CN219017495U

CN219017495U - Small-depression stroke key switch

Info

Publication number: CN219017495U
Application number: CN202223341538.8U
Authority: CN
Inventors: 李晓东
Original assignee: DONGGUAN NINGRUI SWITCH CO LTD
Current assignee: DONGGUAN NINGRUI SWITCH CO LTD
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-05-12
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to the technical field of switches, in particular to a small-depression stroke key switch, which comprises a base, a shell covered on the base, a self-locking assembly arranged on the base, a fixed contact, a spring piece, a sliding column capable of sliding up and down relative to the shell, and a resetting piece for providing upward resetting force for the sliding column, wherein the spring piece comprises a fixed section connected with an output metal strip, a first elastic section connected with the fixed section and a second elastic section, the free end of the first elastic section is provided with a movable contact, one end of the second elastic section is fixedly connected with the first elastic section, the other end of the second elastic section is tilted towards the direction away from the fixed contact, and the joint of the second elastic section and the first elastic section is positioned at one end of the first elastic section away from the movable contact. The small-depression travel key switch is not easy to generate elastic fatigue, and the depression travel is small.

Description

Small-depression stroke key switch

Technical Field

The utility model relates to the technical field of switches, in particular to a small-depression stroke key switch.

Background

The conventional key switch, as shown in fig. 1, comprises a housing 11, a cover 16, a stationary contact 12, a plurality of elastic sheets 13, a self-locking assembly 14, a plurality of sliding columns 15, a plurality of springs 152 and a button 17, wherein orientation mechanisms are respectively arranged between the upper part of the sliding column 15 and the cover 16 and between the lower part of the sliding column and the housing 11 so that the sliding column cannot rotate, and the springs 152 are arranged between the bottom of the sliding column 15 and the housing 11. The sliding column 15 is driven to slide downwards by pressing the button 17, the pressing rod 151 is driven to press the elastic sheet 13, the elastic sheet 13 drives the movable contact to swing towards the direction of the fixed contact, and the movable contact is closed with the fixed contact, so that the power-on is completed. The spring piece 13 structure of the key switch adopts a one-section elastic deformation design, and elastic fatigue is easy to generate at the elastic deformation part after long-time use, so that the movable contact and the static contact cannot keep good closing precision, the closing is not tight enough, and the good electrified state of the switch cannot be kept.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide the small-depression stroke key switch, wherein the elastic sheet of the small-depression stroke key switch adopts the structural design of a fixed section, a first elastic section and a second elastic section, the second elastic section adopts the structural design that one end is fixed and the other end is tilted, the possibility of elastic fatigue of the first elastic section and the second elastic section is low, the possibility of elastic fatigue of the elastic sheet is low and normal work cannot be performed, the defects that the existing key switch adopts a one-section elastic deformation design, elastic fatigue is easy to occur at an elastic deformation part after long-time use, and therefore, a movable contact and a static contact cannot keep good closing precision, are not tight enough to close, and a good power-on state of the switch cannot be maintained can be overcome.

The aim of the utility model is achieved by the following technical scheme: the utility model provides a little push stroke key switch, includes the base, closes in the casing of base, sets up in the auto-lock subassembly of base, stationary contact, shell fragment, can relative casing upper and lower gliding traveller and be used for providing the reset piece of upward restoring force for the traveller, the shell fragment include with the fixed section that output metal strip is connected, first elastic segment and the second elastic segment of being connected with the fixed section, the free end of first elastic segment is provided with the movable contact, the one end and the first elastic segment fixed connection of second elastic segment, the other end is towards keeping away from the direction perk of stationary contact, the traveller is when sliding downwards extrusion second elastic segment and drive the free end of first elastic segment is towards being close to stationary contact direction swing, thereby drives the movable contact with the closed circular telegram of stationary contact, the junction of second elastic segment and first elastic segment is located the first elastic segment is kept away from the one end of movable contact.

The sliding contact type electric motor further comprises an input metal strip and an output metal strip which are arranged on the base, the number of the static contacts is multiple, the multiple static contacts are alternately arranged on the input metal strip, the number of the elastic sheets and the sliding columns is equal to that of the static contacts, each elastic sheet corresponds to the corresponding static contact, and each sliding column corresponds to the corresponding elastic sheet.

The input metal strip is connected with an input terminal, and the output metal strip is connected with an output terminal.

The output metal strip comprises two sub metal strips, a diode is connected between the two sub metal strips, at least one elastic sheet is fixed on one of the sub metal strips, and the rest elastic sheets are fixed on the other sub metal strip.

The reset piece is a pressure spring, a blind hole for placing the pressure spring is formed in the lower end of the sliding column, the base is provided with a fixed column, and the lower end of the pressure spring is sleeved outside the fixed column.

