Indicating assembly and three-position switch
Through the linear moving indicator design and the spring and limit hole structure, the problem of the three-station switch indicator has been solved, and the problem of large movement range and easy removal of the handle is achieved, miniaturizing the equipment and accurate indication of the operating status.
Patent Information
- Application Number
- CN202422659318.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-01
AI Technical Summary
The indicator of the existing three-station switch has a large range of movement, which is not conducive to miniaturization of the device, and the handle may be pulled out before the state switching is not completed during operation.
The linearly moving indicator design is adopted, and the first and second indicators are actuated by the first and second transmissions to move in the linear direction, combining the spring and limiting hole structure to ensure the accuracy of the indicator and the reliable operation of the handle.
The miniaturization of the device and accurate indication of the operating state are realized, preventing the handle from being pulled out when the state switching is not completed, and the operation reliability and accuracy are improved.
Smart Images
Figure CN223273142U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an indicating component and a three-position switch, and more particularly to an indicating component capable of reliably indicating the operating state of the three-position switch and a corresponding three-position switch. Background Art
[0002] The blade of the three-position switch can rotate between the isolation closed position, the open position, and the earthing closed position, allowing the three-position switch to switch between the isolation closed state, the open state, and the earthing closed state accordingly. To indicate the state of the three-position switch, an indicator is provided in a transmission connection with the blade, so that the rotation of the blade is converted into movement of the indicator. The user can obtain the position information of the blade by observing the movement of the indicator, and thus the operating state of the three-position switch.
[0003] But in the prior art, the moving range of the indicator is large, which is unfavorable for the miniaturization of the device. Meanwhile, during the handle operation of the three-position switch to switch its operating state, the handle may be withdrawn before the operating state switching is completed.
[0004] Therefore, it is desired to provide an indicator assembly and a three-position switch to improve the defects of the above-mentioned prior art. Utility Model Content
[0005] According to a first aspect of the present invention, an indicator assembly is proposed for indicating the state of a three-position switch, characterized in that it includes: a first output shaft, configured to move from a first position to a second position when the three-position switch moves from an isolation closed state to an isolation open state; a second output shaft, configured to move from a third position to a fourth position when the three-position switch moves from a grounding closed state to a grounding open state; a first transmission member, fixed to the first output shaft, and rotating together with the first output shaft; a second transmission member, fixed to the second output shaft, and rotating together with the second output shaft; wherein the indicator assembly further includes: a first indicator member, configured to be actuated by the first transmission member to move linearly along a first direction, so that when the first transmission member When an output shaft moves from a first position to a second position, the first indicator moves from the first indicator position to the second indicator position; the second indicator is configured to be actuated by the second transmission member to move linearly along the first direction, so that when the second output shaft moves from a third position to a fourth position, the second indicator moves from the third indicator position to the fourth indicator position; the first indicator located at the first indicator position indicates that the three-position switch is in an isolated and closed state; the first indicator located at the second indicator position indicates that the three-position switch is in an isolated and open state; the second indicator located at the fourth indicator position indicates that the three-position switch is in a grounded and open state; the second indicator located at the third indicator position indicates that the three-position switch is in a grounded and closed state.
[0006] According to this solution, the first indicator and the second indicator move linearly. Compared with the case where the indicator moves rotationally, the linearly moving indicator requires less space, which is conducive to miniaturization of the device.
[0007] In some embodiments, the first indicator and the second indicator may have a roughly flat plate shape, the first indicator and the second indicator are arranged parallel to each other and spaced apart along a second direction, the second direction being perpendicular to the first direction; the first indicator has a first clamping hole extending along the first direction, the second indicator has a second clamping hole extending along the first direction, and the indicator assembly further includes a retaining spring, which extends through the first clamping hole and the second clamping hole along the second direction to prevent the first indicator and the second indicator from moving along the second direction.
[0008] According to this solution, by providing a clip between the first indicator and the second indicator, the movements of the first indicator and the second indicator do not interfere with each other, thereby improving the accuracy of indicating the operating status of the three-position switch.
