Switch

Abstract

The invention relates to the technical field of electrical equipment, in particular to a switch which comprises a shell, a button assembly, a swing mechanism and a terminal assembly. The button assembly and the swing mechanism are movably arranged in the shell; the terminal assembly comprises a wiring terminal arranged on the shell and a static contact electrically connected with the wiring terminal; the swing mechanism comprises a swing assembly and a vibration absorber, the swing assembly comprises a warping plate and a moving contact arranged on the warping plate, and the warping plate is movably arranged on the shell; the vibration absorber is connected with the warping plate and protrudes relative to the warping plate; wherein the button assembly can drive the seesaw to swing under the action of external force, so that the moving contact and the static contact are contacted or separated, and the switch is turned on or turned off; the vibration absorber is configured to be always located on the swing path of the warping plate and is used for absorbing vibration of the warping plate when the moving contact is in contact with the static contact. According to the switch, when the moving contact is in collision contact with the static contact, the problems of rocker vibration and repeated bounce are solved, and the problem of electric arc generation is further solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a switch. Background Art

[0002] The various types of switches provided by the related technology usually include a shell, a static contact, a button assembly, a seesaw and a moving contact, wherein the static contact is arranged on the shell, the moving contact is arranged on the seesaw, and the button assembly and the seesaw can be movably arranged on the shell. When the circuit needs to be turned on and off, it is only necessary to press the button assembly to use the button assembly to drive the seesaw to move until the moving contact is in contact with or separated from the static contact.

[0003] However, when the moving contact and the stationary contact of the wall product provided by the related art collide and contact, the seesaw will bounce repeatedly to generate an arc, which may easily burn the wall product or other electrical appliances electrically connected to the wall product. Summary of the invention

[0004] The purpose of the present invention includes providing a switch, which can improve the problem of seesaw vibration and repeated bouncing when the moving contact collides with the static contact, thereby improving the problem of arc generation, and protecting the switch and other electrical appliances electrically connected to the switch, that is, improving the problem of the switch or other electrical appliances electrically connected to the switch being burned.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The present invention provides a switch, comprising:

[0007] Housing, button assembly, swing mechanism and terminal assembly;

[0008] The button assembly and the swing mechanism are movably arranged on the housing;

[0009] The terminal assembly includes a wiring terminal arranged on the housing and a static contact electrically connected to the wiring terminal;

[0010] The swing mechanism includes a swing assembly and a vibration absorber. The swing assembly includes a seesaw and a moving contact arranged on the seesaw. The seesaw can be movably arranged on the housing. The vibration absorber is connected to the seesaw and protrudes relative to the seesaw.

[0011] The button assembly can drive the seesaw to swing under the action of external force, so that the moving contact and the stationary contact come into contact or separate, and the switch is turned on or off; the vibration absorber is configured to always be located on the swinging path of the seesaw, and is used to absorb the vibration of the seesaw when the moving contact and the stationary contact come into contact.

[0012] In an optional embodiment, the vibration absorber is configured to always be located on the path of the moving contact as the rocker swings.

[0013] In an optional embodiment, the vibration absorber includes an elastic member and a weight member, and the elastic member is connected between the weight member and the rocker plate; wherein,

[0014] The axial direction of the elastic member is configured to always be located on the swing path of the seesaw, so that the elastic member can be deformed along its axial direction, and the elastic member is fixedly connected or detachably connected to at least one of the seesaw and the counterweight.

[0015] In an optional embodiment, the counterweight member includes at least two counterweight blocks, the at least two counterweight blocks are detachably connected, and one of the counterweight blocks is connected to the elastic member; or,

[0016] At least two counterweights are selectively connected to the elastic member in a detachable manner.

[0017] In an optional embodiment, the weights of at least two counterweights are different; and / or,

[0018] At least one of the counterweights is centrosymmetrical in shape.

[0019] In an optional embodiment, the weight of at least one of the counterweights is 1 / 4 to 5 / 6 times the weight of the other counterweight.

[0020] In an optional embodiment, at least two counterweights are plug-fitted; or,

[0021] At least two counterweights are threadedly connected; or,

[0022] At least two counterweight blocks are snap-fitted to each other.

