Anti-collision travel switch
By designing a simple anti-collision limit switch, utilizing the principles of rocker arm transmission and lever, and combining it with a metal reinforcement structure, the problems of complex structure, high cost, and poor impact resistance of existing limit switches have been solved, resulting in a low-cost, highly stable, and highly adaptable limit switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG KACON ELECTRIC
- Filing Date
- 2025-06-05
- Publication Date
- 2026-07-07
AI Technical Summary
Existing limit switches suffer from problems such as complex structure, numerous parts, difficult processing, high cost, poor impact resistance, and poor stability, making it difficult to meet the design requirements of miniaturization, lightweighting, and low cost.
The anti-collision limit switch adopts a simple structure design, including a housing, a first return spring, a moving contact, and a stationary contact. It utilizes the principle of rocker arm transmission and lever, and drives the rocker arm to swing left and right through the limiting boss. The sliding column connects or disconnects the moving contact and the stationary contact. The housing is reinforced by a metal base plate and a hard alloy reinforcing plate. The return spring is used to achieve the reset and anti-collision effects.
This invention achieves a limit switch with simple structure, low cost, good impact resistance, high stability and strong practicality, which is suitable for limit switch designs of different heights and meets the requirements of miniaturization and lightweighting.
Smart Images
Figure CN224472379U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of limit switch technology, specifically to an anti-collision limit switch. Background Technology
[0002] Limit switches, also known as travel switches, are devices that switch electrical signals based on the travel position of moving parts. In some equipment manufacturing processes, limit switches are required to be miniaturized, lightweight, and structurally simple, while also meeting high environmental standards and low manufacturing costs. This presents many design challenges. For example, some existing limit switches suffer from complex structures, numerous components, difficult component processing, and high costs. Furthermore, limit switches have poor shock resistance, resulting in poor stability and practicality in actual use. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an anti-collision limit switch with reasonable structural design, simple structure, low manufacturing cost, good impact resistance, good stability and practicality.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-collision limit switch, comprising a housing, a first return spring, a moving contact, and a stationary contact. A metal base plate is provided at the bottom of the housing. A vertical through hole is provided at the left end of the upper surface of the housing, and a switch button is provided within the vertical through hole. A limiting boss is integrally provided at the lower end of the switch button. A hard alloy reinforcing plate is fixedly provided at the position of the upper surface of the metal base plate aligned with the lower surface of the limiting boss. A spring positioning groove is provided at the position of the upper surface of the hard alloy reinforcing plate aligned with the lower surface of the limiting boss. The first return spring is disposed between the inner bottom surface of the spring positioning groove and the lower surface of the limiting boss. A rocker arm is provided at the right end of the limiting boss. A positioning shaft is provided at the upper end of the rocker arm. A sliding column is provided at the right end of the rocker arm. The right end of the sliding column is fixedly connected to the moving contact. A second return spring is provided at the right end of the sliding column.
[0005] The right end of the housing is provided with a right through hole, and a fixing block is provided in the right through hole. The stationary contact is fixedly connected to the left end face of the fixing block. The switch button drives the swing rod to swing left and right through the limiting boss. The swing rod drives the sliding column to move left and right. The moving contact is linked with the sliding column. The left and right movement of the sliding column realizes the connection or disconnection between the moving contact and the stationary contact.
[0006] Several left anti-collision protrusions are integrally provided on the left end face of the housing, and several upper anti-collision protrusions are integrally provided on the upper end face of the housing.
[0007] The metal base plate is detachably or fixedly disposed from the lower end face of the housing, and both the left and right ends of the metal base plate are integrally provided with mounting protrusions, and each mounting protrusion is provided with at least one mounting through hole.
[0008] The present invention is further configured such that: the inner wall surface of the housing is provided with a positioning groove aligned with the position of the sliding column, the positioning groove is arranged laterally in the left-right direction, the sliding column is installed in the positioning groove, and a moving contact mounting protrusion is integrally provided on the right end of the sliding column, and the left end of the moving contact is integrally provided with the right end face of the moving contact mounting protrusion or fixed by welding or by screw connection.
[0009] The present invention is further configured such that: the upper end of the swing rod is hinged to the inner wall of the housing through a positioning shaft; the lower end of the swing rod is bent downward to the left, the left end of the swing rod abuts against the right end face of the limiting boss, the right end of the swing rod abuts against the left end of the sliding column, and the left end face of the sliding column is an arc-shaped arch surface.