[0009] In some embodiments, the first indicator member has a first operating hole extending along the first direction, the first operating hole has two first accommodating portions and a first middle portion between the two first accommodating portions along the first direction, and the size of the first middle portion along the third direction is smaller than the size of the two first accommodating portions along the third direction, so that the handle can be inserted into the first operating hole in the first accommodating portion along the second direction to operate the three-position switch to switch between the isolation closing state and the isolation opening state, while being blocked in the first middle portion and cannot move along the second direction; the second indicator member has a second operating hole extending along the first direction, the second operating hole has two second accommodating portions and a second middle portion between the two second accommodating portions along the first direction, and the size of the second middle portion along the third direction is smaller than the size of the two second accommodating portions along the third direction, so that the handle can be inserted into the second operating hole in the second accommodating portion along the second direction to operate the three-position switch to switch between the grounding closing state and the grounding opening state, while being blocked in the second middle portion and cannot move along the second direction; wherein the third direction is perpendicular to both the first direction and the second direction.
[0010] According to this solution, when the handle is used to operate the three-position switch, if the three-position switch has not yet completed state transition (for example, the blade is somewhere between the closed and open positions), the handle is blocked by the relatively narrow middle portion and cannot be withdrawn. Only after the three-position switch has completed state transition can the handle be withdrawn through the relatively wide receiving portion. This arrangement makes handle operation of the three-position switch more reliable.
[0011] In some embodiments, the first transmission member may have a first groove, the first indicator member may have a first protrusion protruding from its surface toward the first transmission member, and the first protrusion is inserted into the first groove, so that the rotational movement of the first transmission member can actuate the first indicator member to move linearly, and the second transmission member may have a second groove, the second indicator member may have a second protrusion protruding from its surface toward the second transmission member, and the second protrusion is inserted into the second groove, so that the rotational movement of the second transmission member can actuate the second indicator member to move linearly.
[0012] In some embodiments, the first indicator member may have a first limiting hole extending along the first direction, and the support rod extends through the first limiting hole along the second direction, so that the first indicator member can only move along the first direction. The second indicator member may have a second limiting hole extending along the first direction, and the support rod extends through the second limiting hole along the second direction, so that the second indicator member can only move along the first direction.
[0013] According to this solution, the limiting hole makes the linear movement process of the indicator more stable, and the status indication of the three-position switch more accurate.
[0014] In some embodiments, the first limiting hole of the first indicator member may be aligned with the second limiting hole of the second indicator member along the second direction, and the support rod extends through the first limiting hole and the second limiting hole along the second direction.
[0015] In some embodiments, when the three-position switch is in any one of the isolated closed state, the open state and the earthed closed state, one of the first accommodating portions of the first operating hole of the first indicator member can be aligned with one of the second accommodating portions of the second operating hole of the second indicator member, and the handle can pass through the corresponding first operating hole and second operating hole along the second direction.
[0016] In some embodiments, the first indicator member may have two first operating holes, the second indicator member may have two second operating holes, and the first indicator member and the second indicator member have a Z-shaped bend, so that the two first operating holes are staggered along the second direction, and the two second operating holes are staggered along the second direction.
[0017] According to this solution, the Z-shaped bent indicator can achieve the adaptation of the same handle to the isolation operation and the grounding operation.
[0018] According to a second aspect of the present invention, a three-position switch is provided, comprising the indicating assembly according to the first aspect of the present invention.
[0019] In some embodiments, the three-position switch may further include a shell, on which a first window and a second window are provided, the first indicator is provided with a first mark and a second mark, and the second indicator is provided with a third mark and a fourth mark; when the first indicator is located at the first indication position, the first mark is aligned with the first window, and when the first indicator is located at the second indication position, the second mark is aligned with the first window; when the second indicator is located at the third indication position, the third mark is aligned with the second window, and when the second indicator is located at the fourth indication position, the fourth mark is aligned with the second window. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic diagram showing an indicator assembly according to an embodiment of the present utility model is shown;
[0021] Figure 2 A schematic diagram showing another perspective of an indicator assembly according to an embodiment of the present invention is shown.
