Microswitch touch safety protection device

Abstract

The invention relates to a microswitch touch safety protection device which comprises a microswitch, a barrel shell, a positioning bolt, a limiting pin, a limiting spring, a normally-moving feeler lever and a normally-disconnected feeler lever, the microswitch is provided with a pressure control diaphragm, a base and a positioning seat are arranged in the barrel shell, the base is further fixedly connected with one end of a guide barrel, the other end of the guide barrel is sleeved with the pressure control diaphragm, and the pressure control diaphragm is fixedly connected with the positioning seat. A limiting hole is formed in the surface of the positioning seat, the positioning bolt is connected to one end of the limiting hole in a screwed mode, the limiting pin is arranged at the other end of the limiting hole in a sleeved mode, the limiting spring is clamped between the limiting pin and the positioning bolt, and limiting grooves are formed in the surfaces of the normally-moving feeler lever and the normally-off feeler lever. And the extrusion force generated by the normally-moving feeler lever on the pressure control diaphragm and the extrusion force generated by the normally-broken feeler lever on the pressure control diaphragm are switched between positive number and zero. By adopting the technical scheme provided by the invention, the pressure control diaphragm is prevented from generating wrong response action caused by external personnel or external force, so that the running state of the microswitch can be maintained for a long time.

Description

Technical Field

[0001] This invention belongs to the field of micro switch technology, and particularly relates to a micro switch touch safety protection device. Background Technology

[0002] A micro switch is a pressure-activated, fast-changeover switch. It is named for its small contact spacing, and is also known as a flexible switch. A typical micro switch generally consists of a pressure-controlled diaphragm and an electrical switching device. The pressure-controlled diaphragm transmits external force to the electrical switching device, which then switches the electrical connection state.

[0003] For example, patent document CN106128807B discloses a microswitch triggering device and a microswitch module using the device. The microswitch triggering device includes a bracket with a oscillating force-transmitting component. The force-transmitting component has a clearance groove. Two groove walls close to the groove opening respectively form a first contour surface for pressing the trigger button of the microswitch and a second contour surface symmetrical about a first plane of symmetry. The rotation axis of the force-transmitting component is on the first plane of symmetry. The force-transmitting component also has a first contact portion that contacts the trigger element and a second contact portion symmetrical about a second plane of symmetry. The force-transmitting component has a free position, a first direction trigger position, and a second direction trigger position opposite to the first direction trigger position. The microswitch device also includes a reset mechanism for resetting the force-transmitting component from the first and second direction trigger positions to the free position. This patented technology achieves bidirectional, same-position triggering of the microswitch.

[0004] However, in existing microswitches, the pressure-controlled diaphragm is usually directly exposed to the external environment. On the one hand, the pressure-controlled diaphragm is easily damaged by oxidation or by chemical substances in the external environment. On the other hand, external personnel or external forces can easily cause the pressure-controlled diaphragm to respond, thereby causing the microswitch to switch its operating state incorrectly. In addition, the response stroke of the pressure-controlled diaphragm is short. After the operator causes the microswitch to switch its operating state by pressing with their finger, the operating state of the microswitch is often difficult to maintain for a long time. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a micro-switch touch safety protection device.

[0006] This invention provides a microswitch touch safety protection device, including a microswitch, a cylindrical shell, a positioning pin, a limiting pin, a limiting spring, a normally moving contact rod, and a normally closed contact rod. The microswitch has a pressure-controlled diaphragm. The cylindrical shell has a base and a positioning seat inside. The base is also fixedly connected to one end of a guide tube. The pressure-controlled diaphragm is fitted onto the other end of the guide tube. The surface of the positioning seat has a limiting hole. The positioning pin is screwed to one end of the limiting hole. The limiting pin is fitted onto the other end of the limiting hole. The limiting spring is clamped between the limiting pin and the positioning pin. The surfaces of the normally moving contact rod and the normally closed contact rod are both provided with limiting grooves. When the normally moving contact rod and the normally closed contact rod are switched within the guide tube, and the limiting pin is inserted into the limiting groove, the squeezing force generated by the normally moving contact rod on the pressure-controlled diaphragm and the squeezing force generated by the normally closed contact rod on the pressure-controlled diaphragm switch between positive and zero.

[0007] The micro switch is also fixedly connected to the cover, the cover is also fixedly connected to the base and the guide cylinder, and the positioning seat is clamped between the base and the cover.

[0008] The base and the guide cylinder are manufactured as a single piece.

