Switch

Abstract

A switch includes: a housing; a static contact; the moving contact can move to be separated from or contacted with the static contact, so that the switch is in an opening state or a closing state; the indicating piece can move between a first position and a second position; the moving contact is connected to the indicating piece through the transmission system, so that the movement of the moving contact is directly transmitted to the indicating piece; when the moving contact is in contact with the static contact, the indicating piece is located at the first position, and when the moving contact is separated from the static contact, the indicating piece is located at the second position.

Description

Technical Field

[0001] The utility model relates to a switch, and more particularly to a switch capable of indicating whether the switch is in a closed state or an open state. Background Art

[0002] The switch indication module is a safety function module of the switch, which is used to indicate the state of the contacts (for example, the closed state and the open state) to the user. Correct state indication is important for the operation of the switch. For example, when the switch is in the open state, the switch has an isolation function, and the user can padlock and repair related equipment. If the indication is inaccurate at this time, that is, the switch is actually in the closed state, but the indication module points to the open state, it will bring great safety hazards.

[0003] In the prior art, the switch indication module is generally located on the handle to indicate the state of the switch by the position of the handle. However, for switches whose contact movement is not completely controlled by the handle (e.g., circuit breaker type fusion switch), when the handle is in the closed position, the contact may be in the open position, resulting in the indication module indicating the handle position not being able to accurately indicate the state of the switch.

[0004] Therefore, it is desired to provide a switch to improve the deficiencies in the above-mentioned prior art. Utility Model Content

[0005] According to the first aspect of the utility model, a switch is proposed, comprising: a housing; a static contact; a moving contact capable of moving to separate from or contact with the static contact so that the switch is in an open state or a closed state; an indicator capable of moving between a first position and a second position; a transmission system, the moving contact being connected to the indicator via the transmission system so as to directly transmit the movement of the moving contact to the indicator; wherein, when the moving contact is in contact with the static contact, the indicator is in the first position, and when the moving contact is disengaged from the static contact, the indicator is in the second position.

[0006] According to the scheme, the movement of the indicator is directly associated with the movement of the moving contact, and the movement of the moving contact can directly lead to the corresponding movement of the indicator, so that the indicator can directly indicate the position of the moving contact, rather than the indicator indirectly indicating the position of the moving contact through the position of the handle as in the prior art. In this way, for switches whose contact movement is not completely manipulated by the handle (for example, circuit breaker type fusion switches), although the moving contact may be in the open position when the handle is in the closed position, the indicator can still correctly indicate that the moving contact is in the closed position (rather than the open position displayed by the handle), preventing users from mistakenly thinking that the switch that is actually in the closed state is in the open state, thereby preventing users from operating related equipment in a dangerous (live) state, thereby improving the safety of related equipment.

[0007] In some aspects, the switch may further include a mounting shaft extending in the first direction, and the indicator is rotatably mounted to the housing via the mounting shaft to rotate around the mounting shaft between a first position and a second position.

[0008] In some embodiments, the transmission system may include a connecting rod, which extends in a second direction and can only move linearly in the second direction, the second direction being perpendicular to the first direction, the first end of the connecting rod being connected to an indicator member to drive the indicator member to rotate between a first position and a second position, and the movement of the moving contact can actuate the second end of the connecting rod to drive the connecting rod to move.

[0009] In some embodiments, the connecting rod may have a groove at its first end, the groove having a channel extending along a third direction, the groove having a first wall and a second wall opposite to each other in a second direction, the third direction being perpendicular to both the first direction and the second direction, the indicator may include a driving arm extending parallel to the first direction, one end of the driving arm extending into the groove and being able to move relative to the groove along the channel, and the first wall or the second wall being able to contact and push the driving arm.

[0010] In some aspects, the transmission system may include a crank that is rotatable about an axis extending along the first direction, and the rotational movement of the crank can drive the movement of the moving contact and actuate the second end of the connecting rod to drive the movement of the connecting rod.

[0011] In some embodiments, the transmission system may further include a drive rod capable of rotating around an axis extending along a first direction, a first end of the drive rod being connected to a second end of the connecting rod, and a second end of the drive rod being connected to a crank, so that rotational movement of the crank can drive rotational movement of the drive rod.

[0012] According to this scheme, the rotational movement of the crank drives the rotational movement of the driving rod, and then the rotational movement of the driving rod drives the linear movement of the connecting rod, and finally the linear movement of the connecting rod drives the rotational movement of the indicating member, thereby realizing the motion transmission from the crank that drives the moving contact to the indicating member that indicates the movement of the moving contact, so that the indicating member can indicate the position of the moving contact in real time, and then indicate the state of the switch.

