Press-type microswitch

Abstract

The utility model provides a push type microswitch, and belongs to the technical field of switches. The problems that an existing waist support switch is of a swing rod type structure, operation hand feeling and sound are not consistent with those of a seat adjusting switch, and the operation stroke is large are solved. The press type microswitch comprises a shell, a bottom cover buckled with the shell and an inner shaft arranged in the shell in a sliding mode, a movable contact piece is arranged on the inner shaft, an insert is arranged on the shell, when the inner shaft is pressed inwards, the movable contact piece is in contact with the insert to achieve conduction of a circuit, a rubber cover is arranged on the bottom cover, and the inner end of the inner shaft abuts against the rubber cover. A circuit conduction part adopts a structural form that a movable contact piece is in contact with an insert, so that the large-current requirement is met; the operation hand feeling is provided by the rubber cover, and the rubber cover can be replaced according to the requirements of customers so as to achieve the purpose of specifically adjusting the operation hand feeling and the operation force value.

Description

Technical Field

[0001] This utility model belongs to the field of switch technology and relates to a push-button micro switch. Background Technology

[0002] A lumbar support switch is installed on a car seat to adjust the lumbar support. For example, Chinese patent [Application Publication No. CN119170433A] discloses a two-way adjustment switch and a car seat adjustment switch assembly, including a base and a top cover. Normally open and normally closed terminals are riveted to both sides of the front end of the base, and a middle terminal is riveted to both sides of the rear end of the base. Stationary contacts are riveted to the inner sides of the normally open and normally closed terminals. A C-shaped bracket is integrally formed on the upper end of the middle terminal, and a moving contact is fixed to the C-shaped bracket through V-shaped grooves at both ends. When the first operating lever swings left and right, it drives a U-shaped push plate to slide left and right, causing the U-shaped push plate to press against the moving contact, thereby making contact between the moving contact and the stationary contact on the normally open terminal, thus switching the circuit.

[0003] The aforementioned switch is a lever-type micro switch, and its operating feel and sound are inconsistent with the seat adjustment switch; the large operating stroke results in a large gap between the operating lever and the top cover, affecting the aesthetics. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a push-type micro switch that provides a tactile feel.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A push-button micro switch includes a housing, a bottom cover that is fastened to the housing, and an inner shaft that is slidably disposed within the housing. The inner shaft is provided with a movable contact piece, and the housing is provided with an insert. When the inner shaft is pressed inward, the movable contact piece contacts the insert to achieve circuit conduction. The bottom cover is provided with a rubber cover, and the inner end of the inner shaft abuts against the rubber cover.

[0007] The circuit conduction section adopts a structure where a moving contact plate contacts an insert, and the maximum rated current can meet 5A and 24V DC power. The micro switch is opened and closed by sliding the moving contact plate up and down. The operating feel is provided by a rubber cover, which can be replaced according to customer requirements to achieve targeted adjustment of the operating feel and operating force.

[0008] In the aforementioned push-button micro switch, the moving contact has a first spring and a second spring, and the insert includes a first stationary contact and a second stationary contact extending along the movement direction of the inner axis. The upper end of the first stationary contact is higher than the upper end of the second stationary contact. In the open state, the first spring abuts against the first stationary contact, and the second spring abuts against the inner surface of the housing. In the closed state, the first spring abuts against the first stationary contact, and the second spring abuts against the second stationary contact.

[0009] The first and second spring contacts are integrated. Under the action of elastic force, the first spring contact is always in contact with the first stationary contact, and the second spring contact is always in contact with the second stationary contact / inner surface of the housing. When the inner shaft is not pressed, the microswitch is in the open state; when the inner shaft is pressed, the microswitch is in the closed state. The first stationary contact, the second stationary contact, the first spring contact, and the second spring contact are all made of conductive material. The first and second stationary contacts are each connected to different wires. When the first spring contact is in contact with the first stationary contact and the second spring contact is in contact with the second stationary contact, the wires are connected, and the microswitch becomes closed.

[0010] In the aforementioned push-button micro switch, the insert further includes a third stationary contact extending along the movement direction of the inner shaft, the second stationary contact being located between the first and third stationary contacts, and the upper part of the third stationary contact having an abutment portion located above the second stationary contact, wherein the second spring contact abuts against the abutment portion when in the open state.

[0011] The third stationary contact piece is made of metal to prevent the second spring piece from directly contacting the inner surface of the housing, thus reducing wear on the housing.

[0012] In the aforementioned push-button micro switch, the housing includes an upper cover and a lower cover that is fastened to the upper cover, and the insert and the lower cover are formed by secondary injection molding.