[0009] The number of limiting pins is even, and they are evenly distributed on the left and right sides of the guide tube. The even number of limiting pins are also distributed in a linear array along the axial direction of the guide tube.

[0010] The number of limit pins is 4.

[0011] The micro switch touch safety protection device also includes a sealing gasket. The cylindrical shell is also provided with a support platform. The surface of the support platform is provided with a lead hole, which communicates with the guide tube. The normally moving contact rod and the normally disconnected contact rod are also fixedly connected to the end platform. When the normally moving contact rod and the normally disconnected contact rod are switched in the guide tube, the end platform covers the opening end of the cylindrical shell, and the sealing gasket is clamped between the end platform and the support platform.

[0012] The micro-switch touch safety protection device also includes a base plate, a locking spring, and a locking sleeve. The surface of the base plate is provided with a positioning hole, and the inner wall of the locking sleeve is provided with a locking pin. The outer circumferential surface of the cylindrical shell is also provided with an annular guide groove and an axial blind groove. The annular guide groove and the axial blind groove are connected. When the cylindrical shell passes through the positioning hole, the locking spring, and the locking sleeve in sequence, the elastic force generated by the locking spring causes the locking pin to slide from the annular guide groove into the axial blind groove.

[0013] The outer circumferential surface of the cylindrical shell is also provided with an axial guide groove, which is connected to the annular guide groove. When the cylindrical shell passes through the locking sleeve, the locking pin slides into the annular guide groove along the axial guide groove.

[0014] The inner wall of the positioning hole is also provided with an anti-rotation platform, and the outer circumferential surface of the cylindrical shell is also provided with an anti-rotation groove. When the cylindrical shell passes through the positioning hole, the anti-rotation platform is fitted into the anti-rotation groove.

[0015] The surface of the cylindrical shell is also provided with an annular groove, and a sealing gasket is provided in the annular groove. When the cylindrical shell passes through the positioning hole, the sealing gasket is clamped between the bottom plate and the cylindrical shell.

[0016] The outer surface of the locking sleeve is also provided with knurling.

[0017] The beneficial effects of this invention are as follows: When the normally moving contact rod or normally closed contact rod is fitted into the guide tube using the technical solution provided by this invention, the normally moving contact rod or normally closed contact rod shields the pressure-controlled diaphragm, preventing the pressure-controlled diaphragm from being damaged by chemical substances in the external environment, thus protecting the micro switch and extending its service life. In addition, because the normally moving contact rod or normally closed contact rod shields the pressure-controlled diaphragm, it prevents external personnel or external forces from causing the pressure-controlled diaphragm to make incorrect response actions. The normally moving contact rod or normally closed contact rod also extends the response stroke of the pressure-controlled diaphragm. When the operator causes the micro switch to switch its operating state by using the normally moving contact rod, the limiting pin engages in the limiting groove, allowing the micro switch to maintain its operating state for a long time. Similarly, when the operator shields the guide tube by using the normally closed contact rod, the micro switch's operating state is also maintained for a long time. Attached Figure Description

[0018] Figure 1 This is an isometric view of the present invention; Figure 2 This is a front view of the normally movable contact rod of the present invention being fitted inside the guide tube; Figure 3 This is a front view of the normally disconnected contact rod of the present invention being fitted into the guide tube; Figure 4 This is an isometric view of the normally movable contact rod, end plate, and protruding shank of the present invention; Figure 5 This is a front view of the normally movable contact rod, end plate, and protruding shank of the present invention; Figure 6 This is a front view of the normally disconnected contact rod, end plate, and protruding shank of the present invention; Figure 7 This is a right view of the normally broken contact rod, end plate, and protruding shank of the present invention; Figure 8 This is an isometric view of the base, cover, positioning bolt, limiting pin, and limiting spring of the present invention; Figure 9 This is a front view of the base, cover, positioning bolt, limiting pin, and limiting spring of the present invention; Figure 10 This is an isometric view of the micro switch of the present invention; Figure 11 This is an isometric view of the cylindrical shell of the present invention; Figure 12 This is an isometric view of the locking sleeve of the present invention; Figure 13 This is a top view of the base plate of the present invention.