[0010] The present invention is further configured such that: the fixing block is fixed to the right end face of the housing by screws, a conductive sheet is integrally provided on the right end of the stationary contact, a conductive sheet mounting through hole is provided in the fixing block, the right end of the conductive sheet passes through the conductive sheet mounting through hole, and a wiring through hole is provided on the section of the conductive sheet exposed above the conductive sheet mounting through hole.
[0011] The present invention is further configured such that: a second spring positioning groove is provided on the left end face of the fixed block, the left end face of the second reset spring abuts against the right end face of the sliding column, and the right end face of the second reset spring abuts against the right inner wall surface of the second spring positioning groove.
[0012] The present invention is further configured such that: a first sealing ring mounting groove is provided on the inner wall surface of the vertical through hole, and a first sealing ring is provided in the first sealing ring mounting groove; the switch button forms a seal between itself and the inner wall surface of the vertical through hole through the first sealing ring; a second sealing ring mounting groove is provided on the inner wall surface of the right through hole, and a second sealing ring is provided in the second sealing ring mounting groove; the fixing block forms a seal between itself and the inner wall surface of the right through hole through the second sealing ring.
[0013] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model has a reasonable structural design. When the switch button is pressed, the switch button drives the rocker arm to swing left and right through the limiting boss. The rocker arm drives the sliding column to move left and right. The moving contact is linked with the sliding column. The left and right movement of the sliding column realizes the connection or disconnection of the moving contact and the stationary contact. The sliding column is reset by the second reset spring, and the switch button is reset by the first reset spring. The metal base plate and hard alloy reinforcing plate can strengthen the bottom of the shell. The left anti-collision protrusion and the upper anti-collision protrusion respectively strengthen the left end face and the upper end face of the shell, resulting in good anti-collision effect.
[0014] This embodiment of the anti-collision limit switch uses a lever drive, utilizing the lever principle. It is suitable for limit switch structural designs with equal height and large stroke, as well as limit switch designs with equal stroke and compact structure, making it more adaptable. It has a simple structure, low manufacturing cost, good impact resistance, good stability, and good practicality.
[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0017] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present utility model. Detailed Implementation
[0018] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0019] See Figure 1 and Figure 2 This utility model discloses an anti-collision limit switch, including a housing 1, a first return spring 2, a moving contact 3, and a stationary contact 4. A metal base plate 5 is provided at the bottom of the housing 1. A vertical through hole is provided at the left end of the upper surface of the housing 1. A switch button 6 is provided in the vertical through hole. A limiting boss 61 is integrally provided at the lower end of the switch button 6. A hard alloy reinforcing plate 7 is fixedly provided at the position of the upper surface of the metal base plate 5 aligned with the lower surface of the limiting boss 61. A spring positioning groove 71 is provided at the position of the upper surface of the hard alloy reinforcing plate 7 aligned with the lower surface of the limiting boss 61. The first return spring 2 is provided between the inner bottom surface of the spring positioning groove 71 and the lower surface of the limiting boss 61. A rocker arm 8 is provided at the right end of the limiting boss 61. A positioning shaft 81 is provided at the upper end of the rocker arm 8. A sliding column 9 is provided at the right end of the rocker arm 8. The right end of the sliding column 9 is fixedly connected to the moving contact 3. A second return spring 10 is provided at the right end of the sliding column 9.
[0020] The right end of the housing 1 is provided with a right through hole, and a fixing block 11 is provided in the right through hole. The stationary contact 4 is fixedly connected to the left end face of the fixing block 11. The switch button 6 drives the swing rod 8 to swing left and right through the limiting boss 61. The swing rod 8 drives the sliding column 9 to move left and right. The moving contact 3 is linked with the sliding column 9. The left and right movement of the sliding column 9 realizes the connection or disconnection between the moving contact 3 and the stationary contact 4.
[0021] Several left anti-collision protrusions 12 are integrally provided on the left end face of the housing 1, and several upper anti-collision protrusions 13 are integrally provided on the upper end face of the housing 1.
