Self-resetting key switch

Abstract

The utility model discloses a self-resetting key switch, which mainly solves the problems of complex structure, large volume and high cost of the conventional self-resetting key switch. The self-resetting key switch comprises a resetting type travel switch of which the bottom is welded on a circuit board of the fire alarm controller, a rocker turntable fixed with the resetting type travel switch, and a surface cover which is buckled on the surface of the fire alarm controller and is used for packaging the resetting type travel switch and the rocker turntable, and the key penetrates through the surface cover and is matched with the rocker turntable for use. Through the design, the rocker rotating disc is ingeniously applied to drive the reset type travel switch to rotate to achieve opening and resetting of the self-reset key switch, the structure is simple, compared with a self-reset key switch in the market, the design and manufacturing process is greatly simplified, and the sizes of the self-reset travel switch and the rocker rotating disc are very small. And the space of the fire alarm controller is not occupied.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fire fighting equipment, and particularly relates to a self-resetting key switch. BACKGROUND

[0002] The self-resetting key switch is widely applied to the fields of medical equipment, instruments and meters and numerical control lathes in recent years due to its long mechanical service life, good stability, good impact resistance and reliable quality. The fire fighting industry is also developing simultaneously with the development of various fields. The national standard GB4717 "Fire Alarm Controller" released recently provides that "the controller should have manual and automatic control functions, and manual state indicator lamp and automatic state indicator lamp should be arranged. The manual and automatic control state conversion should adopt the self-resetting key switch operation". The fire fighting industry also begins to introduce the application of the self-resetting key switch. However, the existing self-resetting key switch has the problems of complex structure, large size and high cost. Due to the complex structure of the self-resetting key switch, a large size is required for installing the self-resetting key switch, so that the structure of the switch can be accommodated, which leads to the need for reserving a large position for the fire alarm controller during the design of the fire alarm controller, the thickness of the controller is increased, and due to the relatively small number of manufacturers and high cost, the cost of the entire fire alarm controller is increased. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a self-resetting key switch, and mainly solves the problems of complex structure, large size and high cost of the existing self-resetting key switch.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A self-resetting key switch, comprising a reset type travel switch welded on a circuit board of a fire alarm controller, a rocker disc fixed with the reset type travel switch, a surface cover buckled on the surface of the fire alarm controller to package the reset type travel switch and the rocker disc, and a key penetrating the surface cover and cooperating with the rocker disc.

[0006] Further, in the utility model, the reset type travel switch comprises a base welded on the circuit board of the fire alarm controller, a sunken circular table arranged on the base, a conductive sheet flatly arranged on the base and penetrating the base for external connection, a positioning shaft arranged at the center of the sunken circular table, and a spring arranged in the sunken circular table and a spring sheet arranged at the bottom of the sunken circular table.

[0007] Furthermore, in this utility model, the top center of the base is recessed downward to form a first opening, the sidewall of the first opening is provided with two limiting platforms, a fixing hole is provided in the center, and multiple through holes are provided at the bottom where it connects with the sidewall; wherein, the limiting platform is used to limit the spring; the fixing hole is used for the positioning shaft to pass through, and the through holes are used for the conductive sheet to pass through the base.

[0008] Furthermore, in this utility model, the conductive sheet includes a first conductive sheet, a second conductive sheet, and a common conductive sheet; wherein, the first conductive sheet and the second conductive sheet are provided with pins at both ends, and the common conductive sheet is provided with a pin at one end, the pin passing through a through hole on the base for external soldering.

[0009] Furthermore, in this utility model, the top and bottom ends of the spring are provided with limiting pins, and the two limiting pins are respectively limited to the opposite side walls of the two limiting platforms.

[0010] Furthermore, in this utility model, the recessed truncated cone has a through hole at its center, a rocker arm on its side to drive the recessed truncated cone to rotate, a cylindrical back, a second opening on its bottom surface, a third opening on its body, a spring piece on the edge of the second opening, and a limiting pin passing through the third opening.