[0019] In the diagram: 1-Micro switch, 2-Cylinder shell, 3-Positioning bolt, 4-Limiting pin, 5-Limiting spring, 6-Normal moving contact rod, 7-Normal disconnecting contact rod, 8-Pressure-controlled diaphragm, 9-Base, 10-Positioning seat, 11-Limiting hole, 12-Limiting groove, 13-Guide cylinder, 14-Cover seat, 15-Sealing gasket, 16-Support platform, 17-Lead hole, 18-End platform, 19-Protruding handle, 20-Key ring, 21-Base plate, 22-Locking leaf spring, 23-Locking sleeve, 24-Positioning hole, 25-Snap pin, 26-Annular guide groove, 27-Axial blind groove, 28-Axial guide groove, 29-Anti-rotation platform, 30-Anti-rotation groove, 31-Annular recessed groove, 32-Knurling. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited thereto; This invention provides a micro-switch touch safety protection device, such as... Figures 1 to 13 As shown, the device includes a micro switch 1, a cylindrical shell 2, a positioning pin 3, a limiting pin 4, a limiting spring 5, a normally moving contact rod 6, and a normally closed contact rod 7. The micro switch 1 has a pressure-controlled diaphragm 8. The cylindrical shell 2 has a base 9 and a positioning seat 10. The base 9 is also fixedly connected to one end of the guide tube 13. The pressure-controlled diaphragm 8 is fitted onto the other end of the guide tube 13. The surface of the positioning seat 10 has a limiting hole 11. The positioning pin 3 is screwed into one end of the limiting hole 11. The limiting pin 4 is fitted onto the other end of the limiting hole 11. The limiting spring 5 is clamped between the limiting pin 4 and the positioning pin 3. Between them, the surfaces of the normally moving contact rod 6 and the normally disconnected contact rod 7 are provided with limiting grooves 12. When the normally moving contact rod 6 and the normally disconnected contact rod 7 are switched in the guide tube 13 and the limiting pin 4 is inserted into the limiting groove 12, the squeezing force generated by the normally moving contact rod (6) on the pressure control diaphragm (8) and the squeezing force generated by the normally disconnected contact rod (7) on the pressure control diaphragm (8) switch between positive and zero. Correspondingly, the distance between the pressure control diaphragm 8 and the normally disconnected contact rod 7 and the distance between the pressure control diaphragm 8 and the normally moving contact rod 6 switch between positive and zero.

[0021] Using the technical solution provided by this invention, when the normally moving contact rod or normally closed contact rod is fitted into the guide tube, the normally moving contact rod or normally closed contact rod shields the pressure-controlled diaphragm, protecting the pressure-controlled diaphragm from damage caused by chemical substances in the external environment, thus protecting the micro switch and extending its service life. In addition, because the normally moving contact rod or normally closed contact rod shields the pressure-controlled diaphragm, it prevents external personnel or external forces from causing the pressure-controlled diaphragm to make incorrect response actions. The normally moving contact rod or normally closed contact rod also extends the response stroke of the pressure-controlled diaphragm. When the operator causes the micro switch to switch its operating state by using the normally moving contact rod, the limit pin engages in the limit groove, allowing the micro switch to maintain its operating state for a long time. Similarly, when the operator shields the guide tube by using the normally closed contact rod, the micro switch's operating state is also maintained for a long time.

[0022] In addition, there are more than two limit slots (12). When the limit pin 4 is inserted into the limit slot 12, the limit pin 4 and the limit slot 12 will collide and make a sound. When the operator inserts the normally moving contact rod into the guide tube 13, the operator can determine whether the normally moving contact rod or the normally closed contact rod is assembled in the external environment of the micro switch touch safety protection device based on the sound feedback. In addition, the operator can also count the collision sound of the limit pin 4 and the limit slot 12 during the process of the normally moving contact rod being inserted into the guide tube 13 according to the preset number of limit slots (12). When the operator's count is equal to the preset number of limit slots (12), the operator can ensure that the normally moving contact rod or the normally closed contact rod is assembled in place.

[0023] Specifically, the micro switch 1 is also fixedly connected to the cover 14, the cover 14 is also fixedly connected to the base 9 and the guide cylinder 13, and the positioning seat 10 is clamped between the base 9 and the cover 14. Preferably, the base 9 and the guide cylinder 13 are integrally manufactured.

[0024] Furthermore, the number of limiting pins 4 is even, and they are evenly distributed on the left and right sides of the guide tube 13. The even number of limiting pins 4 are also distributed in a linear array along the axial direction of the guide tube 13. Preferably, the number of limiting pins 4 is 4. Using the technical solution of the present invention, when the normally moving contact rod or normally closed contact rod is sleeved in the guide tube, under the elastic force of the limiting spring 5, several limiting pins 4 are simultaneously sleeved in the corresponding limiting grooves 12, preventing the normally moving contact rod or normally closed contact rod from loosening, so that the micro switch can maintain its operating state for a long time.