[0022] The metal base plate 5 is detachably or fixedly disposed from the lower end face of the housing 1, and both the left and right ends of the metal base plate 5 are integrally provided with mounting protrusions 51, and each mounting protrusion 51 is provided with at least one mounting through hole 511.
[0023] Preferably, the metal base plate 5 is fixed to the lower end face of the housing 1 by screws; the metal base plate 5 is made of stainless steel, and the housing 1 is made of engineering plastic or stainless steel; the hard alloy reinforcing plate 7 is fixed to the metal base plate 5 by welding or by screws; the number of left anti-collision protrusions 12 is 1-4, and the left anti-collision protrusions 12 are all rectangular or arc-shaped structures; the number of upper anti-collision protrusions 13 is 2-8, and the upper anti-collision protrusions 13 are all rectangular or arc-shaped structures.
[0024] In this embodiment, both the moving contact 3 and the stationary contact 4 are provided with 2-3 units.
[0025] To make the structural design of this utility model more reasonable, as a preferred embodiment, the inner wall surface of the housing 1 is provided with a positioning groove 14 aligned with the sliding column position. The positioning groove 14 is arranged laterally in the left-right direction. The sliding column 9 is installed in the positioning groove 14. The right end of the sliding column 9 is integrally provided with a moving contact mounting protrusion 91. The left end of the moving contact 3 is integrally provided with the right end face of the moving contact mounting protrusion 91, or is fixed by welding or by screw connection.
[0026] The upper end of the swing rod 8 is hinged to the inner wall of the housing 1 through the positioning shaft 81; the lower end of the swing rod 8 is bent to the lower left, the left end of the swing rod 8 abuts against the right end face of the limiting boss 61, the right end of the swing rod 8 abuts against the left end of the sliding column 9, and the left end face of the sliding column 9 is an arc-shaped arch surface.
[0027] The fixing block 11 is fixed to the right end face of the housing 1 by screws. A conductive sheet 41 is integrally provided on the right end of the stationary contact 4. A conductive sheet mounting through hole is provided in the fixing block 11. The right end of the conductive sheet 41 passes through the conductive sheet mounting through hole, and a wiring through hole 411 is provided on the section of the conductive sheet 41 exposed above the conductive sheet mounting through hole. Preferably, the conductive sheet 41 is bonded and fixed to the inner wall surface of the aligned conductive sheet mounting through hole.
[0028] The left end face of the fixed block 11 is provided with a second spring positioning groove 111, the left end face of the second reset spring 10 abuts against the right end face of the sliding column 9, and the right end face of the second reset spring 10 abuts against the right inner wall surface of the second spring positioning groove 111.
[0029] A first sealing ring mounting groove is provided on the inner wall surface of the vertical through hole, and a first sealing ring 15 is provided in the first sealing ring mounting groove. The switch button 6 forms a seal between itself and the inner wall surface of the vertical through hole through the first sealing ring 15. A second sealing ring mounting groove is provided on the inner wall surface of the right through hole, and a second sealing ring 16 is provided in the second sealing ring mounting groove. The fixing block 11 forms a seal between itself and the inner wall surface of the right through hole through the second sealing ring 16.
[0030] In practical applications, when the switch button is pressed, the switch button drives the rocker arm to swing left and right through the limiting boss. The rocker arm drives the sliding column to move left and right. The moving contact is linked with the sliding column. The left and right movement of the sliding column realizes the connection or disconnection between the moving contact and the stationary contact. The sliding column is reset by the second return spring, and the switch button is reset by the first return spring. The metal base plate and hard alloy reinforcing plate can strengthen the bottom of the housing. The left anti-collision bump and the upper anti-collision bump can strengthen the left end face and the upper end face of the housing, respectively, and the anti-collision effect is good.
[0031] This embodiment of the anti-collision limit switch adopts a lever drive, utilizing the lever principle. It is suitable for limit switch structural designs with equal height and large stroke, as well as limit switch designs with equal stroke and compact structure, making it more adaptable. It features a reasonable structural design, simple structure, low manufacturing cost, good impact resistance, good stability, and good practicality.
[0032] The above description of the specific embodiments of this utility model is only used to further illustrate this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made to this utility model by technical engineers based on the above description of the utility model shall fall within the scope of protection of this utility model.