[0022] Reference Signs List
[0023] 100 indicator components
[0024] 110 First output shaft
[0025] 120 Second output shaft
[0026] 130 First transmission member
[0027] 132 First Groove
[0028] 140 Second transmission member
[0029] 142 Second Groove
[0030] 150 First indicator
[0031] 151 First Card Hole
[0032] 152 First control hole
[0033] 153 first accommodation part
[0034] 154 First Middle Section
[0035] 155 First protrusion
[0036] 156 First limit hole
[0037] 157 First Mark
[0038] 158 Second Mark
[0039] 160 Second indicator
[0040] 161 Second card hole
[0041] 162 Second control hole
[0042] 163 Second accommodating portion
[0043] 164 Second middle section
[0044] 165 Second protrusion
[0045] 166 Second limit hole
[0046] 167 Third Mark
[0047] 168 The Fourth Mark
[0048] 170 circlip DETAILED DESCRIPTION
[0049] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the following will be combined with the drawings of specific embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.
[0050] For a clearer description, unless otherwise specified, the meanings of the directional nouns appearing in this article are as follows: the first direction is the direction in which the first indicator member and the second indicator member move linearly, the second direction is the direction in which the first indicator member and the second indicator member face each other, and the third direction is a direction perpendicular to both the first direction and the second direction.
[0051] Figure 1 A schematic diagram of an indication component 100 according to an embodiment of the present utility model is shown, and the indication component 100 is used to indicate the state of a three-position switch. The blade of the three-position switch can move between the isolation closing position, the isolation opening position, the grounding opening position and the grounding closing position, so that the three-position switch is in the isolation closing state, the isolation opening state, the grounding opening state and the grounding closing state, respectively. When the blade moves between the isolation closing position and the isolation opening position, the three-position switch controls whether the circuit is turned on or not; when the blade moves between the grounding closing position and the grounding opening position, the three-position switch controls whether the circuit is grounded or not. Among them, the isolation opening position of the blade is the same as the grounding opening position, and the isolation opening state of the three-position switch is the same as the grounding opening state. In this article, for the sake of simplicity, the isolation opening state and the grounding opening state are collectively referred to as the opening state in some descriptions, and the isolation opening position and the grounding opening position are collectively referred to as the opening position.
[0052] The indicator assembly 100 includes a first output shaft 110 and a second output shaft 120. The first output shaft 110 is configured to move from a first position to a second position when the three-position switch moves from an isolation-closed state to an isolation-opened state. In other words, the first output shaft 110 moves in response to the blade of the three-position switch moving between the isolation-closed position and the isolation-opened position. The second output shaft 120 is configured to move from a third position to a fourth position when the three-position switch moves from an earthing-closed state to an earthing-opened state. In other words, the second output shaft 120 moves in response to the blade of the three-position switch moving between the earthing-closed position and the earthing-opened position.
[0053] The indicator assembly 100 further includes a first transmission member 130 and a second transmission member 140. The first transmission member 130 is fixed to the first output shaft 110 and rotates together with the first output shaft 110, and the second transmission member 140 is fixed to the second output shaft 120 and rotates together with the second output shaft 120. The indicator assembly 100 further includes a first indicator member 150 and a second indicator member 160. The first indicator member 150 can be actuated by the first transmission member 130 to move in a first direction (e.g., Figure 1 The first indicator 150 is configured to move linearly in the first direction (approximately in the left-right direction shown), so that when the first output shaft 110 moves from the first position to the second position, the first indicator 150 moves from the first indicating position to the second indicating position. In other words, the first indicator 150 moves linearly in the first direction in response to the blade of the three-position switch moving between the isolation closed position and the isolation open position. The second indicator 160 can be actuated by the second transmission member 140 to move linearly in the first direction, so that when the second output shaft 120 moves from the third position to the fourth position, the second indicator 160 moves from the third indicating position to the fourth indicating position. In other words, the second indicator 160 moves linearly in the first direction in response to the blade of the three-position switch moving between the grounding closed position and the grounding open position. The first indicator 150 and the second indicator 160 move linearly. Compared to the case where the indicator moves rotationally, the linearly moving indicator requires less space, which is conducive to the miniaturization of the device.