[0023] In an optional embodiment, at least one counterweight block is connected with a mounting shaft and a convex rib, at least another counterweight block is provided with a mounting hole, the mounting shaft and the convex rib are both detachably plugged into the mounting hole, wherein the convex rib is tightly fitted with the hole wall of the mounting hole, and a clearance is distributed between the peripheral wall of the mounting shaft and the hole wall of the mounting hole; or,

[0024] At least one counterweight block is connected to a mounting shaft, and at least another counterweight block is provided with a mounting hole and a convex rib, wherein the convex rib is located in the mounting hole, and the mounting shaft is plugged into the mounting hole, wherein the convex rib is tightly fitted with the peripheral wall of the mounting shaft, and a gap is distributed between the hole wall of the mounting hole and the peripheral wall of the mounting shaft.

[0025] In an optional embodiment, the convex rib is provided with a guiding inclined surface for guiding the mounting shaft to be inserted into the mounting hole.

[0026] The beneficial effects of the switch of the embodiment of the present invention include: the swing mechanism in the switch provided by the embodiment of the present invention includes a swing assembly and a vibration absorber, the swing assembly includes a seesaw and a moving contact arranged on the seesaw, the vibration absorber is connected to the seesaw and protrudes relative to the seesaw, and the vibration absorber is configured to always be located on the swing path of the seesaw; since the vibration absorber is always located on the swing path of the seesaw, when the moving contact is collided (the moving contact collides and contacts with the static contact), the vibration absorber can reliably absorb the vibration energy of the seesaw, so when the moving contact is hit, it can reliably improve the problem of vibration and repeated bouncing of the seesaw. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a schematic diagram of the structure of a switch in an embodiment of the present invention at a first viewing angle;

[0029] Figure 2 is a schematic diagram of the structure of a switch in an embodiment of the present invention at a second viewing angle;

[0030] Figure 3 for Figure 2 Sectional view in the AA direction;

[0031] Figure 4 It is a schematic diagram of the structure of the button assembly, the stationary contact and the swing mechanism in the embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the swing mechanism in an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of a decomposition mechanism of a swing mechanism in an embodiment of the present invention;

[0034] Figure 7 Schematic diagram of the structure of the counterweight block in the first viewing angle in an embodiment of the present invention;

[0035] Figure 8 Schematic diagram of the structure of the counterweight block in the second viewing angle in an embodiment of the present invention.

[0036] Icon: 010-switch; 100-housing; 110-terminal assembly; 111-wiring terminal; 112-static contact; 120-button assembly; 200-swing mechanism; 210-swing assembly; 211-rocker; 212-moving contact; 220-vibration absorber; 221-elastic member; 222-counterweight member; 223-counterweight block; 224-mounting shaft; 225-convex rib; 226-guide ramp; 227-mounting hole. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0042] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0043] The switch provided by the related technology usually includes a shell, a button assembly, a terminal assembly, a seesaw and a moving contact. The terminal assembly includes a wiring terminal arranged on the shell and a static contact electrically connected to the wiring terminal. The moving contact is arranged on the seesaw. The button assembly and the seesaw can be movably arranged on the shell. When the circuit needs to be turned on and off, it is only necessary to press the button assembly to use the button assembly to drive the seesaw to move so that the moving contact is in contact with or separated from the static contact. Among them, the button assembly includes a button, a transition piece, a spring and a pin. The button can be movably assembled on the shell through the transition piece. The transition piece cooperates with the seesaw transmission through the spring and the pin. When the button is dialed or pressed, the external force applied to the button is transmitted to the seesaw through the transition piece, the spring and the pin in sequence, so that the seesaw swings until the moving contact contacts or separates from the static contact. When the moving contact collides or contacts with the static contact, the impact force applied to the seesaw will cause the spring connected to the pin to vibrate, thereby causing the seesaw to vibrate with it. The vibration of the seesaw will cause the moving contact to separate from the static contact and then contact again, resulting in repeated bouncing. The repeated contact and separation of the moving contact and the static contact will cause electric field breakdown and arcing, and may easily burn the wall product or other electrical appliances electrically connected to the wall product.

