neutral start switch in which appropriate welding can be easily obtained.
SOLUTION: A housing portion 5 that houses a switch mechanism, a housing 2 that has a breathing hole 13 that connects the housing portion 5 and the outside, and a GT film 30 that covers the breathing hole 13 are welded to each other. Thus, in the neutral start switch in which the breathing hole 13 is closed, the housing 2 has a textured surface 14 surrounding the breathing hole 13, and the GT film 30 is welded to the housing 2 on the textured surface 14.
[Selection] Figure 3

Description

  The present invention relates to a welded structure and a neutral start switch.

  For example, in a structure having a resinous structure such as a neutral start switch, a porous sheet member having a property of allowing only gas to pass and preventing liquid, dust, etc. from permeating so as to block the breathing hole communicating inside and outside is disposed. A technique for welding a porous sheet member to a structure by applying pressure and heating with a welding jig is well known.

  Patent Document 1 discloses a welding structure in which a plurality of annular ribs project from a surface on which a porous sheet member is welded. Since the pressure and the amount of heat supplied from the welding jig to the structure through the porous sheet member are concentrated on the ribs, welding at a lower pressure and lower temperature than before is possible, and the influence on the porous sheet member is affected by heat. It is suppressed.

Japanese Patent Laid-Open No. 2001-1404

  In the welding structure of Patent Document 1, when uniform contact between the welding jig and the surface formed by the tip of the rib cannot be obtained, a difference occurs in the degree of rib melting. That is, if the structure is not accurately installed on the welding jig, unevenness occurs in the welding. For this reason, there exists a possibility that a breathing hole may not be block | closed with a porous sheet member.

  The present invention has been made in view of such a situation, and an object thereof is to provide a welded structure and a neutral start switch in which appropriate welding can be easily obtained.

  In order to solve the above-described problem, the structure has a hole and a porous sheet member covering the hole, and the structure and the porous sheet member are welded to form the hole. In the welded structure in which the portion is closed, the structure has a textured surface surrounding the periphery of the hole, and the porous sheet member is welded to the structure on the textured surface. The gist.

  When the structure and the porous sheet member are welded on the mirror-finished surface or the surface composed of the vertices of the ribs, the welding jig that pressurizes and heats both of them must be in contact with the entire surface to be welded. In this case, since uneven welding occurs, it is difficult to close the hole with the porous sheet member. That is, if the structure is not accurately arranged with respect to the welding jig, appropriate welding between the structure and the porous sheet member cannot be obtained.

  In that respect, according to this configuration, the structure has a textured surface and is welded to the porous sheet member on the textured surface. Since the textured surface is composed of fine irregularities called textures, it is easy to obtain contact between a part of the textured surface and the welding jig so as to surround the hole. Therefore, as compared with the conventional example as in the above example, since the arrangement accuracy of the structure with respect to the welding jig is relaxed, it is easy to obtain appropriate welding.

  Further, in the structure having this configuration, at the start of welding, each of the embossments and the welding jig are in contact with each other with the porous sheet member interposed therebetween. That is, compared with the conventional case, the area where the welding jig and the structure are in contact with each other is small, and the heat from the welding jig is concentrated on the texture. For this reason, the structure and the porous sheet member can be welded at a lower temperature than in the past. Thereby, the influence on the porous sheet member by heat is suppressed.

The said structure WHEREIN: It is preferable that the said textured surface has the welding implementation surface welded with the said porous sheet member, and the non-welding surface continuous inside the said welding implementation surface.
According to this configuration, the progress of burrs that occur when the structure and the porous sheet member are welded is suppressed by the non-welded surface. Thereby, it is suppressed that a burr | peel enters into a hole part and the internal diameter of a hole part becomes narrow or a hole part is obstruct | occluded.

  In order to solve the above-mentioned problem, a housing having a housing for housing a switch mechanism that switches contacts in response to an operation of a select lever, a housing having a breathing hole that connects the housing to the outside, and a porous sheet that covers the breathing hole In the neutral start switch in which the breathing hole is closed by welding the housing and the porous sheet member, the housing has a textured surface surrounding the breathing hole. The gist is that the porous sheet member is welded to the housing on the textured surface.