[0025] In addition, the microswitch touch safety protection device also includes a sealing gasket 15, and a support platform 16 is provided inside the shell 2. The surface of the support platform 16 is provided with a lead hole 17, which communicates with the guide tube 13. The normally moving contact rod 6 and the normally closed contact rod 7 are also fixedly connected to the end platform 18. When the normally moving contact rod 6 and the normally closed contact rod 7 are switched in the guide tube 13, the end platform 18 covers the open end of the shell 2, and the sealing gasket 15 is clamped between the end platform 18 and the support platform 16. With the technical solution of the present invention, since the sealing gasket 15 has some elasticity, on the one hand, the sealing gasket 15 seals the open end of the shell 2, further preventing chemical substances in the external environment from damaging the pressure control diaphragm. On the other hand, the pre-tightening force generated by the compression deformation of the sealing gasket 15 enables the normally moving contact rod or the normally closed contact rod to maintain a stable relative position, so that the microswitch can maintain its operating state for a long time.

[0026] Specifically, the end of the normally moving contact 6 or the normally closed contact 7 is frustum-shaped. The end plate 18 is also fixedly connected to the protruding handle 19. The protruding handle 19 is also connected to the key ring 20 through a sleeve.

[0027] In addition, the micro switch touch safety protection device also includes a base plate 21, a locking spring 22, and a locking sleeve 23. The surface of the base plate 21 is provided with a positioning hole 24, the inner wall of the locking sleeve 23 is provided with a locking pin 25, and the outer circumferential surface of the cylindrical shell 2 is also provided with an annular guide groove 26 and an axial blind groove 27. The annular guide groove 26 and the axial blind groove 27 are connected. When the cylindrical shell 2 passes through the positioning hole 24, the locking spring 22, and the locking sleeve 23 in sequence, the elastic force generated by the locking spring 22 causes the locking pin 25 to slide from the annular guide groove 26 into the axial blind groove 27.

[0028] Specifically, the outer circumferential surface of the cylindrical shell 2 is also provided with an axial guide groove 28, which communicates with the annular guide groove 26. When the cylindrical shell 2 passes through the locking sleeve 23, the locking pin 25 slides along the axial guide groove 28 into the annular guide groove 26. In the prior art, when the micro switch is fixed to the base plate, several bolts, nuts and other fasteners are often required. Tightening these bolts and nuts requires a lot of labor time for the operator, resulting in low labor efficiency. With the technical solution of this invention, when the invention is fixed to the base plate, when the cylindrical shell 2 passes through the positioning hole 24, the locking leaf spring 22 and the locking sleeve 23 in sequence, the elastic force generated by the locking leaf spring 22 causes the locking pin 25 to slide from the annular guide groove 26 into the axial blind groove 27. This allows the micro switch to be fixed to the base plate without the need for bolts, nuts and other fasteners, simplifying the assembly operation process of this invention and improving labor efficiency.

[0029] In addition, the inner wall of the positioning hole 24 is provided with an anti-rotation platform 29, and the outer circumferential surface of the cylindrical shell 2 is provided with an anti-rotation groove 30. When the cylindrical shell 2 passes through the positioning hole 24, the anti-rotation platform 29 fits into the anti-rotation groove 30.

[0030] Specifically, the surface of the cylindrical shell 2 is also provided with an annular groove 31, and a sealing gasket 15 is provided in the annular groove 31. When the cylindrical shell 2 passes through the positioning hole 24, the sealing gasket 15 is clamped between the base plate 21 and the cylindrical shell 2. The outer surface of the locking sleeve 23 is also provided with knurling 32. With the technical solution of the present invention, when the present invention is fixed to the base plate, the outer surface of the locking sleeve 23 is also provided with knurling 32, which can prevent the operator from slipping. The sealing gasket 15 is clamped between the base plate 21 and the cylindrical shell 2, which improves the interface sealing between the present invention and the base plate. The anti-rotation platform 29 is set and fitted into the anti-rotation groove 30, which can prevent the present invention from rotating along the surface of the base plate.