[0013] In some solutions, the driving rod may have a protrusion at its second end, and the crank may have a recess, and the protrusion is disposed in the recess, so that the rotational movement of the crank can drive the rotational movement of the driving rod.

[0014] In some embodiments, the connecting rod may have cam contact surfaces at its second end that are spaced apart from each other in the second direction and protrude toward each other, and the driving rod may have a driving portion at its first end that extends into the cam contact surfaces, so that the rotational movement of the driving rod can drive the linear movement of the connecting rod.

[0015] In some aspects, the housing may include a limiting portion, the limiting portion defining a track disposed around the connecting rod and extending along the second direction, so as to limit movement of the connecting rod in the third direction.

[0016] In some embodiments, the switch may further include a micro switch, which is disposed near the driving rod and configured to be triggered or released by the driving rod.

[0017] According to this solution, the state of the moving contact can be reflected not only mechanically in the position of the indicator, but also electronically in the state of the micro switch, further improving the reliability of indicating the switch state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a switch according to an embodiment of the utility model is shown, wherein the switch is in a closed state;

[0019] Figure 2 A schematic diagram of a switch according to an embodiment of the utility model is shown, wherein the switch is in an open state;

[0020] Figure 3 A schematic diagram showing the transmission between the connecting rod and the indicator member according to an embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram showing the transmission between the driving rod and the connecting rod according to an embodiment of the utility model is shown;

[0022] Figure 5 A schematic diagram of a limiting portion according to an embodiment of the utility model is shown.

[0023] Figure numerals: 100 switch, 110 housing, 112 limit portion, 120 static contact, 130 moving contact, 140 crank, 142 recess, 150 drive rod, 152 drive shaft, 154 drive portion, 156 protrusion, 160 connecting rod, 162 groove, 164 first wall, 166 second wall, 168 cam contact surface, 170 indicator, 172 mounting shaft, 174 drive arm. DETAILED DESCRIPTION

[0024] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0025] For clearer description, unless otherwise specified, the directional terms appearing in this article have the following meanings: the first direction refers to the direction of the axis around which the crank, drive rod and indicator member rotate; the second direction refers to the direction in which the connecting rod moves linearly; and the third direction refers to the direction perpendicular to both the first direction and the second direction.

[0026] Figure 1 and Figure 2 Schematic diagrams of a switch 100 in a closed state and an open state according to an embodiment of the utility model are respectively shown. The switch 100 mainly includes a housing 110, a static contact 120 and a moving contact 130. The switch 100 is controlled to be in a closed state or an open state accordingly by controlling the contact or separation between the moving contact 130 and the static contact 120.

[0027] In order to indicate the state (closed state or open state) of the switch 100, the switch 100 further includes an indicator 170 that can move between a first position and a second position. The indicator 170 is connected to the moving contact 130 via a transmission system, so that the moving state of the moving contact 130 (for example, moving from the closed position to the open position, or from the open position to the closed position) can be directly transmitted to the indicator 170 through the transmission system. When the moving contact 130 is in contact with the static contact 120, that is, the switch 100 is in the closed state, the indicator 170 is in the first position; and when the moving contact 130 is separated from the static contact 120, that is, the switch 100 is in the open state, the indicator 170 is in the second position. In this way, for the switch 100 whose movement of the moving contact 130 is not completely controlled by the handle (for example, a circuit breaker type fusion switch), although the moving contact 130 may be in the open position when the handle is in the closed position, the indicator 170 can still correctly indicate that the moving contact 130 is in the closed position (rather than the open position displayed by the handle), preventing the user from mistakenly believing that the switch 100 that is actually in the closed state is in the open state, thereby preventing the user from operating the related equipment in a dangerous (energized) state, thereby improving the safety of the related equipment.

[0028] Optionally, when the indicator 170 is in the first position, "ON", "closed" or any other suitable identification is displayed to the user to indicate that the switch 100 is in the closed state, and when the indicator 170 is in the second position, "OFF", "disconnected" or any other suitable identification is displayed to the user to indicate that the switch 100 is in the open state.

[0029] Preferably, the switch 100 may further include a mounting shaft 172, the mounting shaft 172 extending in a first direction (eg, perpendicular to Figure 1The indicator 170 is rotatably mounted to the housing 110 via a mounting shaft 172 so as to rotate between a first position and a second position around the mounting shaft 172. It should be understood that the above description is merely exemplary, and the present invention is not intended to limit the specific movement form of the indicator 170 between the first position and the second position. The indicator 170 may also be moved between the first position and the second position in a translational manner or in any other suitable manner.

