TW201330037A - Contact member - Google Patents

Abstract

This invention provides a contact member, utilized in an operating section of an electrical equipment that requires large motion stroke, which functions as part of a switch by being mounted on an electric circuit board integrated into the electrical equipment, and which constitutes a switch having a large motion stroke and a stable contact state. The contact member comprises an electrically conductive case having a receiving section formed by a bottom plate and a side wall, and a resiliently deformable pressing member. The bottom plate has an opening wherein a tongue extending in a direction inclined with respect to the upward extending direction is formed. The pressing member consists of a base section located within the receiving section, an application section on which pressing force from outside is applied, and a deformation section that connects the base section and the application section. By such a construction of the pressing member, when a pressing force from outside is applied on the application section, the deformation section deforms, and the application section presses the tongue to make the latter displace downwards so as to obtain a large motion stroke.

Description

Contact member

The present invention relates to a contact member that constitutes a switch by being mounted on a circuit board, and is composed of a conductive housing and an elastically deformable pressing member.

The switch 100 shown in FIG. 8 is a switch for an operation portion that requires a large operation stroke and a stable contact state. The switch 100 is composed of a member 001, which integrally forms a terminal 002 having conductivity and is made of a molding material, and a contact surface of the conductive terminal 002 is exposed at an opening of the housing 001. The contact piece 003 is formed such that the tongue of the central portion is separated from the terminal 002 when the terminal 002 is placed on the outer peripheral portion; the elastic body 004 has a hollow mortar shape on the inner side, and the pedestal portion is placed on the contact piece 003. And an action portion for receiving a pressing force is formed at a top portion thereof; and a key body 005 is fitted to the housing 001 so as to be slidable in the up and down direction; in operation, by applying a pressing force on the top surface of the key body 005 And the action portion of the elastic body 004 is displaced downward by a large stroke, and the tongue of the contact piece 003 is pressed, thereby passing through the contact piece 003, and the terminal having the central contact integrally formed in the case 001 is A terminal having an outer contact on the outer side of the center contact, that is, an electrical short circuit, and the switch is turned ON.

[Practical Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4209222

However, in the conventional switch 100, although a single switch that can achieve an ON-OFF action can be obtained, when the switch 100 is assembled in an electric device, it is necessary to mount the circuit board for the switch 100 (not shown). Show) and press the key top of the key body 005 (not shown). Further, the switch 100 is composed of a casing 001, a contact piece 003, an elastic body 004, and a key body 005 which are integrally formed with the terminal 002, and has five parts, so that a large part cost and assembly cost are incurred. Further, since the operation stroke is large, the sliding distance between the casing 001 and the key body 005 is also increased, and there is a problem that the sliding operation is easily hindered by dust or the like.

The present invention has been made in view of the above problems, and an object thereof is to provide a contact member which can constitute a switch which is constructed with a small number of parts and which can smoothly move even with a large movement stroke. The acquisition does not pose a problem, and is similar to the conventional switch 100 when assembled into an electric device, and the ON-OFF operation can be performed only by the circuit board and the key top for mounting.

In order to solve the conventional problem, the contact member described in claim 1 is composed of the following parts: an electrically conductive housing forming a housing portion with a bottom plate and a side wall, and an elastically deformable pressing member. In the contact member, the bottom plate is formed with: an opening portion and a tongue protruding from the receiving portion; the pressing member includes: a pedestal portion placed on the bottom plate; and an action portion receiving a pressing force applied from the outside And a deformation portion extending from the pedestal portion and connected to the operation portion; the deformation portion is deformed by applying a pressing force to the operation portion, and the operation portion presses the tongue piece, and the tongue piece passes through the opening The portion can protrude to the outside of the housing portion.

The contact member described in claim 2 is in the configuration described in the first item of the patent application, and the following technical feature is added: the side wall forms a folded-back portion in which the upper end portion is folded back toward the inner side of the receiving portion, and The folded-back portion maintains the accommodating state of the pressing member toward the accommodating portion.

The contact member described in item 3 of the patent application is the first or second item of the patent application scope. In the above configuration, the following technical feature is added to form a mounting welded portion that protrudes to the outside of the accommodating portion.