[0044] In order to improve the above problems, this embodiment provides a wall product, the swing mechanism of which can improve the problem of seesaw vibration and repeated bouncing when the moving contact collides with the static contact, thereby improving the problem of arc generation, protecting the wall product and other electrical appliances electrically connected to the wall product, that is, improving the problem of burning the wall product or other electrical appliances electrically connected to the wall product. The following will describe this embodiment in detail with reference to the accompanying drawings.

[0045] Please refer to Figure 1 The switch 010 of this embodiment refers to a wall switch; of course, in other embodiments, the switch 010 may also refer to other switches that are not set on the wall, etc., which is not specifically limited here.

[0046] Please refer to Figure 1 , Figure 2 and Figure 3 The switch 010 includes a housing 100, a terminal assembly, a button assembly 120 and a swing mechanism 200. The terminal assembly 110 includes a terminal 111 arranged on the housing 100 and a static contact 112 electrically connected to the terminal 111; the swing mechanism 200 includes a swing assembly 210, and the swing assembly 210 includes a seesaw 211 and a moving contact 212 arranged on the seesaw 211; the seesaw 211 and the button assembly 120 can both be movably provided with the housing 100, and the button assembly 120 and the seesaw 211 are transmission-coordinated; when the button assembly 120 is pushed or pressed by an external force, the button assembly 120 can drive the seesaw 211 to swing, so as to utilize the seesaw 211 to drive the moving contact 212 to collide with or separate from the static contact 112, thereby realizing the connection or separation of the circuit.

[0047] Furthermore, the button assembly 120 is similar to the related art, and includes a button, a transition piece, a spring and a pin (not shown in the figure). The button is movably assembled on the housing 100 through the transition piece. The transition piece is transmitted and cooperated with the seesaw 211 through the spring and the pin. When the button is dialed or pressed, the external force applied to the button is transmitted to the seesaw 211 through the transition piece, the spring and the pin in turn, so that the seesaw 211 swings until the moving contact 212 contacts or separates from the static contact 112.

[0048] The inventors have discovered that in order to improve the problem of repeated bouncing of the seesaw 211, which occurs when the moving contact 212 collides with the stationary contact 112, causing the seesaw 211 to vibrate, thereby separating and re-contacting the moving contact 212 and the stationary contact 112. The related technology adopts a method of improving the structure of the seesaw 211 so that the moving contact 212 can be elastically assembled on the seesaw 211 through the improvement of its own structure. Although the vibration of the seesaw 211 can be reduced to a certain extent, it is still difficult to completely improve the bouncing problem of the seesaw 211. Therefore, to a certain extent, safety problems such as arcing may still occur.

[0049] To completely improve the problem of seesaw 211 bouncing, please refer to Figure 3 and Figure 4 The swing mechanism 200 of this embodiment also includes a vibration absorber 220, which is connected to the seesaw 211 and protrudes relative to the seesaw 211; wherein the vibration absorber 220 is configured to always be located on the swing path of the seesaw 211, and is used to absorb the vibration of the seesaw 211 when the moving contact 212 is impacted, for example: when the moving contact 212 collides with the static contact 112.

[0050] Since the vibration absorber 220 is always located on the swing path of the seesaw 211, when the moving contact 212 is hit, the vibration absorber 220 can reliably absorb the vibration energy of the seesaw 211. Therefore, when the moving contact 212 is hit, the problem of vibration and repeated bouncing of the seesaw 211 can be more thoroughly improved, and the problem of arc generation can be more thoroughly improved, thereby protecting the switch 010 and other electrical appliances electrically connected to the switch 010, that is, improving the problem of burning of the switch 010 or other electrical appliances electrically connected to the switch 010.

[0051] It should be understood that in other embodiments, the seesaw 211 may also be replaced by a swing plate, which is not specifically limited herein.

[0052] Please refer to Figure 5The vibration absorber 220 is configured to always be located on the path of the moving contact 212 swinging with the seesaw. Specifically, the contacting surface of the moving contact 212 and the stationary contact 112 and the vibration absorber 220 are located on both sides of the seesaw, and the vibration absorber 220 is always located on the path of the moving contact 212 swinging with the seesaw. In this way, when the moving contact 212 collides with the stationary contact 112, the vibration absorber 220 located on the moving path of the moving contact 212 can be used to reliably absorb the vibration of the seesaw, so as to completely improve the problem of seesaw vibration and bouncing, and then completely improve the problem of arcing, and improve safety.