[0054] The relationship between the position of the indicator and the operating state of the three-position switch is described in detail below:
[0055] (1) The blade of the three-position switch moves from the isolation closing position to the opening position and then to the grounding closing position.
[0056] When the blade is in the isolation closing position, the first output shaft 110 is in the first position, the first indicator 150 is in the first indicating position, and the second output shaft 120 is in the fourth position, the second indicator 160 is in the fourth indicating position.
[0057] During the period when the blade moves from the isolation closing position to the isolation opening position, the first output shaft 110 moves from the first position to the second position, the first indicator 150 moves from the first indication position to the second indication position, the second output shaft 120 remains at the fourth position, and the second indicator 160 remains at the fourth indication position.
[0058] When the blade is in the open position, the first output shaft 110 is in the second position, the first indicator 150 is in the second indicating position, and the second output shaft 120 is in the fourth position, the second indicator 160 is in the fourth indicating position.
[0059] During the period when the blade moves from the earthing opening position to the earthing closing position, the first output shaft 110 remains stationary at the second position, the first indicator 150 remains stationary at the second indicating position, the second output shaft 120 moves from the fourth position to the third position, and the second indicator 160 moves from the fourth indicating position to the third indicating position.
[0060] When the blade is in the earthing closing position, the first output shaft 110 is in the second position, the first indicator 150 is in the second indicating position, and the second output shaft 120 is in the third position, the fourth indicator 160 is in the third indicating position.
[0061] (2) The blade of the three-position switch moves from the grounding closed position to the isolation open position and then to the isolation closed position.
[0062] When the blade is in the earthing closing position, the first output shaft 110 is in the second position, the first indicator 150 is in the second indicating position, and the second output shaft 120 is in the third position, the fourth indicator 160 is in the third indicating position.
[0063] During the period when the blade moves from the earthing closing position to the earthing opening position, the first output shaft 110 remains stationary at the second position, the first indicator 150 remains stationary at the second indicating position, the second output shaft 120 moves from the third position to the fourth position, and the second indicator 160 moves from the third indicating position to the fourth indicating position.
[0064] When the blade is in the open position, the first output shaft 110 is in the second position, the first indicator 150 is in the second indicating position, and the second output shaft 120 is in the fourth position, the second indicator 160 is in the fourth indicating position.
[0065] During the period when the blade moves from the isolation open position to the isolation closed position, the first output shaft 110 moves from the second position to the first position, the first indicator 150 moves from the second indication position to the first indication position, the second output shaft 120 remains at the fourth position, and the second indicator 160 remains at the fourth indication position.
[0066] When the blade is in the isolation closing position, the first output shaft 110 is in the first position, the first indicator 150 is in the first indicating position, and the second output shaft 120 is in the fourth position, the second indicator 160 is in the fourth indicating position.
[0067] Preferably, the first indicator 150 and the second indicator 160 may have a substantially flat plate shape, and the first indicator 150 and the second indicator 160 are arranged parallel to each other and along the second direction (eg, Figure 1 The first indicator member 150 has a first retaining hole 151 extending in the first direction, and the second indicator member 160 has a second retaining hole 161 extending in the first direction. The indicator assembly 100 also includes a retaining spring 170 extending in the second direction through the first retaining hole 151 and the second retaining hole 161. The retaining spring 170 limits the relative movement of the first indicator member 150 and the second indicator member 160 in the second direction, preventing them from interfering with each other's movement, thereby improving the accuracy of the indication of the operating status of the three-position switch.