[0030] Preferably, the transmission system may include a connecting rod 160, the connecting rod 160 being arranged in the second direction (eg, Figure 1 The first end of the connecting rod 160 (eg, Figure 1 The upper end of the connecting rod 160 is connected to the indicator 170 to drive the indicator 170 to rotate between the first position and the second position. The movement of the moving contact 130 can actuate the second end of the connecting rod 160 (for example, Figure 1 In addition, the connecting rod 160 may also have a groove 162 at its first end, and the groove 162 has a third direction (for example, Figure 1 The groove 162 has a first wall 164 and a second wall 166 that are opposite to each other in the second direction. The indicator 170 may include a driving arm 174 that extends parallel to the first direction. One end of the driving arm 174 extends into the groove 162 and can move along the channel relative to the groove 162. The first wall 164 or the second wall 166 can contact and push the driving arm 174 to allow the indicator 170 to rotate and move between the first position and the second position under the action of the driving arm 174.

[0031] Preferably, the transmission system may further include a crank 140, which is rotatable around an axis extending in the first direction, and the rotational movement of the crank 140 may drive the movement of the moving contact 130 and actuate the second end of the connecting rod 160 to drive the movement of the connecting rod 160. In addition, the transmission system may further include a driving rod 150, which is rotatable around an axis extending in the first direction, and the first end of the driving rod 150 is coupled to the second end of the connecting rod 160, and the second end of the driving rod 150 is coupled to the crank 140, so that the rotational movement of the crank 140 can drive the rotational movement of the driving rod 150. Optionally, the driving rod 150 may have a protrusion 156 at its second end, and the crank 140 may have a recess 142, and the protrusion 156 is disposed in the recess 142, so that the rotational movement of the crank 140 can drive the rotational movement of the driving rod 150 around the driving shaft 152.

[0032] Preferably, the connecting rod 160 may have cam contact surfaces 168 at its second end which are spaced apart from each other and protrude toward each other in the second direction, and the driving rod 150 may have a driving portion 154 at its first end which extends into the cam contact surface 168, so that the rotational movement of the driving rod 150 around the driving shaft 152 can drive the linear movement of the connecting rod 160 in the second direction. Figure 5 As shown, the housing 110 may include a limit portion 112, which defines a track arranged around the connecting rod 160 and extending along the second direction to limit the movement of the connecting rod 160 in the third direction, so that the movement of the connecting rod 160 is more stable, thereby making the transmission of the transmission system more reliable, and further making the function of indicating the state of the switch 100 more reliable.

[0033] According to the combination of the above-mentioned preferred embodiments, the transmission system includes a crank 140, a drive rod 150 and a connecting rod 160. The movement of the crank 140 that drives the moving contact 130 is transmitted to the movement of the indicator 170 via the drive rod 150 and the connecting rod 160, so that the position change of the indicator 170 can directly indicate the position change of the moving contact 130. The specific transmission process is described as follows.

[0034] like Figure 1 As shown, when the moving contact 130 is disengaged from the stationary contact 120 (i.e., the switch 100 changes from the closed state to the open state), the crank 140 rotates clockwise, and the interaction between the recess 142 of the crank 140 and the protrusion 156 of the drive rod 150 realizes the transmission from the clockwise rotation of the crank 140 to the counterclockwise rotation of the drive rod 150. The counterclockwise rotation of the drive rod 150 around the drive shaft 152 causes the drive portion 154 of the drive rod 150 that extends into the cam contact surface 168 to move upward, and through the interaction between the cam contact surface 168 of the connecting rod 160 and the drive portion 154 of the drive rod 150, the upward movement of the drive portion 154 of the drive rod 150 is transmitted to the upward movement of the connecting rod 160, realizing the transmission from the counterclockwise rotation of the drive rod 150 to the upward translation of the connecting rod 160 (as shown in FIG. 1 ). Figure 4 The connecting rod 160 translates upward so that the second wall 166 of the connecting rod 160 pushes the driving arm 174 of the indicator 170 extending into the groove 162 to move upward, so that the indicator 170 rotates counterclockwise under the action of the driving arm 174, thus realizing the transmission from the upward translation of the connecting rod 160 to the counterclockwise rotation of the indicator 170 (as shown in FIG. Figure 3 In summary, when the switch 100 is opened, the clockwise rotation of the crank 140 is transmitted to the counterclockwise rotation of the driving rod 150, which is then transmitted to the upward translation of the connecting rod 160, and finally to the counterclockwise rotation of the indicator 170.