Claims

1. A micro-switch touch safety protection device, characterized in that: Includes a micro switch (1), a cylindrical shell (2), a positioning bolt (3), a limiting pin (4), a limiting spring (5), a normally moving contact rod (6), and a normally closed contact rod (7). The micro switch (1) has a pressure-controlled diaphragm (8). The cylindrical shell (2) is provided with a base (9) and a positioning seat (10). The base (9) is also fixedly connected to one end of the guide tube (13). The pressure-controlled diaphragm (8) is fitted onto the other end of the guide tube (13). The surface of the positioning seat (10) is provided with a limiting hole (11). The positioning bolt (3) is screwed to one end of the limiting hole (11). The limiting pin (4) is fixedly connected to the guide tube (5). The limit spring (5) is fitted onto the other end of the limiting hole (11), and the limit spring (5) is clamped between the limit pin (4) and the positioning bolt (3). The surfaces of the normally moving contact rod (6) and the normally disconnected contact rod (7) are provided with limiting grooves (12). When the normally moving contact rod (6) and the normally disconnected contact rod (7) are switched in the guide tube (13) and the limit pin (4) is inserted into the limiting groove (12), the squeezing force generated by the normally moving contact rod (6) on the pressure control diaphragm (8) and the squeezing force generated by the normally disconnected contact rod (7) on the pressure control diaphragm (8) switch between positive and zero.

2. The micro switch touch safety protection device as described in claim 1, characterized in that: The micro switch (1) is also fixedly connected to the cover (14), the cover (14) is also fixedly connected to the base (9) and the guide cylinder (13), and the positioning seat (10) is clamped between the base (9) and the cover (14).

3. A micro switch touch safety protection device as described in claim 1 or 2, characterized in that: The base (9) and the guide tube (13) are manufactured as a single piece.

4. The micro switch touch safety protection device as described in claim 1, characterized in that: The number of the limiting pins (4) is even, and they are distributed equally on the left and right sides of the guide tube (13). The even number of limiting pins (4) are also distributed in a linear array along the axial direction of the guide tube (13).

5. The micro switch touch safety protection device as described in claim 4, characterized in that: The number of the limiting pins (4) is 4.

6. The micro switch touch safety protection device as described in claim 1, characterized in that: The micro switch touch safety protection device also includes a sealing gasket (15), and a support platform (16) is provided inside the cylindrical shell (2). The surface of the support platform (16) is provided with a lead hole (17), which is connected to the guide tube (13). The normally moving contact rod (6) and the normally disconnected contact rod (7) are also fixedly connected to the end platform (18). When the normally moving contact rod (6) and the normally disconnected contact rod (7) are switched inside the guide tube (13), the end platform (18) covers the opening end of the cylindrical shell (2), and the sealing gasket (15) is clamped between the end platform (18) and the support platform (16).

7. The micro switch touch safety protection device as described in claim 1, characterized in that: The micro-switch touch safety protection device also includes a base plate (21), a locking spring (22), and a locking sleeve (23). The surface of the base plate (21) is provided with a positioning hole (24), and the inner wall of the locking sleeve (23) is provided with a locking pin (25). The outer circumferential surface of the cylindrical shell (2) is also provided with an annular guide groove (26) and an axial blind groove (27). The annular guide groove (26) and the axial blind groove (27) are connected. When the cylindrical shell (2) passes through the positioning hole (24), the locking spring (22), and the locking sleeve (23) in sequence, the elastic force generated by the locking spring (22) causes the locking pin (25) to slide from the annular guide groove (26) into the axial blind groove (27).

8. The micro switch touch safety protection device as described in claim 6, characterized in that: The outer circumferential surface of the cylindrical shell (2) is also provided with an axial guide groove (28), which is connected to the annular guide groove (26). When the cylindrical shell (2) passes through the locking sleeve (23), the locking pin (25) slides into the annular guide groove (26) along the axial guide groove (28).

9. A micro switch touch safety protection device as described in claim 6, characterized in that: The inner wall of the positioning hole (24) is also provided with an anti-rotation platform (29), and the outer circumferential surface of the cylindrical shell (2) is also provided with an anti-rotation groove (30). When the cylindrical shell (2) passes through the positioning hole (24), the anti-rotation platform (29) fits into the anti-rotation groove (30).

10. A micro switch touch safety protection device as described in claim 6, characterized in that: The surface of the cylindrical shell (2) is also provided with an annular groove (31), and a sealing gasket (15) is provided in the annular groove (31). When the cylindrical shell (2) passes through the positioning hole (24), the sealing gasket (15) is clamped between the bottom plate (21) and the cylindrical shell (2).

11. A micro switch touch safety protection device as described in claim 6, characterized in that: The outer surface of the locking sleeve (23) is also provided with knurling (32).

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