  According to this configuration, appropriate welding between the housing and the porous sheet member can be easily obtained. Moreover, the influence on the porous sheet member by heat is also suppressed.

  The welding structure and the neutral start switch of the present invention have an effect that appropriate welding is easily obtained.

The top view of a neutral start switch. (A) is a top view which shows the breathing part before GT film welding, (b) is sectional drawing in the cross-section instruction line AA in (a), (c) is the partially expanded view of (b). (A) is a top view which shows the breathing part after GT film welding, (b) is sectional drawing in the cross-section instruction line AA in (a), (c) is the partially expanded view of (b). Photo showing burrs generated during welding.

Hereinafter, an embodiment of a neutral start switch embodying a welding structure according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the neutral start switch 1 has a housing 2 made of a thermoplastic resin material having electrical insulation. The housing 2 is formed in a sector shape and a column shape. In the housing 2, a manual shaft 4 that rotates in conjunction with a select lever (not shown) that is operated by a user is inserted through a oil seal (not shown) in a portion that is the main part of the fan. The manual shaft 4 is rotatable relative to the housing 2. The manual shaft 4 is connected to an automatic transmission (transmission) (not shown). The gear combination of the mission is switched by the rotation of the manual shaft 4. The housing 2 corresponds to a structure.

  As shown in FIGS. 2B and 3B, a housing portion 5 is formed inside the housing 2. The accommodating portion 5 is provided with a switch mechanism (not shown) in which the contact is switched by the rotation of the previous manual shaft 4. The switch mechanism has a movable contact that rotates in conjunction with the manual shaft 4 and a fixed contact provided on the substrate.

  As shown in FIG. 1, a rectangular connector socket 6 is provided in the housing 2 at a central portion along the fan, that is, at 12 o'clock with respect to the manual shaft 4. The connector socket 6 is connected to the previous board. The connector socket 6 is connected to a control unit that switches display of a vehicle meter (not shown) via a cable (not shown).

  When the user operates the select lever, the manual shaft 4 rotates. As a result, the gear combination of the automatic transmission is switched, and the contact in the switch mechanism is switched. The substrate generates an electrical signal corresponding to the contact of the switch mechanism. This electrical signal is sent to the control unit via the connector socket 6. The control unit notifies the user of the operation position of the select lever, that is, the mission selection information through the meter.

  As shown in FIG. 1, a breathing unit 7 is provided on the fan surface of the housing 2. The breathing unit 7 is provided at the 10 o'clock position with respect to the manual shaft 4. As shown in FIGS. 2B and 3B, the breathing unit 7 includes a base unit 10 formed integrally with the housing 2, a cap 20 (see FIG. 1) covering the base unit 10, and Gore-Tex. Film (hereinafter referred to as GT film) 30.

  As shown in each of FIGS. 2A to 2C and FIGS. 3A to 3C, the base portion 10 includes a cylindrical portion 11 and a mounting portion that is recessed at the distal end portion of the cylindrical portion 11. 12. An inner diameter portion of the cylindrical portion 11 is a breathing hole 13 that connects the housing portion 5 and the attachment portion 12. The breathing hole 13 corresponds to a hole.

  The attachment portion 12 is an annular shape. The bottom surface of the mounting portion 12 is a textured surface 14 that is textured to form a number of irregularities (textures). Desirably, the height of each texture forming the textured surface 14 and the spacing between adjacent textures are non-uniform. The textured surface 14 includes a welding surface 15 that is welded to the GT film 30 and a non-welding surface 16 that is continuous with the inside of the welding surface 15. There is no physical configuration that clearly distinguishes between the welding surface 15 and the non-welding surface 16.

  The GT film 30 is a porous sheet member having a property of allowing only gas to pass therethrough and not allowing liquid, dust or the like to pass therethrough. The GT film 30 is pressed and heated on the textured surface 14 by a welding jig 8 having a cylindrical tip. By the pressurization and heating, the melted resin material of the welding surface 15 (attachment portion 12) enters the hole of the GT film 30 and solidifies, so that the GT film 30 and the attachment portion 12 (housing 2) Is welded.