The contact member according to claim 4, in the composition of any one of claims 1 to 3, further comprising the following technical feature: on the opposite side of the bottom plate from the receiving portion Insulation treatment is applied to the surface.

The contact member described in claim 5 is applied to any one of the claims 1 to 4, and the following technical feature is added: the tongue is composed of the following parts: a tongue wrist a portion extending from the bottom plate; and a contact piece projecting from the tongue portion and being pressed by the action portion; and the contact piece is formed with at least one contact protrusion protruding toward the opening portion.

According to the invention of claim 1, since the contact member can be formed only by the electrically conductive housing having the accommodating portion and the elastically deformable pressing member, the component cost and assembly cost can be achieved. Further, the stroke of the pressing member can be easily increased, and the stroke can be easily increased, so that the stroke can be set freely. Further, the electric device can be provided with a circuit board for mounting the contact member and a key top for pressing, thereby forming a switch capable of performing an ON-OFF operation.

According to the invention of claim 2, by folding the end portion of the side wall inwardly, the pedestal portion of the pressing member does not pass over the folded portion and beyond the outer side of the accommodating portion, thereby preventing the conveyance from being obtained, etc. An accident occurs in which the pressing member is detached from the accommodating portion.

According to the invention of claim 3, since the bottom plate is formed with the welding portion for protruding outward, the flux generated during the soldering installation can be prevented from entering the housing portion in which the pressing member is housed, and the mounting portion is used for mounting. When the welded portion is welded, the solder fillet can be surely formed, and a large mounting strength can be obtained.

According to the invention of claim 4, since the surface on the side opposite to the accommodating portion of the bottom plate, that is, the surface on the circuit board side of the bottom plate, is insulated, it is not necessary to apply insulation treatment to the circuit pattern of the circuit board. Wiring arrangement of high degree of freedom circuit pattern.

According to the invention of claim 5, since the tongue piece is composed of the tongue piece and the contact piece, the elastic force setting of the tongue piece can be easily performed, and the contact protrusion which protrudes toward the opening part is formed in the contact piece. When the contact member is mounted on the circuit board, the contact between the contact protrusion and the contact pattern formed on the circuit board is more sure, and the contact performance of the switch can be improved, and the switch is configured to be mounted on the circuit board.

01‧‧‧Contact member

001, 10‧‧‧ shell

002‧‧‧terminal

003, 14‧‧‧Contacts

004‧‧‧ Elastomer

005‧‧‧ key body

11‧‧‧floor

12‧‧‧ openings

13‧‧‧ tongue

15‧‧‧ tongue wrist

16‧‧‧Ring position determines the convex part

17‧‧‧Contact convex

18‧‧‧ Housing Department

19‧‧‧Fold back

20‧‧‧ side wall

21‧‧‧Installation welding department

22‧‧‧ nicks

30‧‧‧ Pushing members

31‧‧‧Deputy Department

32‧‧‧Action Department

33‧‧‧Deformation Department

34‧‧‧Pushing Department

35‧‧‧ pedestal underside

36‧‧‧ Pushing surface

37‧‧‧ inside space

40‧‧‧ circuit board

41‧‧‧Central contact

43‧‧‧Installation Department

100‧‧‧ switch

Fig. 1 is a front perspective view of a contact member of the present invention.

Fig. 2 is an exploded front perspective view of the contact member of the present invention.

Fig. 3 is an exploded front perspective view showing a contact member and a circuit board of the present invention.

Fig. 4 is a front perspective view showing a state in which the contact member of the present invention is mounted on a circuit board.

Fig. 5 is a cross-sectional view taken along line a-a of Fig. 4.

Fig. 6 is a cross-sectional view taken along line a-a of Fig. 4 in a state in which the contact member of the present invention is actuated by a pressing force.

Fig. 7 (a) to (b) are exploded front perspective views of an embodiment of another contact member according to the present invention.

