Microswitch

Abstract

The utility model discloses a microswitch, which belongs to the technical field of microswitches and comprises a shell and a front cover, a reset piece and a positioning block are fixedly connected to the top of a public contact piece, the top of one side of the reset piece is located at the bottom of a button, a movable contact seat is further sleeved on the reset piece, a movable contact is fixedly connected to one side of the movable contact seat, and a movable contact is fixedly connected to the other side of the movable contact seat. One end of the upper contact piece is fixedly connected with an upper contact, one end of the lower contact piece is also fixedly connected with a lower contact, the movable contact seat is also connected with a spring piece, and the other end of the spring piece abuts against the inner side of the positioning block. According to the utility model, the shaking of the microswitch is reduced, the influence caused by shaking is reduced, and the contact protection mechanism can block the movable contact from the upper and lower contacts when the microswitch is not installed and used, thereby reducing the wear caused in the contact process, and prolonging the service life of the microswitch.

Description

Technical Field

[0001] This utility model relates to the field of micro switch technology, specifically a micro switch. Background Technology

[0002] A micro switch is a type of switch with a small contact gap and a quick-acting mechanism. It operates by using a specified stroke and force to perform switching actions. It is covered by a housing and has a drive rod on the outside. Because the contact gap of the switch is relatively small, it is called a micro switch, also known as a sensitive switch.

[0003] The above technical conditions also have some drawbacks: most existing microswitches use springs for reset, and the springs need to deform axially and laterally at the same time. After a long period of use, they are prone to deformation, which reduces the effectiveness of the microswitches.

[0004] Based on this, the present invention designs a micro switch to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a micro switch to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a micro switch, comprising a housing and a front cover, wherein a button is movably disposed on one side of the top of the housing, an upper contact piece and a lower contact piece are fixedly connected to the other side of the housing, a common contact piece is fixedly connected to the bottom of the housing, a reset piece and a positioning block are fixedly connected to the top of the common contact piece, one side of the reset piece is located at the bottom of the button, a movable contact seat is sleeved on the reset piece, a movable contact is fixedly connected to one side of the movable contact seat, an upper contact is fixedly connected to one end of the upper contact piece, a lower contact is fixedly connected to one end of the lower contact piece, a spring piece is connected to the movable contact seat, and the other end of the spring piece abuts against the inner side of the positioning block.

[0007] By adopting the above technical solution, using a spring plate for transmission, and further enhancing the stability of the micro switch through the dual arrangement of a positioning block and a reset plate, the stability of the micro switch can be increased.

[0008] Preferably, a groove is provided on the housing between the upper and lower contact pieces, and a contact protection mechanism is engaged inside the groove. The contact protection mechanism includes a protrusion and two sets of blocking pieces, which can separate the moving contact from the upper and lower contacts.

[0009] By adopting the above technical solution, the micro switch can be protected before it is used, reducing the impact when the moving and stationary contacts come into contact.

[0010] Preferably, a pull ring is fixedly connected to one outer end of the protrusion.

[0011] By adopting the above technical solution, it is convenient to pull out the protruding part.

[0012] Preferably, the protruding part is further provided with a pull block.

[0013] By adopting the above technical solution, the protruding part can be easily broken off.

[0014] Preferably, two sets of abutting blocks are fixedly connected to both sides of the protrusion and to one side of the pull block, and the abutting blocks are in the shape of right-angled triangles.

[0015] By adopting the above technical solution, it can be pressed tightly against the inside of the groove, reducing the amount of dust entering the inside of the switch from the groove.

[0016] In summary, this application has the following beneficial technical effects: by setting the spring sheet, moving contact seat and positioning block, the stability of the micro switch during use can be increased and the impact of shaking can be reduced. Furthermore, by setting the contact protection mechanism, the moving contact and the upper and lower contacts of the micro switch can be isolated when it is not installed and used, reducing wear caused during contact and increasing its service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0019] Figure 2 This is a schematic diagram of the front structure of this embodiment;

[0020] Figure 3 This is an exploded view illustrating the overall structure of this embodiment;