[0068] Preferably, the first indicator member 150 has a first operating hole 152 extending along the first direction, into which a handle can be inserted to operate the three-position switch, thereby moving the three-position switch between the isolation closed position and the isolation open position. The second indicator member 160 has a second operating hole 162 extending along the first direction, into which a handle can be inserted to operate the three-position switch, thereby moving the three-position switch between the earthing closed position and the earthing open position.
[0069] In order to prevent the handle from being mistakenly withdrawn before the operation is completed, the first operating hole 152 has two first accommodating portions 153 along the first direction and a first intermediate portion 154 between the two first accommodating portions 153. The first intermediate portion 154 is arranged along the third direction (for example, Figure 1 The size of the first receiving portion 153 along the third direction is smaller than the size of the two first receiving portions 153 along the third direction. For example, if the user wants to switch the three-position switch from the isolation closing position to the isolation opening position, the user first passes through one receiving portion 153 (for example, Figure 1 The handle is inserted into the first operating hole 152 and then the switching operation is performed. As the switching operation proceeds, the first operating hole 152 moves leftward along with the first indicator 150, so that the handle moves rightward relative to the first operating hole 152 via the first intermediate portion 154 to another receiving portion 153 (for example, Figure 1(The one on the right side is shown). When the switching operation is not completed, the handle moves relative to first operating hole 152 to first intermediate portion 154. Because first intermediate portion 154 is relatively narrow, the handle cannot be withdrawn from first operating hole 152. Only after the switching operation is completed, the handle moves relative to first operating hole 152 to the other first receiving portion 153. Because first receiving portion 153 is relatively wide, the handle can be withdrawn from first operating hole 152.
[0070] Similarly, the second operating hole 162 has two second accommodating portions 163 along the first direction and a second intermediate portion 164 between the two second accommodating portions 163. The size of the second intermediate portion 164 along the third direction is smaller than the size of the two second accommodating portions 163 along the third direction, so that the handle can be inserted into the second operating hole 162 along the second direction in the second accommodating portion 163 to operate the three-position switch, but is blocked in the second intermediate portion 164 and cannot be pulled out of the second operating hole 162.
[0071] Preferably, if Figure 2 As shown, the first transmission member 130 may have a first groove 132, and the first indicator member 150 may have a first protrusion 155 protruding from its surface toward the first transmission member 130. The first protrusion 155 is inserted into the first groove 132, so that the rotational movement of the first transmission member 130 can actuate the linear movement of the first indicator member 150. Similarly, the second transmission member 140 may have a second groove 142, and the second indicator member 160 may have a second protrusion 165 protruding from its surface toward the second transmission member 140. The second protrusion 165 is inserted into the second groove 142, so that the rotational movement of the second transmission member 140 can actuate the linear movement of the second indicator member 160.
[0072] Preferably, the first indicator member 150 may have a first limiting hole 156 extending in the first direction, with a support rod extending through the first limiting hole 156 in the second direction, so that the first indicator member 150 can only move in the first direction. Similarly, the second indicator member 160 may have a second limiting hole 166 extending in the first direction, with a support rod extending through the second limiting hole 166 in the second direction, so that the second indicator member 160 can only move in the first direction. More preferably, the first indicator member 150 and the second indicator member 160 may each have two or more first limiting holes 156 and second limiting holes 166, so that the support rods provide more stable support for the first indicator member 150 and the second indicator member 160. In particular, the support rods at the two first limiting holes 156 and the retaining spring 170 at the first retaining hole 151 form a triangular support, which makes the linear movement of the first indicator member 150 more stable and provides more accurate status indication for the three-position switch. Similarly, the support rods at the two second limiting holes 166 and the clamping spring 170 at the second clamping hole 161 form a triangular support, making the linear movement process of the second indicator 160 more stable and the status indication of the three-position switch more accurate.
[0073] Preferably, the first limiting hole 156 of the first indicator 150 can be aligned with the second limiting hole 166 of the second indicator 160 along the second direction, and the support rod extends through the first limiting hole 156 and the second limiting hole 166 along the second direction.