Claims
1. An anti-collision limit switch, comprising a housing (1), a first return spring (2), a moving contact (3), and a stationary contact (4), characterized in that: The bottom of the housing (1) is provided with a metal base plate (5). A vertical through hole is provided on the left side of the upper end face of the housing (1). A switch button (6) is provided in the vertical through hole. A limiting boss (61) is integrally provided on the lower end of the switch button (6). A hard alloy reinforcing plate (7) is fixedly provided on the upper end face of the metal base plate (5) aligned with the lower end face of the limiting boss (61). A hard alloy reinforcing plate (7) is fixedly provided on the upper end face of the hard alloy reinforcing plate (7) aligned with the lower end face of the limiting boss (61). A spring positioning groove (71) is provided. The first reset spring (2) is located between the inner bottom surface of the spring positioning groove (71) and the lower end surface of the limiting boss (61). A rocker arm (8) is provided at the right end of the limiting boss (61). A positioning shaft (81) is provided at the upper end of the rocker arm (8). A sliding column (9) is provided at the right end of the rocker arm (8). The right end of the sliding column (9) is fixedly connected to the moving contact (3). A second reset spring (10) is provided at the right end of the sliding column (9). The right end of the housing (1) is provided with a right through hole, and a fixing block (11) is provided in the right through hole. The stationary contact (4) is fixedly connected to the left end face of the fixing block (11). The switch button (6) drives the swing rod (8) to swing left and right through the limiting boss (61). The swing rod (8) drives the sliding column (9) to move left and right. The moving contact (3) is linked with the sliding column (9). The moving contact (3) and the stationary contact (4) are connected or disconnected through the left and right movement of the sliding column (9). Several left anti-collision protrusions (12) are integrally provided on the left end face of the housing (1), and several upper anti-collision protrusions (13) are integrally provided on the upper end face of the housing (1). The metal base plate (5) is detachably or fixedly disposed from the lower end face of the housing (1), and the metal base plate (5) is integrally provided with mounting protrusions (51) at both the left and right ends, and each mounting protrusion (51) is provided with at least one mounting through hole (511).
2. The anti-collision limit switch according to claim 1, characterized in that: The inner wall of the housing (1) is provided with a positioning groove (14) aligned with the position of the sliding column. The positioning groove (14) is arranged laterally in the left and right direction. The sliding column (9) is installed in the positioning groove (14). The right end of the sliding column (9) is integrally provided with a moving contact mounting protrusion (91). The left end of the moving contact (3) is integrally provided with the right end face of the moving contact mounting protrusion (91) or fixed by welding or by screw connection.
3. The anti-collision limit switch according to claim 2, characterized in that: The upper end of the swing rod (8) is hinged to the inner wall of the housing (1) through the positioning shaft (81); the lower end of the swing rod (8) is bent to the lower left, the left end of the swing rod (8) abuts against the right end face of the limiting boss (61), the right end of the swing rod (8) abuts against the left end of the sliding column (9), and the left end face of the sliding column (9) is an arc-shaped arch surface.
4. The anti-collision limit switch according to claim 3, characterized in that: The fixing block (11) is fixed to the right end face of the housing (1) by screws. The right end of the stationary contact (4) is integrally provided with a conductive sheet (41). The fixing block (11) is provided with a conductive sheet mounting through hole. The right end of the conductive sheet (41) passes through the conductive sheet mounting through hole, and the right end of the conductive sheet (41) exposed by the conductive sheet mounting through hole is provided with a wiring through hole (411).
5. The anti-collision limit switch according to claim 4, characterized in that: The left end face of the fixed block (11) is provided with a second spring positioning groove (111), the left end face of the second reset spring (10) abuts against the right end face of the sliding column (9), and the right end face of the second reset spring (10) abuts against the right inner wall of the second spring positioning groove (111).
6. The anti-collision limit switch according to claim 5, characterized in that: A first sealing ring mounting groove is provided on the inner wall surface of the vertical through hole, and a first sealing ring (15) is provided in the first sealing ring mounting groove. The switch button (6) forms a seal with the inner wall surface of the vertical through hole through the first sealing ring (15). A second sealing ring mounting groove is provided on the inner wall surface of the right through hole, and a second sealing ring (16) is provided in the second sealing ring mounting groove. The fixing block (11) forms a seal with the inner wall surface of the right through hole through the second sealing ring (16).