[0021] Figure 4 This is a schematic diagram of the contact protection mechanism in this embodiment.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Housing; 2. Front cover; 3. Button; 4. Upper contact; 5. Lower contact; 6. Common contact; 7. Reset piece; 8. Positioning block; 9. Moving contact base; 10. Moving contact; 11. Upper contact; 12. Lower contact; 13. Spring sheet; 14. Contact protection mechanism; 141. Protrusion; 142. Barrier piece; 143. Pull block; 144. Clamping block; 145. Pull ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0026] Reference Figure 1 , Figure 2 and Figure 3 A micro switch includes a housing 1 and a front cover 2, which are typically fixed together by ultrasonic welding. A button 3 is movably mounted on one side of the top of the housing 1. The button 3 is snapped into the inside of the housing 1, and its top is freely pressable while its bottom is held in place by an elastic element, allowing it to reset after being pressed. An upper contact 4 and a lower contact 5 are fixedly connected to the other side of the housing 1. A common contact 6 is also fixedly connected to the bottom of the housing 1. A reset piece 7 and a positioning block 8 are fixedly connected to the top of the common contact 6. One side of the reset piece 7 is located at the bottom of the button 3. When the bottom of the button 3 moves downward continuously, one side of the reset piece 7 can be lowered. When pressed, a movable contact base 9 is also sleeved on the reset piece 7. A movable contact 10 is fixedly connected to one side of the movable contact base 9. An upper contact 11 is fixedly connected to one end of the upper contact piece 4, and a lower contact 12 is fixedly connected to one end of the lower contact piece 5. When the movable contact 10 moves upward, it can contact the upper contact 11. When the movable contact 10 moves downward, it can contact the lower contact 12, thus connecting different circuits. A spring piece 13 is also connected to the movable contact base 9. The other end of the spring piece 13 abuts against the inner side of the positioning block 8, providing assistance for the movement of the movable contact base 9 and increasing its performance. Its transmission method is more stable than that of a spring, which facilitates the control of the circuit by the micro switch.

[0027] Furthermore, refer to Figure 1 and Figure 4 A groove is provided on the housing 1 between the upper contact 4 and the lower contact 5. A contact protection mechanism 14 is engaged inside the groove. The contact protection mechanism 14 includes an extension 141 and two sets of blocking plates 142, which can separate the moving contact 10 from the upper contact 11 and the lower contact 12.

[0028] Furthermore, a pull ring 145 is fixedly connected to one end of the outer side of the protrusion 141, which allows the protrusion 141 to be easily pulled out.

[0029] Furthermore, a pull block 143 is provided on the protrusion 141. The pull block 143 is made of relatively brittle plastic, which can withstand a large tensile force in the axial direction and can be easily broken when subjected to lateral force. Then, after the protrusion is pulled out a certain distance, the protrusion 141 is broken off from the pull block 143.

[0030] Furthermore, two sets of abutting blocks 144 are fixedly connected to both sides of the protrusion 141 and to one side of the pull block 143. The abutting block 144 is in the shape of a right triangle, and its inclined surface contacts the groove opened on the housing 1, which can press the broken protrusion 141 against the inside of the housing 1.

[0031] The implementation principle of this embodiment is as follows: When in use, by pressing button 3, the bottom of button 3 contacts one side of moving contact base 9. Then, under the action of spring plate 13 and positioning block 8, moving contact 10 moves downward, changing from contact with upper contact 11 to contact with lower contact 12, thereby realizing the control of micro switch. When a new micro switch is not in use, its moving contact 10 and upper contact 11 will always be in contact. At this time, a blocking plate 142 is added between moving contact 10 and upper contact 11 to protect the two contacts. When the micro switch needs to be used, the protrusion 141 is pulled out from the inside of housing 1 by pull ring 145. When the position of pull block 143 is in the outer shell of housing 1, the protrusion 141 is pried open to break pull block 143. Then, the groove is blocked by the clamping block 144 to increase the stability of the switch.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro switch, comprising a housing (1) and a front cover (2), characterized in that: A button (3) is movably mounted on one side of the top of the housing (1). An upper contact piece (4) and a lower contact piece (5) are fixedly connected to the other side of the housing (1). A common contact piece (6) is also fixedly connected to the bottom of the housing (1). A reset piece (7) and a positioning block (8) are fixedly connected to the top of the common contact piece (6). Some of the top of the reset piece (7) is located at the bottom of the button (3). A movable contact seat (9) is also sleeved on the reset piece (7). A movable contact point (10) is fixedly connected to one side of the movable contact seat (9). An upper contact point is fixedly connected to one end of the upper contact piece (4). (11) A lower contact (12) is fixedly connected to one end of the lower contact piece (5), and a spring piece (13) is connected to the moving contact base (9). The other end of the spring piece (13) abuts against the inner side of the positioning block (8). A groove is also provided on the housing (1) between the upper contact piece (4) and the lower contact piece (5). A contact protection mechanism (14) is snapped into the inside of the groove. The contact protection mechanism (14) includes a protrusion (141) and two sets of blocking pieces (142), which can separate the moving contact (10) from the upper contact (11) and the lower contact (12).

2. A micro switch according to claim 1, characterized in that: A pull ring (145) is fixedly connected to one end of the outer side of the protrusion (141).

3. A micro switch according to claim 1, characterized in that: The protrusion (141) is also provided with a pull block (143).

4. A micro switch according to claim 3, characterized in that: Two sets of abutting blocks (144) are fixedly connected to both sides of the protrusion (141) and to one side of the pull block (143). The abutting blocks (144) are right-angled triangles.

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