[0074] In addition, when the three-position switch is in any one of the isolated closed state, the open state and the earthed closed state, one of the first accommodating portions 153 of the first operating hole 152 of the first indicator 150 can be aligned with one of the second accommodating portions 163 of the second operating hole 162 of the second indicator 160, and the handle can pass through the corresponding first accommodating portion 153 of the first operating hole 152 and the second accommodating portion 163 of the second operating hole 162 along the second direction.
[0075] Preferably, the first indicator member 150 may have two first operating holes 152, and the second indicator member 160 may have two second operating holes 162. The first indicator member 150 and the second indicator member 160 are bent in a zigzag shape, so that the two first operating holes 152 are staggered along the second direction, and the two second operating holes 162 are staggered along the second direction. In this way, the zigzag first indicator member 150 and the second indicator member 160 can achieve the adaptation of the same handle for both isolation and grounding operations.
[0076] The three-position switch may further include a housing, on which a first window and a second window are provided, through which a user can observe the indication information of the first indicator 150 and the second indicator 160 respectively. The first indicator 150 is provided with a first mark 157 and a second mark 158. The first mark 157 may be, for example, Figure 1 As shown in the vertical bar, the second mark 158 can be, for example Figure 1 Similarly, the first indicator 160 is provided with a third mark 167 and a fourth mark 168, and the third mark 167 can be, for example, Figure 1 As shown in the vertical bar, the fourth mark 168 can be, for example, Figure 1 The horizontal bar shown.
[0077] The relationship between the operating status of the three-position switch and the marks observed by the user is described in detail as follows:
[0078] (1) When the three-position switch is in the isolated closed state, the first indicator 150 is located at the first indicating position, and the first mark 157 is aligned with the first window, so that the user can observe the first mark 157.
[0079] (2) When the three-position switch is in the isolated and opened state, the first indicator 150 is located at the second indicating position, and the second mark 158 is aligned with the first window, so that the user can observe the second mark 158.
[0080] (3) When the three-position switch is in the grounding and opening state, the second indicator 160 is located at the fourth indicating position, and the fourth mark 168 is aligned with the first window, so that the user can observe the fourth mark 168.
[0081] (4) When the three-position switch is in the grounded closed state, the second indicator 160 is located at the third indicating position, and the third mark 167 is aligned with the second window, so that the user can observe the third mark 167.
[0082] In summary, when the user observes the first mark 157, it indicates that the three-position switch is in the isolated closed state. When the user observes the second mark 158, it indicates that the three-position switch is in the isolated open state. When the user observes the third mark 167, it indicates that the three-position switch is in the grounded closed state. When the user observes the fourth mark 168, it indicates that the three-position switch is in the grounded open state.
[0083] 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 the various technical features and structures proposed in the present invention may also be combined without exceeding the scope of protection of the present invention, which is determined by the appended claims.
Claims
1. An indicator assembly for indicating the state of a three-position switch, characterized in that: include: a first output shaft configured to move from a first position to a second position when the three-position switch moves from an isolated closed state to an isolated open state; a second output shaft configured to move from a third position to a fourth position when the three-position switch moves from a grounded closed state to a grounded open state; a first transmission member fixed to the first output shaft and rotating together with the first output shaft; a second transmission member fixed to the second output shaft and rotating together with the second output shaft; Wherein, the indication component further includes: a first indicator member configured to be actuated by the first transmission member to move linearly along a first direction, such that when the first output shaft moves from the first position to the second position, the first indicator member moves from the first indicating position to the second indicating position; a second indicator member configured to be actuated by the second transmission member to move linearly along the first direction, such that when the second output shaft moves from the third position to the fourth position, the second indicator member moves from the third indicating position to the fourth indicating position; Wherein, the first indicator located at the first indicating position indicates that the three-position switch is in the isolated closed state; The first indicator located at the second indicating position indicates that the three-position switch is in the isolation and opening state; The second indicator located at the fourth indicating position indicates that the three-position switch is in the grounding trip state; The second indicator located at the third indication position indicates that the three-position switch is in the grounded closed state.