The sliding column extends to the side to be provided with the extrusion piece, drive the extrusion piece when sliding downwards and move down, the extrusion piece extrudes the second elastic section and drives the free end of first elastic section is towards being close to the swing of stationary contact direction, thereby drive the movable contact with the closed circular telegram of stationary contact.

The lower end face of the extrusion block is provided with an extrusion face for extruding the second elastic section, and the extrusion face is an arc face.

Wherein, the upper end of traveller is connected with presses the cap.

The self-locking assembly comprises a linkage bar, a spring and a locking needle, wherein the spring is clamped between the end part of the linkage bar and the base, the linkage bar is provided with a plurality of extrusion inclined planes, locking grooves are formed in at least two extrusion inclined planes, one end of the locking needle is fixed on the back surface of the sliding column, and the locking needle is located above the extrusion inclined planes.

The utility model has the beneficial effects that: the elastic piece of the small-depression stroke key switch adopts the structural design of the fixed section, the first elastic section and the second elastic section, the second elastic section adopts the structural design that one end is fixed and the other end is tilted, the possibility of elastic fatigue of the first elastic section and the second elastic section is low at the same time, the elastic fatigue of the elastic piece is low and the possibility of incapability of normal operation is low, and the defects that the elastic piece of the traditional key switch adopts a one-section elastic deformation design, elastic fatigue is easy to occur at an elastic deformation part after long-time use, so that a movable contact and a static contact cannot keep good closing precision, the closing is not tight enough and a good electrified state of the switch cannot be kept can be effectively overcome.

Meanwhile, the elastic sheet in the prior art adopts a one-section elastic deformation design, when the sliding column moves downwards to extrude the elastic sheet, the extrusion part of the sliding column gradually approaches to the free end of the elastic sheet along with the downward movement of the sliding column, namely the extrusion part is far away from the bending part of the elastic sheet, so that the sliding column is caused to move downwards by the same distance, and the distance of the free end of the elastic sheet, which approaches to the moving contact, is reduced instead, therefore, the elastic sheet in the prior art adopts a one-section elastic deformation design, the distance of the sliding column, which needs to move downwards, is larger, namely the pressing stroke is larger. According to the utility model, the elastic piece adopts the structural design of the fixed section, the first elastic section and the second elastic section, the sliding column moves downwards and then extrudes the second elastic section, the second elastic section drives the first elastic section to swing so as to drive the movable contact to move close to the stationary contact, one end of the second elastic section is fixedly connected with the first elastic section, the other end of the second elastic section is tilted, the sliding column moves downwards gradually, the extrusion part is gradually close to the free end of the second elastic section, but the second elastic section drives the force point of the first elastic section to be always positioned at the joint of the first elastic section and the second elastic section, so that the sliding column moves downwards for the same distance, and the moving distance of the free end of the elastic piece close to the stationary contact is not reduced. The sliding column of the key switch can be closed by smaller downward movement Cheng Shixian fixed contacts and movable contacts, and compared with the prior art, the key switch has smaller pressing stroke.

Drawings

Fig. 1 is an exploded view of the prior art.

Fig. 2 is a perspective view of the present utility model.

Fig. 3 is a perspective view of the present utility model with the housing removed.

Fig. 4 is a rear view of fig. 2 of the present utility model.

Fig. 5 is an exploded view of the strut and reset member of the present utility model.

Fig. 6 is a perspective view of the base of the present utility model.

Fig. 7 is a perspective view of the spring, the input metal strip and the output metal strip of the present utility model.

The reference numerals are: base 1, casing 2, stationary contact 3, shell fragment 4, slide 5, extrusion piece 6, extrusion face 7, reset 8, fixed section 9, first elastic section 10, second elastic section 11, movable contact 12, input metal strip 13, input terminal 14, output metal strip 15, output terminal 16, sub-metal strip 17, blind hole 18, fixed column 19, press cap 20, linkage strip 21, spring 22, lock pin 23, extrusion inclined plane 24, lock attachment groove 25, lock piece 26, diode 27.

Detailed Description

The present utility model is further described below with reference to examples and fig. 2-7, which are not intended to be limiting, for the purpose of facilitating understanding of those skilled in the art.

Referring to fig. 2-7, a small-depression stroke key switch includes a base 1, a housing 2 covered on the base 1, a self-locking assembly provided on the base 1, a stationary contact 3, a spring 4, a sliding column 5 capable of sliding up and down relative to the housing 2, and a reset member 8 for providing an upward reset force for the sliding column 5, wherein the spring 4 includes a fixed section 9 connected with the output metal strip 15, a first elastic section 10 connected with the fixed section 9, and a second elastic section 11, a free end of the first elastic section 10 is provided with a movable contact 12, one end of the second elastic section 11 is fixedly connected with the first elastic section 10, the other end of the second elastic section 11 is tilted in a direction away from the stationary contact 3, and when the sliding column 5 slides down, the second elastic section 11 is pressed to drive the free end of the first elastic section 10 to swing in a direction close to the stationary contact 3, thereby driving the movable contact 12 to be closed and energized, and a joint of the second elastic section 11 and the first elastic section 10 is located at a position away from the movable contact 12 of the first elastic section 10.