[0011] Furthermore, in this utility model, the rocker turntable includes a turntable body with a positioning hole at the bottom center, a U-shaped claw disposed on the side of the turntable body for fixing to the rocker, a key retainer disposed on the top of the turntable body, and a key slot opened on the key retainer.

[0012] Furthermore, in this utility model, the cover is integrated into the fire alarm controller panel, and the cover has an opening through which a key holder can pass, and a groove around the bottom surface for the rocker arm to move left and right.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) This utility model cleverly uses a rocker turntable to drive the rotation of a reset limit switch to realize the opening and resetting of the self-resetting key switch. The structure is simple and greatly simplifies the design and manufacturing process compared with the self-resetting key switches on the market. Moreover, the self-resetting limit switch and the rocker turntable are very small in size and will not occupy the space of the fire alarm controller.

[0015] (2) In this utility model, the cover of the self-resetting key switch is integrated on the controller panel, which saves costs; and the cost of the limit switch and rocker turntable used is very low, so the cost of the entire self-resetting key switch is also very low, which can effectively reduce the production and manufacturing cost of the entire fire alarm controller. Attached Figure Description

[0016] Figure 1 It is the explosion structure schematic view of the utility model.

[0017] Figure 2 It is the appearance structure schematic view of the reset type travel switch in the utility model.

[0018] Figure 3 It is the front structure schematic view of the rocker turntable in the utility model.

[0019] Figure 4 It is the back structure schematic view of the rocker turntable in the utility model.

[0020] Figure 5 It is the explosion structure schematic view of the reset type travel switch in the utility model.

[0021] Figure 6 It is the assembly structure schematic view of the utility model.

[0022] Among them, the name corresponding to the reference sign is:

[0023] 1-reset type travel switch, 2-rocker turntable, 3-face cover, 4-key, 5-base, 6-sunken round table, 7-positioning shaft, 8-conductive sheet, 9-spring, 10-spring piece, 11-first opening, 12-limiting table, 13-fixing hole, 14-via hole, 15-limiting needle, 16-penetration hole, 17-rocker, 18-third opening, 19-positioning hole, 20-turntable body, 21-U-shaped claw, 22-key fixer, 23-key slot, 24-opening, 25-fire alarm controller panel, 81-first conductive sheet, 82-second conductive sheet, 83-common conductive sheet, 84-lead. DETAILED DESCRIPTION

[0024] The utility model is further explained in connection with the drawings and examples, and the mode of the utility model includes but is not limited to the following examples.

[0025] As Figure 1 The utility model discloses a self-resetting key switch, including the circuit board of bottom welding on fire alarm controller's reset type travel switch 1, with the fixed rocker turntable 2 of reset type travel switch 1, the face cover 3 of being buckled on the surface of fire alarm controller and being used with the rocker turntable 2 of reset type travel switch 1 and rocker turntable 2 are encapsulated, and the key 4 of passing through face cover 3. The key switch utilizes key to realize the opening and reset of switch by rocker.

[0026] As Figures 2 to 6As shown, in this embodiment, the reset limit switch 1 includes a base 5 soldered to the circuit board of the fire alarm controller, a recessed truncated cone 6 disposed on the base 5, a conductive sheet 8 flat against the base and passing through the base for external connection, a positioning shaft 7 disposed at the center of the recessed truncated cone 6, a spring 9 disposed inside the recessed truncated cone 6, and a spring piece 10 disposed at the bottom of the recessed truncated cone 6.