2. The indicator assembly according to claim 1, characterized in that The first indicator and the second indicator have a substantially flat plate shape, the first indicator and the second indicator are arranged parallel to each other and spaced apart along a second direction, the second direction being perpendicular to the first direction; The first indicator has a first clamping hole extending along the first direction, the second indicator has a second clamping hole extending along the first direction, and the indicator assembly further includes a clamping spring, which extends through the first clamping hole and the second clamping hole along the second direction to prevent the first indicator and the second indicator from moving along the second direction.
3. The indicator assembly according to claim 2, characterized in that The first indicator member has a first operating hole extending along the first direction, the first operating hole having two first accommodating portions and a first intermediate portion between the two first accommodating portions along the first direction, the first intermediate portion having a dimension along the third direction smaller than a dimension of the two first accommodating portions along the third direction, so that a handle can be inserted into the first operating hole along the second direction in the first accommodating portion to operate the three-position switch to switch between the isolating closed state and the isolating open state, and the handle is blocked at the first intermediate portion and cannot move along the second direction; The second indicator member has a second operating hole extending along the first direction, the second operating hole having two second accommodating portions and a second intermediate portion between the two second accommodating portions along the first direction, the second intermediate portion having a size along the third direction smaller than a size of the two second accommodating portions along the third direction, so that the handle can be inserted into the second operating hole along the second direction in the second accommodating portion to operate the three-position switch to switch between the earthing closed state and the earthing open state, and the handle is blocked at the second intermediate portion and cannot move along the second direction; The third direction is perpendicular to both the first direction and the second direction.
4. The indicator assembly according to claim 2, characterized in that The first transmission member has a first groove, and the first indicator member has a first protrusion protruding from a surface thereof toward the first transmission member, and the first protrusion is inserted into the first groove, so that the rotational movement of the first transmission member can actuate the linear movement of the first indicator member. The second transmission member has a second groove, the second indicator has a second protrusion protruding from its surface toward the second transmission member, and the second protrusion is inserted into the second groove, so that the rotational movement of the second transmission member can actuate the second indicator to move linearly.
5. The indicator assembly according to claim 2, characterized in that The first indicator has a first limiting hole extending along the first direction, and the support rod extends through the first limiting hole along the second direction, so that the first indicator can only move along the first direction. The second indicator has a second limiting hole extending along the first direction, and the support rod extends through the second limiting hole along the second direction, so that the second indicator can only move along the first direction.
6. The indicator assembly according to claim 5, characterized in that The first limiting hole of the first indicator is aligned with the second limiting hole of the second indicator along the second direction, and the support rod extends through the first limiting hole and the second limiting hole along the second direction.
7. The indicator assembly according to claim 6, characterized in that When the three-position switch is in any one of the isolation closed state, the isolation open state, the earthing open state and the earthing closed state, one of the first accommodating parts of the first operating hole of the first indicator is aligned with one of the second accommodating parts of the second operating hole of the second indicator, and the handle can pass through the corresponding first operating hole and second operating hole along the second direction.
8. The indicator assembly according to claim 2, characterized in that The first indicator member has two first operating holes, the second indicator member has two second operating holes, and the first indicator member and the second indicator member have a Z-shaped bending shape, so that the two first operating holes are staggered along the second direction, and the two second operating holes are staggered along the second direction.
9. A three-position switch, characterized in that: Comprising an indication assembly according to any one of claims 1 to 8.
10. The three-position switch according to claim 9, characterized in that: The invention also includes a housing, wherein the housing is provided with a first window and a second window, the first indicator is provided with a first mark and a second mark, and the second indicator is provided with a third mark and a fourth mark; When the first indicator is located at the first indication position, the first mark is aligned with the first window, and when the first indicator is located at the second indication position, the second mark is aligned with the first window; When the second indicator is located at the third indication position, the third mark is aligned with the second window, and when the second indicator is located at the fourth indication position, the fourth mark is aligned with the second window.