According to the small-depression stroke key switch disclosed by the utility model, the elastic piece 4 adopts the structural design of the fixed section 9, the first elastic section 10 and the second elastic section 11, the second elastic section 11 adopts the structural design that one end is fixed and the other end is tilted, the possibility of elastic fatigue of the first elastic section 10 and the second elastic section 11 is low at the same time, the possibility that the elastic piece 4 is subjected to elastic fatigue and cannot work normally is low, and the defect that the elastic fatigue is easy to occur at an elastic deformation part after long-time use due to the adoption of a one-section elastic deformation design of the elastic piece 4 of the traditional key switch can be effectively overcome, so that the movable contact 12 and the fixed contact 3 cannot keep good closing precision, are not close enough and cannot keep a good power-on state of the switch.

In the prior art, the elastic sheet 4 adopts a one-section elastic deformation design, when the sliding column 5 moves downwards to extrude the elastic sheet 4, the extrusion part of the sliding column 5 gradually approaches the free end of the elastic sheet 4 along with the downward movement of the sliding column 5, namely, the extrusion part is far away from the bending part of the elastic sheet 4, so that the sliding column 5 moves downwards by the same distance, the distance that the free end of the elastic sheet 4 moves close to the stationary contact 3 is reduced, and therefore, the elastic sheet 4 in the prior art adopts a one-section elastic deformation design, and the required downward movement distance of the sliding column 5 is larger, namely, the pressing stroke is larger. According to the utility model, the elastic sheet 4 adopts the structural design of the fixed section 9, the first elastic section 10 and the second elastic section 11, the sliding column 5 moves downwards and then presses the second elastic section 11, the second elastic section 11 drives the first elastic section 10 to swing so as to drive the movable contact 12 to move close to the fixed contact 3, the second elastic section 11 adopts the structural design that one end is fixedly connected with the first elastic section 10, the other end is tilted, the sliding column 5 moves downwards gradually, and although the pressing part is gradually close to the free end of the second elastic section 11, the second elastic section 11 drives the force applying point of the first elastic section 10 to be always positioned at the joint of the first elastic section 10 and the second elastic section 11, so that the sliding column 5 moves downwards for the same distance, and the moving distance of the free end of the elastic sheet 4 close to the fixed contact 3 is not reduced. The sliding column 5 of the present application can close the stationary contact 3 and the movable contact 12 with smaller downward movement Cheng Shixian, and the pressing stroke of the key switch of the present application is smaller than that of the prior art.

By adopting the structural design, the key switch has smaller pressing stroke and thinner total thickness.

The device further comprises an input metal strip 13 and an output metal strip 15, wherein the input metal strip 13 and the output metal strip 15 are arranged on the base 1, the number of the fixed contacts 3 is multiple, the fixed contacts 3 are alternately arranged on the input metal strip 13, the number of the elastic sheets 4 and the sliding columns 5 is equal to that of the fixed contacts 3, each elastic sheet 4 corresponds to the corresponding fixed contact 3, and each sliding column 5 corresponds to the corresponding elastic sheet 4.

Wherein, the input metal strip 13 is connected with an input terminal 14, and the output metal strip 15 is connected with an output terminal 16.

The output metal strip 15 includes two sub metal strips 17, a diode 27 is connected between the two sub metal strips 17, at least one elastic sheet 4 is fixed on one of the sub metal strips 17, and the remaining elastic sheets 4 are fixed on the other sub metal strip 17.

The resetting piece 8 is a pressure spring, a blind hole for placing the pressure spring is formed in the lower end of the sliding column 5, the base 1 is provided with a fixing column 19, and the lower end of the pressure spring is sleeved outside the fixing column 19.

The sliding column 5 extends to the side and is provided with an extrusion block 6, when the sliding column 5 slides downwards, the extrusion block 6 is driven to move downwards, the extrusion block 6 extrudes the second elastic section 11 to drive the free end of the first elastic section 10 to swing towards the direction close to the fixed contact 3, so that the movable contact 12 and the fixed contact 3 are driven to be closed and electrified.

Wherein, the lower terminal surface of extrusion piece 6 is provided with and is used for extrudeing extrusion face 7 of second elastic segment 11, extrusion face 7 is the arcwall face.

Wherein, the upper end of the slide column 5 is connected with a pressing cap 20.