[0027] In this embodiment, the top center of the base 5 is recessed downward to form a first opening 11. The sidewall of the first opening is provided with two limiting platforms 12, a fixing hole 13 in the center, and multiple through holes 14 at the bottom connection with the sidewall. The limiting platforms 12 are used to limit the spring 9 by limiting pins 15 at the top and bottom of the spring 9. The two limiting pins 15 are respectively limited on the opposite sidewalls of the two limiting platforms 12. The fixing hole 13 is used for the passage of the positioning shaft 7. The positioning shaft passes through the through hole 16 of the recessed truncated cone and the internal spring 9, and then through the fixing hole 13 in the center of the base to assemble and fix the components of the entire reset limit switch.

[0028] In this embodiment, the via 14 is provided with 5 ( Figure 5 The two conductive sheets shown in the image, along with the two opposite and one in the middle of the two opposite positions, are used for conductive sheets to pass through the base 5. The conductive sheets 8 include a first conductive sheet 81, a second conductive sheet 82, and a common conductive sheet 83. The first conductive sheet 81 and the second conductive sheet 82 have pins 84 at both ends, and the common conductive sheet 83 has a pin 84 at one end. The common conductive sheet 83 is located between the first conductive sheet 81 and the second conductive sheet 82, and all pins 84 pass through through holes 14 on the base for external soldering.

[0029] In this embodiment, the recessed frustum 6 has a through hole 16 at its center, a rocker arm 17 on its side for rotating the recessed frustum 6, a cylindrical back, a second opening on its bottom surface, a third opening 18 on its body, a spring piece 10 located at the edge of the second opening, and a limiting pin 15 protruding from the third opening 18. The rocker arm turntable 2 includes a turntable body 20 with a positioning hole 19 at its bottom center, a U-shaped claw 21 on the side of the turntable body 20 for fixing the rocker arm 17, a key retainer 22 on the top of the turntable body 20, and a key slot 23 on the key retainer 22. During assembly, the positioning hole 19 is adapted to the positioning shaft 7 on the base 5, and the rocker arm 17 is clamped and fixed by the U-shaped claw 21, thereby fixing the reset limit switch 1 to the rocker arm turntable 2.

[0030] In this embodiment, the cover 3 is integrated into the fire alarm controller panel. The cover 3 has an opening 24 through which a key retainer can pass and a groove around the bottom surface for the rocker arm turntable 2 to move left and right.

[0031] When the reset type travel switch is operated by inserting the key into the rocker disc, the key rotates to drive the rocker disc to rotate in one direction, so that the spring inside the reset type travel switch rotates, and thus the spring sheet inside the reset type travel switch contacts the first conductive sheet and the common conductive sheet, so that the first conductive sheet and the common conductive sheet are conductive, and the spring limit pin automatically restores after reaching the limit table, so that the self-resetting operation of the key switch is realized; the key rotates to drive the rocker disc to rotate in the other direction, so that the spring inside the reset type travel switch rotates, and thus the spring sheet inside the reset type travel switch contacts the second conductive sheet and the common conductive sheet, so that the second conductive sheet and the common conductive sheet are conductive, and the spring limit pin automatically restores after reaching the limit table, so that the self-resetting operation of the key switch is realized.

[0032] The manual and automatic control method of the utility model:

[0033] S1: when the fire alarm controller is in a normal monitoring state, the self-resetting key switch is in an intermediate state (the spring sheet is only at the position of the common conductive sheet);

[0034] S2: when it is necessary to debug or maintain the fire alarm controller, the key is manually inserted into the key holder, the rocker disc is driven to open the travel switch to a manual function opening state (the spring sheet contacts the conductive sheet 1 and the common conductive sheet, so that the conductive sheet 1 and the common conductive sheet are conductive), and after the manual indication lamp on the fire alarm controller is lighted (the limit pin reaches the limit table), the travel switch automatically resets to the intermediate state. At this time, relevant personnel can manually start the relevant peripheral components and loads connected to the fire alarm controller for inspection.

