Microswitch with adjustable acting force

Abstract

One end of a beryllium copper elastic piece is provided with a common end contact, the other end of the beryllium copper elastic piece is provided with a beryllium copper elastic piece large arm for applying the acting force to an ejector pin, the two sides of the beryllium copper elastic piece large arm are elastic piece end faces, and the tail end of the beryllium copper elastic piece large arm is fixedly arranged between two fulcrum supports. The end faces of the two elastic pieces abut against fulcrum clamping grooves in the end faces of one ends of the corresponding fulcrum supports, a normally-closed contact is arranged above the common end contact, and a normally-open contact is arranged below the common end contact. The invention has the advantages that: one end of the fulcrum bracket contacted with the end face of the elastic sheet is provided with the vertically arranged fulcrum clamping grooves, and the position of the fulcrum clamping grooves contacted with the end face of the elastic sheet is adjusted according to elastic force provided by actual needs.

Description

Technical Field

[0001] The invention belongs to the field of switches and relates to a micro switch with adjustable acting force. Background Art

[0002] Micro switch is a kind of switch widely used in control application field, with simple structure and reliable use. In order to make the common contact and normally open contact and normally closed contact switch reliably after the top pin applies force to the beryllium copper shrapnel arm, the end face of the shrapnel and the fixing point of the shrapnel arm should be in the same horizontal plane. After the top pin exerts force on the beryllium copper shrapnel arm, the beryllium copper shrapnel can provide 0.7-0.9N force to make the common contact contact with the normally closed contact.

[0003] When the existing products are used in places with external impact, the beryllium copper shrapnel cannot provide greater force to drive the common contact to the normally closed contact reliably. When the common contact contacts the normally open contact, the hardness of the beryllium copper shrapnel arm is not enough to withstand the force applied by the ejector. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a micro switch with adjustable force.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a micro switch with adjustable force, comprising a beryllium copper spring, a fulcrum bracket, a normally open contact, a normally closed contact and a common end contact, a common end contact is provided at one end of the beryllium copper spring, a beryllium copper spring arm for applying force by a pin is provided at the other end of the beryllium copper spring, both sides of the beryllium copper spring arm are spring end faces, the end of the beryllium copper spring arm is fixedly arranged between two fulcrum brackets, the two spring end faces are against the fulcrum card slots of one end face of the corresponding fulcrum bracket, a normally closed contact is provided above the common end contact, and a normally open contact is provided below the common end contact; The fulcrum bracket includes a transverse section and a vertical section. The transverse section is connected to the vertical section toward the end face of the spring sheet to form an L shape. The two fulcrum brackets are arranged in parallel. The end of the beryllium copper spring sheet is fixed to the end of the arm by a connecting plate and bolts between the two transverse sections. The vertical section is provided with a plurality of vertically arranged fulcrum slots toward the end face of the spring sheet. The end face of the spring sheet selects the corresponding fulcrum slot according to the elastic force actually required to be provided.

[0006] Furthermore, a reinforcing arm is provided above the end of the beryllium copper shrapnel arm to cover the point where the force of the beryllium copper shrapnel arm is applied by the ejector.

[0007] Furthermore, the reinforcing arm is sleeved on the end of the beryllium copper shrapnel arm.

[0008] Furthermore, one end of the reinforcing arm is fixed to the end of the large arm of the beryllium copper shrapnel.

[0009] The beneficial effects of the present invention are as follows: first, a vertically arranged fulcrum slot is provided at one end of the fulcrum bracket that contacts the end face of the spring sheet, and the position of the fulcrum slot that contacts the end face of the spring sheet can be adjusted according to the elastic force provided in actual needs.

[0010] Secondly, a reinforcing arm is arranged on the outside of the end of the beryllium copper shrapnel arm. The ejector applies force on the reinforcing arm, and the reinforcing arm applies force on the beryllium copper shrapnel arm, thereby changing the force point and force stroke of the beryllium copper shrapnel arm. There is a force large enough to separate the common end contact from the normally closed contact and to make the common end contact contact with the normally open contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the invention.

[0012] 1 is a beryllium copper shrapnel; 2 is a fulcrum bracket; 3 is a normally open contact; 4 is a normally closed contact; 5 is a ejector pin; 6 is a reinforcing arm; 11 is a beryllium copper shrapnel arm; 12 is a shrapnel end face; 13 is a common terminal contact; 14 is the end of the beryllium copper shrapnel arm; 21 is a fulcrum slot; 22 is a horizontal section; 23 is a vertical section; 31 is a normally open contact bracket; 41 is a normally closed contact bracket. DETAILED DESCRIPTION

[0013] The following will be combined with the attached embodiment of the present invention Figure 1 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] Example 1 Reference Figure 1 A micro switch with adjustable force comprises a beryllium copper shrapnel 1, a fulcrum bracket 2, a normally open contact 3, a normally closed contact 4 and a common end contact 13. The common end contact 13 is provided at one end of the beryllium copper shrapnel 1, and the other end of the beryllium copper shrapnel 1 is a beryllium copper shrapnel arm 11 on which a pin 5 applies force. Both sides of the beryllium copper shrapnel arm 11 are shrapnel end faces 12. The end of the beryllium copper shrapnel arm 11 is fixedly arranged between two fulcrum brackets 2, and the two shrapnel end faces 12 are against the fulcrum card slot 21 of one end face of the corresponding fulcrum bracket. A normally closed contact 4 is provided above the common end contact 13, and a normally open contact 3 is provided below the common end contact 13.