Fig. 8 is an exploded perspective view of a conventional switch.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 7 are front perspective views of a contact member according to the present invention; Fig. 2 is an exploded front perspective view of the contact member of the present invention; and Fig. 3 is a contact member according to the present invention. An exploded front perspective view of the circuit substrate; FIG. 4 is a view of the contact member of the present invention on a circuit board FIG. 5 is a cross-sectional view taken along line aa of FIG. 4; FIG. 6 is a cross-sectional view taken along line aa of FIG. 4 in a state in which the contact member of the present invention is actuated by a pressing force; Figure 7 is an exploded front perspective view of an embodiment of another contact member in accordance with the present invention. The contact member 01 is composed of a housing 10 and a pressing member 30.

The casing 01 is formed by processing a conductive metal plate, and an opening portion 12 that is nearly hollowed out in a concentric shape is formed in the circular bottom plate 11, and a sliced tongue 13 is protruded inward from the opening portion 12. The tongue piece 13 is formed to be inclined toward the direction in which the side wall 20 to be described later is formed, that is, in the upward direction. In the arrow view of the upper direction, the tongue piece 13 is composed of two tongue pieces 15 which are symmetrically formed, and the tongue piece 15 is After the opening 12 is extended, an arc having a substantially concentric shape is drawn from the opening 12, and then the two tongue portions 15 are joined. Then, the contact piece 14 protrudes from the joined portion toward the center of the opening portion 12, and the contact piece 14 is formed at a certain distance from the bottom plate 11 in the upper direction almost in parallel.

Further, the side wall 20 formed almost perpendicularly from the outer circumference of the bottom plate 11 is formed, and the side wall 20 and the bottom plate 11 are formed with the accommodating portion 18 having a substantially cylindrical space. At the upper end portion of the side wall 20, a folded-back portion 19 which is folded back toward the inner side of the accommodating portion 18 and has an angle of less than 90 degrees with respect to the side wall 20 is formed. Further, in the side wall 20, a notch portion 22 having a notch in the upper side is formed from the bottom plate 11 which is the starting point of the formation, and the mounting portion 21 is formed in the notch portion 22 from the bottom plate 11, and is formed in the same plane as the bottom plate 11 and is formed in the receiving portion 18 The outside is extended. Further, around the opening portion 12 of the bottom plate 11, in order to maintain the position of the pressing member 30 to be described later, the convex portion 16 is formed in an annular position formed in a convex shape above.

The pressing member 30 is made of an elastic material such as rubber, has a certain thickness, and is formed in an annular pedestal portion 31 having a shape slightly smaller than the outer shape of the bottom plate 11 of the casing 10, and has a flat surface with respect to the top surface. The slightly cylindrical action portion 32 of the pressing surface 36 is connected by the deformed portion 33 formed of a thin wall, and as a whole shape, a space in which the space of the mortar is vertically opposed is formed inside. Then, a pressing portion 34 that is close to the space 37 on the inner side is protruded from the surface on the opposite side of the pressing surface 36.

Next, the assembly and mounting of the contact member 01 of the above-described constituent components to the circuit board 40 will be described. The contact member 01 is completed by assembling the pressing member 30 to the casing 10. When the pedestal portion 31 of the pressing member 30 is bent, the folded portion 19 is turned over, and the pedestal bottom surface 35 of the pedestal portion 31 is placed on the bottom plate 11, and the pressing member 30 is housed in the accommodating portion 18. Thereby, the top surface of the pedestal portion 31 is positioned at the same height or slightly lower side than the lower end portion of the folded-back portion 19, and the pedestal portion 31 cannot pass over the folded-back portion 19 due to the folded portion 19 (barrier). In other words, since the pressing member 30 cannot be separated from the accommodating portion 18, it is possible to prevent an accident such as dropping of the pressing member 30 from the accommodating portion 18 during transportation or the like during assembly and acquisition.

Then, when the completed contact member 01 is assembled to the electric device, the circuit board 40 provided in the electric device shown in FIGS. 3 to 6 is attached, whereby the state in which the circuit board is included functions as a switch.