[0035] S3: when the debugging or maintenance of the fire alarm controller is completed, the key is manually inserted into the key holder, the rocker disc is driven to open the travel switch to an automatic function opening state (the spring sheet contacts the conductive sheet 2 and the common conductive sheet, so that the conductive sheet 2 and the common conductive sheet are conductive), and after the automatic indication lamp on the fire alarm controller is lighted (the limit pin reaches the limit table), the travel switch automatically resets to the intermediate state. At this time, the fire alarm controller is in an automatic state, and after an alarm signal is generated, the peripheral components and loads are automatically started in linkage.

[0036] S4: when it is necessary to debug or maintain again, steps S2-S3 are continuously executed.

[0037] The above embodiment is only one of the preferred embodiments of the utility model, and should not be used to limit the protection scope of the utility model, but any modification or polishing without substantial meaning made on the basis of the main design idea and spirit of the utility model, and the technical problems solved still consistent with the utility model, should be included in the protection scope of the utility model.

Claims

1. A self-resetting key switch, characterized by, The application relates to a reset travel switch (1) welded on the circuit board of a fire alarm controller, a rocker rotating disc (2) fixed with the reset travel switch (1), a surface cover (3) buckled on the surface of the fire alarm controller to encapsulate the reset travel switch (1) and the rocker rotating disc (2), and a key (4) penetrating through the surface cover (3) and cooperating with the rocker rotating disc (2).

2. A self-resetting key switch according to claim 1, wherein The reset travel switch (1) comprises a base (5) welded on the circuit board of the fire alarm controller, a sunken circular table (6) arranged on the base (5), a conductive sheet (8) horizontally arranged on the base and penetrating through the base for external connection, a positioning shaft (7) arranged in the center of the sunken circular table (6), and a spring (9) arranged in the sunken circular table (6) and a spring sheet (10) arranged at the bottom of the sunken circular table (6).

3. A self-resetting key switch according to claim 2, wherein The top center of the base (5) is concave to form a first opening (11), the side wall of the first opening is provided with two limiting tables (12), the center is provided with a fixing hole (13), and the bottom is provided with a plurality of through holes (14) at the connecting position of the side wall; wherein the limiting tables (12) are used for limiting the spring (9); the fixing hole (13) is used for the penetration of the positioning shaft (7), and the through holes (14) are used for the penetration of the conductive sheet through the base (5).

4. A self-resetting key switch according to claim 3, wherein The conductive sheet (8) comprises a first conductive sheet (81), a second conductive sheet (82) and a common conductive sheet (83); wherein the two ends of the first conductive sheet (81) and the second conductive sheet (82) are provided with pins (84), and one end of the common conductive sheet (83) is provided with a pin (84); the pin (84) penetrates through the through hole (14) at the bottom of the base and is welded externally.

5. A self-resetting key switch according to claim 4, wherein, The top end and the bottom end of the spring (9) are provided with limiting pins (15), and the two limiting pins (15) are respectively limited on the opposite side walls of the two limiting tables (12).

6. A self-resetting key switch according to claim 5, wherein, The sunken circular table (6) is provided with a penetrating hole (16) in the center and a rocker (17) for driving the sunken circular table (6) to rotate on the side surface, the back surface is in a cylindrical shape, the bottom surface is provided with a second opening, the column body is provided with a third opening (18), the spring sheet (10) is arranged on the edge of the second opening, and the limiting pin (15) penetrates out of the third opening (18).

7. A self-resetting key switch according to claim 6, wherein, The rocker rotating disc (2) comprises a rotating disc body (20) with a positioning hole (19) in the center of the bottom, a U-shaped claw (21) arranged on the side surface of the rotating disc body (20) and used for fixing the rocker (17), a key fixer (22) arranged on the top of the rotating disc body (20), and a key groove (23) formed on the key fixer (22).

8. A self-resetting key switch according to claim 7, wherein, The surface cover (3) is integrated on the panel of the fire alarm controller, the surface cover (3) is provided with an opening (24) through which the key fixer can pass, and the bottom surface is provided with a sliding groove through which the rocker rotating disc (2) can move leftward and rightward.

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