Next, the effect | action concerning welding of the GT film 30 is demonstrated.
As shown in FIG. 3B, the GT film 30 is pressed and heated to the embossed surface 14 (welding surface 15) by the welding jig 8 having a cylindrical tip. As a result, the housing 2 and the GT film 30 are welded on the textured surface 14 (welding surface 15). At this time, since the textured surface 14 is constituted by fine irregularities called textures, contact between a part of the textured surface 14 and the welding jig 8 so as to surround the breathing hole 13 is obtained. Cheap.

  In this example, a non-welding surface 16 is provided inside the welding surface 15. For this reason, as shown in FIG. 4, the inward progress of the burr 40 that occurs when the housing 2 and the GT film 30 are welded is hindered by the single embossing that forms the non-welding surface 16.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The embossed surface 14 on which the GT film 30 is welded is provided on the housing 2. The textured surface 14 covers the periphery of the breathing hole 13. Since the textured surface 14 is configured by fine irregularities called textures, it is easy to obtain contact between a part of the textured surface 14 and the welding jig 8 so as to surround the breathing hole 13. Thereby, appropriate welding of the housing 2 and the GT film 30 is obtained. Further, by the welding, the neutral start switch 1 can suppress the entry of liquid, dust, and the like into the accommodating portion 5 through the breathing hole 13 and can breathe through the breathing hole 13.

  (2) Further, since the area where the welding jig 8 and the housing 2 are in contact with each other is small, heat concentrates on the texture. For this reason, the housing 2 and the GT film 30 at a lower temperature can be welded. Thereby, the influence on the GT film 30 by heat is suppressed.

  (3) The textured surface 14 includes a welding surface 15 to which the GT film 30 is welded and a non-welding surface 16 on the inside. For this reason, the inward progress of the burrs generated when the housing 2 and the GT film 30 are welded is hindered by each of the textures constituting the non-welding surface 16. Thereby, it is suppressed that the burr enters the breathing hole 13 and the inner diameter of the breathing hole 13 becomes narrow or the breathing hole 13 is blocked.

In addition, you may change the said embodiment as follows.
In the above embodiment, the non-welding surface 16 may be omitted. In this case, the embossed surface 14 as a whole becomes the welding surface 15. Even in such a configuration, the effects (1) and (2) of the above embodiment can be obtained.

  -In the said embodiment, the formation method of the textured surface 14 is not ask | required. That is, the textured surface 14 may be formed on the die-cut housing 2 by physical processing such as sandblasting or polishing processing that does not have a mirror finish. Further, the embossed surface 14 may be formed by punching using a die that has been chemically processed such as etching.

In the above embodiment, the cap 20 may be omitted.
In the above embodiment, the GT film 30 has been described as the porous sheet member. However, any porous sheet member may be used as long as it has a property of allowing only gas to pass through and not allowing liquid, dust, or the like to pass through.

  In the above embodiment, the neutral start switch 1 is described as a welded product, but the present invention can be applied to other types.

DESCRIPTION OF SYMBOLS 1 ... Neutral start switch, 2 ... Housing, 4 ... Manual shaft, 5 ... Housing part, 6 ... Connector socket, 7 ... Breathing part, 8 ... Welding jig, 10 ... Base part, 11 ... Cylindrical part, 12 ... Mounting part , 13 ... breathing hole, 14 ... textured surface, 15 ... welding surface, 16 ... non-welding surface, 20 ... cap, 30 ... GORE-TEX film, 40 ... burr.

Claims (3)

A welded structure that has a structure having a hole and a porous sheet member that covers the hole, and the structure and the porous sheet member are welded to block the hole. In
The structure has a textured surface surrounding the periphery of the hole,
The porous sheet member is a welded structure that is welded to the structure on the textured surface. The welded structure according to claim 1,
The said textured surface is a welding structure which has the welding implementation surface welded with the said porous sheet member, and the non-welding surface continuous inside the said welding implementation surface. A housing portion that houses a switch mechanism that switches contacts in response to the operation of the select lever, a housing that has a breathing hole that connects the housing portion and the outside, and a porous sheet member that covers the breathing hole, In the neutral start switch in which the breathing hole is closed by welding the housing and the porous sheet member,
The housing has a textured surface surrounding the breathing hole;
The porous sheet member is a neutral start switch that is welded to the housing on the textured surface.