[0013] In the aforementioned push-type micro switch, the lower cover has two opposing first lugs, and an assembly space is formed between the two first lugs. The upper cover has a mating part that cooperates with the assembly space. The mating part has first limiting protrusions on both sides. The first lugs have first latches that correspond to the first limiting protrusions. When connected, the first limiting protrusions are engaged in the first latches.

[0014] It facilitates the installation of the internal structure and the assembly of the casing.

[0015] In the aforementioned push-button micro switch, the bottom cover has two opposing second lugs, and the housing has two recessed cavities into which the second lugs extend. Each recessed cavity contains a second limiting protrusion, and the second lug has a second latch corresponding to the second limiting protrusion. During connection, the second limiting protrusion engages with the second latch. This facilitates the installation of internal structures such as rubber covers and makes assembly convenient.

[0016] In the aforementioned push-button micro switch, one of the clearance chambers is located on the side of the upper cover away from the lower cover, and the other clearance chamber is located on the side of the lower cover away from the upper cover.

[0017] In the aforementioned push-button micro switch, the inner shaft has a groove in which the moving contact is embedded. The inner shaft is made of insulating material, and the moving contact is installed by an embedded method, which facilitates installation.

[0018] Compared with existing technologies, this push-button micro switch has the following advantages:

[0019] The circuit conduction section adopts a structure in which a moving contact piece contacts an insert to meet high current requirements; the operating feel is provided by a rubber cover, which can be replaced according to customer requirements to achieve targeted adjustment of the operating feel and operating force; the structure is reasonably designed, easy to assemble, and has good performance; the operating feel and sound are consistent with the seat adjustment switch. Attached Figure Description

[0020] Figure 1 This is an exploded view of the push-button micro switch provided by this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the insert provided by this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the moving contact provided by this utility model.

[0023] In the figure, 11 is the upper cover; 111 is the mating part; 112 is the first limiting protrusion; 12 is the lower cover; 13 is the clearance cavity; 131 is the second limiting protrusion; 121 is the first lug; 122 is the first latch; 2 is the bottom cover; 21 is the second lug; 22 is the second latch; 3 is the inner shaft; 31 is the groove; 4 is the moving contact piece; 41 is the first spring piece; 42 is the second spring piece; 5 is the rubber cover; 6 is the insert; 61 is the first stationary contact piece; 62 is the second stationary contact piece; 63 is the third stationary contact piece; 631 is the abutment part. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1 The push-button micro switch shown includes a housing, a bottom cover 2 that is fastened to the housing, and an inner shaft 3 that slides up and down inside the housing.

[0026] like Figure 1As shown, the housing includes an upper cover 11 and a lower cover 12 that is fastened to the upper cover 11. The lower cover 12 has two opposing first lugs 121, and an assembly space is formed between the two first lugs 121. The upper cover 11 has a mating part 111 that mates with the assembly space. The mating part 111 has first limiting protrusions 112 on both sides. The first lugs 121 have first latches 122 that correspond to the first limiting protrusions 112. When connected, the first limiting protrusions 112 are fastened into the first latches 122.

[0027] like Figure 1 As shown, the bottom cover 2 has two opposing second lugs 21, and the housing has two recessed cavities 13 into which the second lugs 21 extend. Each recessed cavity 13 contains a second limiting protrusion 131, and each second lug 21 has a second latch 22 corresponding to the second limiting protrusion 131. During connection, the second limiting protrusion 131 engages with the second latch 22. Specifically, one recessed cavity 13 is located on the side of the upper cover 11 away from the lower cover 12, and the other recessed cavity 13 is located on the side of the lower cover 12 away from the upper cover 11.

[0028] The inner shaft 3 is provided with a movable contact piece 4, and the housing is provided with an insert 6. When the inner shaft 3 is pressed inward, the movable contact piece 4 contacts the insert 6 to realize the conduction of the circuit. The bottom cover 2 is provided with a rubber cover 5, and the lower end of the inner shaft 3 abuts against the rubber cover 5.

[0029] like Figure 1 As shown, the inner shaft 3 is provided with a groove 31, and a movable contact piece 4 is embedded in the groove, such as... Figure 3 As shown, the movable contact 4 has a first spring 41 and a second spring 42.

[0030] The lower cover 12 has an insert 6 formed by secondary injection molding, such as... Figure 2 As shown, the insert 6 includes a first stationary contact piece 61 and a second stationary contact piece 62 extending along the movement direction of the inner shaft 3. The upper end of the first stationary contact piece 61 is higher than the upper end of the second stationary contact piece 62. In the open state, the first spring piece 41 abuts against the first stationary contact piece 61, and the second spring piece 42 abuts against the inner surface of the housing. In the closed state, the first spring piece 41 abuts against the first stationary contact piece 61, and the second spring piece 42 abuts against the second stationary contact piece 62.