The self-locking assembly comprises a linkage bar 21, a spring 22 and a locking needle 23, wherein the spring 22 is clamped between the end part of the linkage bar 21 and the base 1, the linkage bar 21 is provided with a plurality of extrusion inclined planes 24, at least two extrusion inclined planes 24 are internally provided with locking grooves 25, one end of the locking needle 23 is fixed on the back surface of the sliding column 5, and the locking needle 23 is positioned above the extrusion inclined planes 24.

Wherein, a locking piece 26 is disposed between two adjacent locking grooves 25, and the locking piece 26 is disposed between two locking grooves 25, for preventing two adjacent locking pins 23 from simultaneously entering the locking grooves 25, i.e. for preventing two adjacent spring plates 4 from closing with the corresponding stationary contacts 3.

In the practical use process of the application, the pressing cap 20 is pressed down, the sliding column 5 moves down, the corresponding elastic sheet 4 and the stationary contact 3 are pressed to be closed (called a closing position herein), meanwhile, the lock needle 23 of the closing position presses the pressing inclined surface 24 downwards, the linkage bar 21 is driven to transversely move and compress the spring 22, the lock needle 23 moves down to the notch of the locking groove 25 and does not press the pressing inclined surface 24 any more, the spring 22 drives the linkage bar 21 to move back a little distance, the lock needle 23 is clamped into the locking groove 25, and the sliding column 5 is locked to continuously press the elastic sheet 4 of the closing position, so that the closing power-on state is kept; when the sliding column 5 in the closed position moves downwards to the bottommost part, the linkage bar 21 reaches the maximum traversing distance, at the moment, the lock pins 23 in the other positions leave the corresponding locking grooves 25, the corresponding sliding column 5 is driven by the pressure spring to return to the initial position under the action of the pressure spring, and the spring plates 4 in the other positions keep the open circuit state.

The above embodiments are preferred embodiments of the present utility model, and besides, the present utility model may be implemented in other ways, and any obvious substitution is within the scope of the present utility model without departing from the concept of the present utility model.

Claims

1. The utility model provides a little stroke key switch that presses, includes the base, closes in the casing of base, sets up in the auto-lock subassembly of base, stationary contact, shell fragment, can slide the traveller about the relative casing to and be used for providing the piece that resets of upward restoring force for the traveller, still including setting up in the input metal strip and the output metal strip of base, its characterized in that: the shell fragment include with the fixed section that output metal strip is connected, with fixed section connected first elastic section and second elastic section, the free end of first elastic section is provided with the movable contact, the one end and the first elastic section fixed connection of second elastic section, the other end is towards keeping away from the direction perk of stationary contact, the traveller is when sliding downwards extrudeed the second elastic section and drive the free end of first elastic section is towards being close to stationary contact direction swing, thereby drives the movable contact with stationary contact closed circular telegram, the junction of second elastic section and first elastic section is located the first elastic section is kept away from the one end of movable contact.

2. The small depression stroke key switch as defined in claim 1, wherein: the number of the static contacts is multiple, the multiple static contacts are alternately arranged on the input metal strip, the number of the elastic sheets and the sliding columns is equal to that of the static contacts, each elastic sheet corresponds to the corresponding static contact, and each sliding column corresponds to the corresponding elastic sheet.

3. The small depression stroke key switch as defined in claim 2, wherein: the input metal strip is connected with an input terminal, and the output metal strip is connected with an output terminal.

4. The small depression stroke key switch as defined in claim 2, wherein: the output metal strip comprises two sub-metal strips, a diode is connected between the two sub-metal strips, at least one elastic sheet is fixed on one sub-metal strip, and the rest elastic sheets are fixed on the other sub-metal strip.

5. The small depression stroke key switch as defined in claim 1, wherein: the reset piece is a pressure spring, a blind hole for placing the pressure spring is formed in the lower end of the sliding column, the base is provided with a fixed column, and the lower end of the pressure spring is sleeved outside the fixed column.

6. The small depression stroke key switch as defined in claim 1, wherein: the sliding column is provided with an extrusion block in a laterally extending mode, the extrusion block is driven to move downwards when the sliding column slides downwards, the extrusion block extrudes the second elastic section to drive the free end of the first elastic section to swing towards the direction close to the fixed contact, and therefore the movable contact and the fixed contact are driven to be closed and electrified.

7. The small depression stroke key switch as claimed in claim 6, wherein: the lower end face of the extrusion block is provided with an extrusion face for extruding the second elastic section, and the extrusion face is an arc face.

8. The small depression stroke key switch as defined in claim 1, wherein: the upper end of the sliding column is connected with a pressing cap.

9. The small depression stroke key switch as defined in claim 1, wherein: the self-locking assembly comprises a linkage bar, a spring and a locking needle, wherein the spring is clamped between the end part of the linkage bar and the base, the linkage bar is provided with a plurality of extrusion inclined planes, locking grooves are formed in at least two extrusion inclined planes, one end of the locking needle is fixed on the back surface of the sliding column, and the locking needle is positioned above the extrusion inclined planes.