[0035] Similarly, if Figure 2As shown, when the moving contact 130 moves in the direction of contact with the stationary contact 120 (i.e., the switch 100 changes from the open state to the closed state), the crank 140 rotates counterclockwise, and the interaction between the recess 142 of the crank 140 and the protrusion 156 of the drive rod 150 realizes the transmission from the counterclockwise rotation of the crank 140 to the clockwise rotation of the drive rod 150. The clockwise rotation of the drive rod 150 around the drive shaft 152 causes the drive portion 154 of the drive rod 150 that extends into the cam contact surface 168 to move downward, and through the interaction between the cam contact surface 168 of the connecting rod 160 and the drive portion 154 of the drive rod 150, the downward movement of the drive portion 154 of the drive rod 150 is transmitted to the downward movement of the connecting rod 160, realizing the transmission from the clockwise rotation of the drive rod 150 to the downward translation of the connecting rod 160 (as shown in FIG. 1 ). Figure 4 The connecting rod 160 translates downward so that the first wall 164 of the connecting rod 160 pushes the driving arm 174 of the indicator 170 extending into the groove 162 to move downward, so that the indicator 170 rotates clockwise under the action of the driving arm 174, thus realizing the transmission from the translation downward of the connecting rod 160 to the clockwise rotation of the indicator 170 (as shown in FIG. Figure 3 In summary, when the switch 100 is closed, the counterclockwise rotation of the crank 140 is transmitted to the clockwise rotation of the driving rod 150, which is then transmitted to the downward translation of the connecting rod 160, and finally to the clockwise rotation of the indicator 170.

[0036] It should be understood that in the detailed description of the above transmission process, the rotation direction (clockwise or counter-clockwise) and the translation direction (upward or downward) are merely exemplary, and the present invention is not intended to limit the specific movement direction of the components in the transmission system during the closing or opening of the switch 100.

[0037] Preferably, the switch 100 may further include a micro switch, which is disposed near the driving rod 150 and configured to be triggered or released by the driving rod 150. In this way, the state of the moving contact 130 can be reflected not only in the position of the indicator 170 mechanically, but also in the state of the micro switch electronically, further improving the reliability of indicating the state of the switch 100.

[0038] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A switch, characterized in that: include: case; Stationary contact; A moving contact capable of moving to separate from or contact with the stationary contact so as to place the switch in an open state or a closed state; an indicator member movable between a first position and a second position; a transmission system, wherein the movable contact is coupled to the indicator member via the transmission system so as to directly transmit the movement of the movable contact to the indicator member; Wherein, when the moving contact is in contact with the stationary contact, the indicator is at the first position, and when the moving contact is disengaged from the stationary contact, the indicator is at the second position.

2. The switch according to claim 1, characterized in that: Also included is a mounting shaft extending in a first direction, and the indicator is rotatably mounted to the housing through the mounting shaft to rotate around the mounting shaft between the first position and the second position.

3. The switch according to claim 2, characterized in that: The transmission system includes a connecting rod, which extends in a second direction and can only move linearly in the second direction, the second direction being perpendicular to the first direction, the first end of the connecting rod being connected to the indicating member to drive the indicating member to rotate between the first position and the second position, and the movement of the moving contact can actuate the second end of the connecting rod to drive the connecting rod to move.

4. The switch according to claim 3, characterized in that: The connecting rod has a groove at the first end, the groove has a channel extending along a third direction, the groove has a first wall and a second wall opposite to each other in the second direction, the third direction is perpendicular to both the first direction and the second direction, The indicator comprises a driving arm extending parallel to the first direction, one end of the driving arm extending into the groove and being movable along the channel relative to the groove, and the first wall or the second wall being able to contact and push the driving arm.

5. The switch according to claim 4, characterized in that: The transmission system includes a crank, which is rotatable around an axis extending along the first direction. The rotational movement of the crank can drive the movement of the moving contact and actuate the second end of the connecting rod to drive the movement of the connecting rod.

6. The switch according to claim 5, characterized in that The transmission system also includes a drive rod, which can rotate around an axis extending along the first direction. The first end of the drive rod is connected to the second end of the connecting rod, and the second end of the drive rod is connected to the crank, so that the rotational movement of the crank can drive the rotational movement of the drive rod.

7. The switch according to claim 6, characterized in that The driving rod has a protrusion at its second end, and the crank has a recess, in which the protrusion is arranged, so that the rotational movement of the crank can drive the rotational movement of the driving rod.

8. The switch according to claim 6, characterized in that The connecting rod has cam contact surfaces at its second end, which are spaced apart from each other in the second direction and protrude toward each other, and the driving rod has a driving portion at its first end that extends into the cam contact surfaces, so that the rotational movement of the driving rod can drive the linear movement of the connecting rod.

9. The switch according to claim 8, characterized in that The housing includes a limiting portion defining a track disposed around the connecting rod and extending along the second direction to limit movement of the connecting rod in the third direction.

10. The switch according to claim 6, characterized in that A micro switch is also included, which is arranged near the driving rod and is configured to be triggered or released by the driving rod.

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