In the circuit board 40, a solderable circuit pattern, that is, a mounting portion 43 is formed at a position corresponding to the mounting soldering portion 21 of the contact member 01, and a contact piece which is independent of the mounting portion 43 is formed at a position corresponding to the contact piece 14. The circuit pattern of the contact, that is, the central contact 41, can be connected to the circuit board by soldering the mounting portion 21 of the contact member 01 to the mounting portion 43 to complete the mounting of the contact member 01 to the circuit substrate, thereby contacting The sheet 14 is located just above the central joint 41 and is located at this position. Further, at this time, since the circuit pattern extending from the center contact 41 is disposed under the bottom plate 11 and is in contact with the bottom plate 11, the surface of the corresponding circuit pattern is subjected to insulation treatment.

The contact member 01 which is completed and mounted in this manner operates as follows. As shown in FIGS. 5 and 6, first, a pressing force is applied to the top surface of the action portion 32 of the pressing member 30 through the top of the key provided in the electric device. Thereby, the action portion 32 is displaced downward while the deformation portion 33 is elastically deformed, and the pressing portion 34 abuts against the contact piece 14 and further applies a pressing force, and the contact piece 14 is accompanied by the lower side of the tongue piece 13. The central contact 41 of the circuit board 40 is elastically deformed, and finally, the contact protrusion 17 projecting downward in the direction of the center contact 41 of the contact piece 14 contacts the center contact 41.

As a result, the central contact 41 of the circuit board 40 and the mounting portion 43 pass through the casing 10 made of a conductive metal plate to achieve a short circuit in the circuit, and the switch of the configuration is turned ON by the contact member 01 and the circuit board 41. status.

Thus, although the contact member 01 of the present invention is constituted only by the casing 01 and the pressing member 30, it can function as a part of the configuration of the switch only by being attached to the circuit board. Further, a large operation stroke can be performed by using the pressing member 30.

Further, by changing the shape and material of the pressing member 30, the operation stroke and the operating load can be freely set.

Further, in the above embodiment, the housing 10 and the accommodating portion 18 used in the present contact member 01 have a slightly cylindrical shape, but are not limited thereto, and may be used as shown in FIG. 7 (a). The accommodating portion shown in the present invention has a slightly cubic shape or a slightly rectangular shape, and the accommodating portion shown in FIG. 7(b) has a slightly polygonal cylindrical shape, and the pressing member also corresponds to the aforementioned various shells. The shape of the body can also be used as the contact member of the present invention.

10‧‧‧shell

11‧‧‧floor

12‧‧‧ openings

13‧‧‧ tongue

14‧‧‧Contact film

15‧‧‧ tongue wrist

16‧‧‧Ring position determines the convex part

17‧‧‧Contact convex

18‧‧‧ Housing Department

19‧‧‧Fold back

20‧‧‧ side wall

21‧‧‧Installation welding department

22‧‧‧ nicks

30‧‧‧ Pushing members

31‧‧‧Deputy Department

32‧‧‧Action Department

33‧‧‧Deformation Department

35‧‧‧ pedestal underside

36‧‧‧ Pushing surface

Claims (5)

A contact member is composed of a conductive housing, a receiving portion formed by a bottom plate and a side wall, and an elastically deformable pressing member; wherein the connecting member is formed in the bottom plate: an opening portion; and a tongue piece, The pressing member includes: a pedestal portion placed on the bottom plate; an operating portion receiving a pressing force applied from the outside; and a deforming portion extending from the pedestal portion and connected to the operating portion The deformation portion is deformed by applying a pressing force to the operation portion, and the operation portion presses the tongue piece, and the tongue piece can protrude to the outside of the accommodation portion via the opening portion. The contact member according to claim 1, wherein the side wall forms a folded-back portion in which the upper end portion is folded back toward the inner side of the receiving portion, and the folded portion is used to maintain the receiving state of the pressing member toward the receiving portion. . The contact member according to the first or second aspect of the invention, wherein the bottom plate is formed with a soldering portion for mounting to the outside of the housing portion. The contact member according to any one of claims 1 to 3, wherein an insulating treatment is applied to a surface of the bottom plate opposite to the accommodating portion. The contact member according to any one of claims 1 to 4, wherein the tongue is composed of a tongue portion extending from the bottom plate and extending from the tongue portion And a contact piece pressed by the operation unit; and the contact piece is formed with at least one contact protrusion protruding toward the opening.