[0053] Furthermore, the vibration absorber 220 includes an elastic member 221 and a counterweight member 222, wherein the elastic member 221 is connected between the counterweight member 222 and the seesaw 211; wherein the axial direction of the elastic member 221 is configured to always be located on the swinging path of the seesaw 211, so that the elastic member 221 can be deformed along its axial direction; illustratively, one end of the moving contact 212 is in contact with or separated from the static contact 112, and the other end extends from the other side of the seesaw, and the elastic member 221 is sleeved on the end of the moving contact 212 that does not contact the static contact 112. When the moving contact 212 moves to collide with the static contact 112, the impact force received by the moving contact 212 is transmitted to the seesaw 211, and then transmitted to the elastic member 221 and the matching member through the seesaw 211. The elastic member 221 and the matching member can be used to absorb the vibration energy received by the seesaw 211, and the axial direction of the elastic member 221 is always located on the moving path of the moving contact 212 set on the seesaw 211, which can ensure that the elastic member 221 can reliably deform in its axial direction and is not easily deformed in a direction or position deviating from its axial direction, so as to completely absorb the vibration of the seesaw 211, thereby completely improving the problem of the bouncing of the seesaw 211, and completely improving the problem of arcing, thereby improving safety.

[0054] The elastic member 221 can be selected as needed, for example, a tension spring, an elastic rubber column, etc., which is not specifically limited here.

[0055] Natural frequency of the vibration absorber 220 By adjusting the elastic coefficient k (i.e. stiffness) of the elastic member 221 of the vibration absorber 220 and the weight m of the counterweight 222, the frequency of the vibration absorber 220 can be adapted to the amplitude of the seesaw 211. In other words, by adjusting the elastic coefficient k (i.e. stiffness) of the elastic member 221 of the vibration absorber 220 and the weight m of the counterweight 222, the amplitude of the seesaw 211 can be made 0 or infinitely close to 0.

[0056] Please refer to Figure 5 and Figure 6In this embodiment, the elastic member 221 is fixedly connected to the counterweight member 222 and the seesaw 211. The counterweight member 222 includes at least two counterweight blocks 223. At least two counterweight blocks 223 are detachably connected, and one of the counterweight blocks 223 is fixedly connected to the elastic member 221. In this way, the weight of the counterweight member 222 can be adjusted by configuring different numbers of counterweight blocks 223, and the frequency of the vibration absorber 220 can be adapted to the amplitude of the seesaw 211 by adjusting the mass of the counterweight member 222, so that the amplitude of the seesaw 211 becomes 0 or infinitely close to 0.

[0057] Of course, in other embodiments, the elastic member 221 can also be detachably connected to the counterweight member 222. In this way, the frequency of the vibration absorber 220 can be adjusted by replacing the counterweight member 222 with different weights as a whole, or selectively selecting counterweight blocks 223 of different weights to be connected to the elastic member 221.

[0058] In other embodiments, the elastic member 221 may also be detachably connected to the seesaw 211, so that the frequency of the vibration absorber 220 may be adjusted by replacing the elastic member 221 connected with a counterweight block 223 of a different weight, or replacing the elastic member 221 with a different elastic coefficient.

[0059] It should be understood that in other embodiments, the elastic member 221 can be detachably connected to both the rocker 211 and the counterweight 222, so that the frequency of the vibration absorber 220 can be adjusted more flexibly by replacing the elastic member 221 with a different elastic coefficient or replacing the counterweight 223 with a different weight.

[0060] The manner in which the elastic member 221 is fixedly connected to at least one of the seesaw 211 and the counterweight 223 includes but is not limited to welding and integral molding; the manner in which the elastic member 221 is detachably connected to at least one of the seesaw 211 and the counterweight 223 includes but is not limited to threaded connection, clamping, and connection with fasteners such as bolts.

[0061] It should be noted that the elastic members 221 with different elastic coefficients may be springs made of different materials, which is not specifically limited here.

[0062] In order to be able to adjust the weight of the counterweight 222 more flexibly and accurately, the masses of different counterweights 223 can be configured to be different.