[0031] like Figure 2 As shown, the insert 6 also includes a third stationary contact 63 extending along the movement direction of the inner shaft 3. The second stationary contact 62 is located between the first stationary contact 61 and the third stationary contact 63. The upper part of the third stationary contact 63 has an abutment portion 631 located above the second stationary contact 62. When in the open state, the second spring 42 abuts against the abutment portion 631.

[0032] The first spring 41 and the second spring 42 are connected as one unit. Under the action of elastic force, the first spring 41 is always in contact with the first stationary contact 61, and the second spring 42 is always in contact with the second stationary contact 62 / abutment part 631. When the inner shaft 3 is not pressed, the micro switch is in the open state. After the inner shaft 3 is pressed, the micro switch is in the closed state.

[0033] In this embodiment, the first stationary contact 61, the second stationary contact 62, the first spring 41, and the second spring 42 are made of conductive materials. The first stationary contact 61 and the second stationary contact 62 are respectively connected to different wires. When the first spring 41 contacts the first stationary contact 61 and the second spring 42 contacts the second stationary contact 62, the wires are connected and the micro switch becomes closed.

[0034] The circuit conduction section adopts a structure in which the moving contact 4 contacts the insert 6, and the maximum rated current can meet 5A, 24V DC power. The micro switch is opened and closed by sliding the moving contact 4 up and down. The operating feel is provided by the rubber cover 5, and the rubber cover 5 can be replaced according to customer requirements to achieve targeted adjustment of the operating feel and operating force.

[0035] During assembly, the moving contact piece 4 is inserted into the groove 31 of the inner shaft 3, and then the inner shaft 3 is slidably fitted into the upper cover 11. Then, the lower cover 12 with the insert 6 is fastened to the upper cover 11, the rubber cover 5 is rotated into the bottom cover 2, and finally the bottom cover 2 is fastened to the housing.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A push microswitch, characterized by, The device includes a housing, a bottom cover (2) that is fastened to the housing, and an inner shaft (3) that is slidably disposed within the housing. The inner shaft (3) is provided with a movable contact piece (4), and the housing is provided with an insert (6). When the inner shaft (3) is pressed inward, the movable contact piece (4) contacts the insert (6) to achieve circuit conduction. The bottom cover (2) is provided with a rubber cover (5), and the inner end of the inner shaft (3) abuts against the rubber cover (5).

2. The push micro switch according to claim 1, characterized by The movable contact (4) has a first spring (41) and a second spring (42). The insert (6) includes a first stationary contact (61) and a second stationary contact (62) extending along the movement direction of the inner shaft (3). The upper end of the first stationary contact (61) is higher than the upper end of the second stationary contact (62). In the open state, the first spring (41) abuts against the first stationary contact (61), and the second spring (42) abuts against the inner surface of the housing. In the closed state, the first spring (41) abuts against the first stationary contact (61), and the second spring (42) abuts against the second stationary contact (62).

3. The push microswitch according to claim 2, wherein The insert (6) further includes a third stationary contact piece (63) extending along the movement direction of the inner shaft (3), the second stationary contact piece (62) being located between the first stationary contact piece (61) and the third stationary contact piece (63), the upper part of the third stationary contact piece (63) having an abutment portion (631) located above the second stationary contact piece (62), and the second spring piece (42) abutting against the abutment portion (631) when in the open state.

4. The push micro switch according to claim 1, wherein The housing includes an upper cover (11) and a lower cover (12) that is fastened to the upper cover (11). The insert (6) and the lower cover (12) are formed by secondary injection molding.

5. The push microswitch according to claim 4, wherein The lower cover (12) has two opposing first lugs (121), and an assembly space is formed between the two first lugs (121). The upper cover (11) has a mating part (111) that cooperates with the assembly space. The mating part (111) has a first limiting protrusion (112) on each side. The first lug (121) has a first latch (122) that corresponds to the first limiting protrusion (112). When connected, the first limiting protrusion (112) is engaged in the first latch (122).

6. The push microswitch according to claim 4, wherein The bottom cover (2) has two opposing second lugs (21), and the housing has two relief cavities (13) for the second lugs (21) to extend into. The relief cavity (13) is provided with a second limiting protrusion (131), and the second lug (21) has a second latch (22) corresponding to the second limiting protrusion (131). When connected, the second limiting protrusion (131) is fastened in the second latch (22).

7. The push microswitch according to claim 6, wherein One of the relief cavities (13) is located on the side of the upper cover (11) away from the lower cover (12), and the other relief cavity (13) is located on the side of the lower cover (12) away from the upper cover (11).

8. The push microswitch according to claim 1, wherein The inner shaft (3) is provided with a groove (31), and the movable contact piece (4) is embedded in the groove (31).

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