[0015] A micro switch with adjustable force, the fulcrum bracket includes a horizontal section 22 and a vertical section 23, the horizontal section is connected to the vertical section towards the end face of the spring piece to form an L shape, the two fulcrum brackets are arranged in parallel, the beryllium copper spring piece upper arm end 14 is fixed between the two horizontal sections by a connecting plate and bolts; the vertical section is provided with a plurality of vertically arranged fulcrum slots towards the end face of the spring piece. The spring piece end face selects the corresponding fulcrum slot according to the elastic force actually required to be provided.

[0016] A micro switch with adjustable acting force, wherein a normally closed contact 4 is arranged above a common end contact through a normally closed contact bracket 41.

[0017] A micro switch with adjustable acting force, wherein a normally open contact 3 is arranged below a common end contact through a normally open contact bracket 31.

[0018] A micro switch with adjustable action force, wherein a reinforcing arm 6 is provided above the end of a beryllium copper shrapnel arm and covers the action point of the beryllium copper shrapnel arm where an ejector pin applies action force.

[0019] The utility model relates to a micro switch with adjustable action force, wherein a reinforcing arm is sleeved on the end of a large arm of a beryllium copper shrapnel.

[0020] The utility model relates to a micro switch with adjustable action force. One end of a reinforcing arm is fixed to the end of a beryllium copper spring arm through a connecting plate and a bolt.

[0021] A micro switch with adjustable action force, one end of a reinforcing arm is fixed to the end of a beryllium copper shrapnel arm by a snap-fit ​​method.

[0022] A micro switch with adjustable action force, one end of a reinforcing arm is fixed to the end of a beryllium copper shrapnel arm through other existing structures.

[0023] A micro switch with adjustable force. Under the same environment, the farther the distance between the end face of the spring and the horizontal plane of the fixing point of the spring arm, the greater the force exerted by the common end contact on the normally closed contact. Therefore, we set the fulcrum bracket to be L-shaped, and set a plurality of vertically arranged fulcrum slots at the end of the fulcrum bracket that contacts the end face of the spring, and select the position of the fulcrum slot that matches the end face of the spring according to the elastic force actually required.

[0024] A micro switch with adjustable force, a reinforcing arm is arranged at the position where the force point of the beryllium copper shrapnel upper arm ejector is applied, the force point and force stroke of the beryllium copper shrapnel upper arm are changed, so that the beryllium copper shrapnel upper arm has a sufficient force to separate the common end contact from the normally closed contact and make the common end contact contact with the normally open contact. The problem of the beryllium copper shrapnel upper arm bending due to the stress of the beryllium copper shrapnel upper arm being insufficient to offset the force generated by the beryllium copper shrapnel will not be caused.

[0025] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A micro switch with adjustable force, comprising a beryllium copper spring, a fulcrum bracket, a normally open contact, a normally closed contact and a common terminal contact, Features: A common terminal contact is arranged at one end of the beryllium copper shrapnel, and a beryllium copper shrapnel arm to which the ejector pin applies force is arranged at the other end of the beryllium copper shrapnel. Both sides of the beryllium copper shrapnel arm are shrapnel end faces. The end of the beryllium copper shrapnel arm is fixedly arranged between two fulcrum brackets, and the two shrapnel end faces are against the fulcrum card slots of one end face of the corresponding fulcrum bracket. A normally closed contact is arranged above the common terminal contact, and a normally open contact is arranged below the common terminal contact. The fulcrum bracket includes a transverse section and a vertical section. The transverse section is connected to the vertical section toward the end face of the spring sheet to form an L shape. The two fulcrum brackets are arranged in parallel. The end of the beryllium copper spring sheet is fixed to the end of the arm by a connecting plate and bolts between the two transverse sections. The vertical section is provided with a plurality of vertically arranged fulcrum slots toward the end face of the spring sheet. The end face of the spring sheet selects the corresponding fulcrum slot according to the elastic force actually required to be provided.

2. A micro switch with adjustable force according to claim 1, Features: A reinforcing arm is arranged above the end of the beryllium copper shrapnel arm and covers the point where the beryllium copper shrapnel arm is applied with a force by the ejector pin.

3. A micro switch with adjustable force according to claim 2, Features: The reinforcing arm is sleeved on the end of the beryllium copper shrapnel arm.

4. A micro switch with adjustable force according to claim 2, Features: One end of the reinforcing arm is fixed to the end of the large arm of the beryllium copper shrapnel.

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