[0063] Optionally, the weight of at least one of the counterweights 223 is 1 / 4 to 5 / 6 times the weight of the other counterweight 223. Figure 6Exemplarily, the counterweight 222 includes three counterweight blocks 223, and the weights of the three counterweight blocks 223 are all different. The weight of one counterweight block 223 is m, the weight of another counterweight block 223 is 2 / 3m, and the weight of another counterweight block 223 is 1 / 2m.

[0064] The shape of the counterweight 223 can be selected as needed, for example, square, round, diamond, etc., and is not specifically limited here.

[0065] Optionally, at least one counterweight block 223 is centrally symmetrical in shape, so that the weight balance of the counterweight 222 can be ensured.

[0066] The detachable connection mode between the two counterweight blocks 223 can be selected as needed; in this embodiment, in order to ensure the easy disassembly and assembly between the counterweight blocks 223, the two counterweight blocks 223 are plug-fitted.

[0067] Of course, in other embodiments, the two counterweights 223 may also be connected by thread or snap-fit.

[0068] Please refer to Figure 5 , Figure 7 and Figure 8 Further, at least one counterweight 223 is connected with a mounting shaft 224 and a convex rib 225, and at least another counterweight 223 is provided with a mounting hole 227, and both the mounting shaft 224 and the convex rib 225 are detachably plugged and matched with the mounting hole 227, wherein the convex rib 225 is tightly fitted with the hole wall of the mounting hole 227, and the peripheral wall of the mounting shaft 224 and the hole wall of the mounting hole 227 are distributed with a gap. The tight fit between the convex rib 225 and the hole wall of the mounting hole 227 realizes an interference fit, thereby ensuring the connection stability between the two counterweights 223, and the distribution of the gap between the peripheral wall of the mounting shaft 224 and the hole wall of the mounting hole 227 ensures the easy disassembly between the two counterweights 223.

[0069] Furthermore, the convex rib 225 is connected to the peripheral wall of the installation shaft 224, and the convex rib 225 is provided with a guide slope 226 for guiding the installation shaft 224 to be inserted into the installation hole 227; such a configuration can, on the one hand, utilize the guide slope 226 to ensure the easy assembly between the two counterweights 223, and on the other hand, the convex rib 225 is connected to the peripheral wall of the installation shaft 224, which can improve the structural stability of the convex rib 225 itself, thereby ensuring that the convex rib 225 can reliably abut against the hole wall of the installation hole 227, thereby ensuring the assembly stability between the two counterweights 223. Of course, in other embodiments, the convex rib 225 can also be spaced apart from the peripheral wall of the installation shaft 224.

[0070] The number of ribs 225 can be selected as needed; in this embodiment, the number of ribs 225 is four, and the four ribs 225 are sequentially spaced around the axial direction of the mounting shaft 224. Of course, in other embodiments, the number of ribs 225 can also be one, two, three, six, etc., which is not specifically limited here.

[0071] It should be understood that in this embodiment, the counterweight block 223 fixedly connected to the elastic member 221 is only provided with a mounting hole 227; the other counterweight blocks 223 are respectively provided with mounting shafts 224 and mounting holes 227 on opposite sides, and the side provided with the mounting shaft 224 is also connected with a rib 225.

[0072] Of course, in other embodiments, the counterweight block 223 fixedly connected to the elastic member 221 is only connected to the mounting shaft 224 and the convex rib 225, which is not specifically limited here.

[0073] In other embodiments, the rib 225 can also be arranged in the mounting hole 227, and the mounting shaft 224 is plugged into the mounting hole 227, wherein the rib 225 fits tightly against the peripheral wall of the mounting shaft 224, and a gap is distributed between the hole wall of the mounting hole 227 and the peripheral wall of the mounting shaft 224.

[0074] When the switch 010 of this embodiment is on or off the circuit, the button assembly 120 can be toggled (pressed) to drive the seesaw 211 to swing, that is, the seesaw 211 can be used to drive the moving contact 212 to contact or separate from the stationary contact 112.

[0075] In summary, the switch 010 of the present invention includes a swing mechanism 200, and the swing mechanism 200 includes a seesaw 211 and a vibration absorber 220 connected to the seesaw 211. When the moving contact 212 collides and contacts with the static contact 112, the problem of vibration and repeated bouncing of the seesaw 211 can be improved, thereby improving the problem of arc generation, thereby protecting the switch 010 and other electrical appliances electrically connected to the switch 010, that is, improving the problem of burning of the switch 010 or other electrical appliances electrically connected to the switch 010.

[0076] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A switch, characterized in that: include: A housing (100), a button assembly (120), a swing mechanism (200) and a terminal assembly (110); The button assembly (120) and the swing mechanism (200) are movably arranged on the housing (100); The terminal assembly (110) comprises a connection terminal (111) arranged on the housing (100) and a stationary contact (112) electrically connected to the connection terminal (111); The swing mechanism (200) comprises a swing assembly (210) and a vibration absorber (220), wherein the swing assembly (210) comprises a seesaw (211) and a moving contact (212) arranged on the seesaw (211), wherein the seesaw (211) is movably arranged on the housing (100); the vibration absorber (220) is connected to the seesaw (211) and protrudes relative to the seesaw (211); wherein: The button assembly (120) can drive the seesaw (211) to swing under the action of an external force, so that the moving contact (212) and the stationary contact (112) come into contact or separate, and the switch is turned on or off; the vibration absorber (220) is configured to always be located on the swing path of the seesaw (211), and is used to absorb the vibration of the seesaw (211) when the moving contact (212) and the stationary contact (112) come into contact.

2. The switch according to claim 1, characterized in that: The vibration absorber (220) is configured to always be located on a path along which the moving contact (212) swings along with the seesaw.

3. The switch according to claim 1, characterized in that: The vibration absorber (220) comprises an elastic member (221) and a weight member (222), wherein the elastic member (221) is connected between the weight member (222) and the seesaw (211); wherein: The axial direction of the elastic member (221) is configured to always be located on the swing path of the seesaw (211), so that the elastic member (221) can be deformed along its axial direction, and the elastic member (221) is fixedly connected or detachably connected to at least one of the seesaw (211) and the counterweight (222).

4. The switch according to claim 3, characterized in that: The counterweight member (222) comprises at least two counterweight blocks (223), and the at least two counterweight blocks (223) are detachably connected, wherein one of the counterweight blocks (223) is connected to the elastic member (221); or, At least two of the counterweight blocks (223) are selectively connected to the elastic member (221) in a detachable manner.

5. The switch according to claim 4, characterized in that: The weights of at least two of the counterweights (223) are different; and / or, The shape of at least one of the counterweight blocks (223) is centrosymmetric.

6. The switch according to claim 5, characterized in that: The weight of at least one of the counterweight blocks (223) is 1 / 4 to 5 / 6 times the weight of the other counterweight block (223).

7. The switch according to claim 4, characterized in that: At least two of the counterweight blocks (223) are plug-fitted to each other; or, At least two of the counterweight blocks (223) are threadedly connected; or, At least two of the counterweight blocks (223) are snap-fitted to each other.

8. The switch according to claim 7, characterized in that At least one of the counterweight blocks (223) is connected with a mounting shaft (224) and a convex rib (225), and at least another of the counterweight blocks (223) is provided with a mounting hole (227), and the mounting shaft (224) and the convex rib (225) are both detachably plugged into the mounting hole (227), wherein the convex rib (225) is tightly fitted with the hole wall of the mounting hole (227), and a gap is distributed between the peripheral wall of the mounting shaft (224) and the hole wall of the mounting hole (227).

9. The switch according to claim 7, characterized in that: At least one of the counterweight blocks (223) is connected to a mounting shaft (224), and at least another of the counterweight blocks (223) is provided with a mounting hole (227) and a convex rib (225), wherein the convex rib (225) is located in the mounting hole (227), and the mounting shaft (224) is plugged into and matched with the mounting hole (227), wherein the convex rib (225) is tightly fitted with a peripheral wall of the mounting shaft (224), and a gap is distributed between the hole wall of the mounting hole (227) and the peripheral wall of the mounting shaft (224).

10. The switch according to claim 8 or 9, characterized in that: The convex rib (225) is provided with a guiding inclined surface (226) for guiding the installation shaft (224) to be inserted into the installation hole (227).

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