Knob switch

Abstract

The utility model relates to a knob switch, and relates to the technical field of control switches, the knob switch comprises a middle sleeve and a knob cover rotatably arranged at one end of the middle sleeve, the knob cover is fixedly provided with a knob rod located in the middle sleeve, and the middle sleeve is internally provided with a switch element capable of being controlled when the knob rod rotates; a pressure spring and a steel ball are arranged outside the rotary knob rod, a containing groove for containing the pressure spring and the steel ball is formed in the periphery of the rotary knob rod, a limiting sleeve arranged on the periphery of the rotary knob rod in a sleeving mode is fixedly arranged in the middle sleeve, and a plurality of limiting grooves are formed in the inner wall of the limiting sleeve. The steel balls can be inserted into the limiting grooves under the extrusion of the pressure springs; according to the invention, a clamping feeling exists during gear adjustment of the knob switch, so that the state of the knob switch at the moment can be reminded; the possibility of changing the state of the knob switch by external vibration can be reduced; therefore, the use performance of the knob switch is comprehensively improved.

Description

Technical Field

[0001] The present application relates to the technical field of control switches, and in particular to a knob switch. Background Art

[0002] Knob switches, as a common electrical control component, are widely used in electrical cabinets, especially in scenarios where electrical equipment needs to be precisely controlled and adjusted. The basic principle is to connect, disconnect or adjust the circuit through rotation, thereby controlling the operating status of the electrical equipment.

[0003] In the related art, the knob switch is a key component of the safety equipment. Its structure usually includes an operating head, a mounting seat, and a switch element equipped with a reset spring inside. This design allows the staff to press the switch element in the mounting seat by turning the operating head, thereby controlling the opening and closing of the electrical equipment. When the operating head is turned to a specific position, the switch element will automatically reset under the action of the reset spring.

[0004] However, although the design of the rotary switch can reliably control the opening and closing of electrical equipment under normal circumstances, in actual applications, when the rotary switch is turned to the closed or open state and fixed in a certain position, there are still potential safety hazards. In particular, when affected by external interference or vibration, the operating head may accidentally rotate autonomously, causing the electrical equipment to be accidentally shut down or started without authorization. This may not only interfere with the production process, but also pose a threat to the safety of equipment and personnel. Utility Model Content

[0005] The purpose of the present application is to provide a knob switch to solve the problem that the knob switch may be disturbed by external forces or affected by vibration when controlling the opening and closing of electrical equipment.

[0006] The present application provides a rotary switch adopting the following technical solution:

[0007] A knob switch comprises an intermediate sleeve and a knob cover rotatably arranged at one end of the intermediate sleeve, wherein the knob cover is fixedly provided with a knob rod located inside the intermediate sleeve, and the interior of the intermediate sleeve is provided with a switch element that can be controlled when the knob rod is rotated; the exterior of the knob rod is provided with a compression spring and a steel ball, and the outer circumference of the knob rod is provided with a placement groove for the compression spring and the steel ball to be placed, and the interior of the intermediate sleeve is fixedly provided with a limit sleeve sleeved on the outer circumference of the knob rod, and the inner wall of the limit sleeve is provided with a plurality of limit grooves, and the steel balls can be inserted into the limit grooves under the pressure of the compression spring.

[0008] By adopting the above technical scheme, due to the matching setting of the compression spring and the steel ball, when the knob rod rotates, a part of the steel ball can be inserted into the limit groove under the compression of the compression spring, so that there is a snapping feeling when the knob switch gear is adjusted, which is used to remind the state of the knob switch at this time; when there is external vibration or other external force, due to the snap-connection setting of the steel ball, it can also reduce the possibility of external vibration changing the state of the knob switch, thereby comprehensively improving the performance of the knob switch.

[0009] Optionally, a plurality of positioning protrusions are fixedly provided on the outer circumference of the limiting sleeve, and a positioning groove for inserting the positioning protrusions is formed on the inner wall of the intermediate sleeve.

[0010] By adopting the above technical solution, when the limiting sleeve is installed inside the middle sleeve, due to the matching setting of the positioning protrusion and the positioning groove, the positioning protrusion on the limiting sleeve is inserted into the positioning groove, thereby improving the assembly stability of the limiting sleeve and the middle sleeve.

[0011] Optionally, a limiting convex ring is fixedly provided on the outer circumference of the knob rod, and a plurality of clamping plates are fixedly provided on the side of the limiting sleeve facing the knob cover, and the clamping plates are provided with limiting clamping grooves for inserting the limiting convex ring.

[0012] By adopting the above technical solution, when the knob rod and the limit sleeve are assembled, the limit convex ring is inserted into the limit groove on the clamping plate. When the knob rod rotates relative to the limit sleeve, the limit convex ring slides inside the limit groove, thereby reducing the possibility of axial looseness or deviation of the knob rod and the limit sleeve.

[0013] Optionally, the number of the clamping plates is two, and a limiting clamping block located between the two clamping plates is fixedly provided on the outer periphery of the limiting convex ring, and the limiting clamping block can slide between the two clamping plates.

[0014] By adopting the above technical solution, due to the matching setting of the limit block, when the knob rod is rotated, the limit block can slide between the two cards, thereby limiting the rotation stroke of the knob rod and reducing the possibility of the knob switch being damaged due to excessive rotation.

[0015] Optionally, a guiding slope is provided on the side edge of the clamping plate facing the knob rod.

[0016] By adopting the above technical solution, due to the setting of the guiding inclined surface, it is convenient for the limiting protrusion to be inserted into the limiting groove on the card plate along the guiding inclined surface.

[0017] Optionally, a connecting sleeve for connecting with an intermediate sleeve is movably sleeved on the outer periphery of the knob cover, a retaining ring for limiting one end of the connecting sleeve is fixedly provided on the outer periphery of the knob cover, and the other end of the connecting sleeve is connected with the intermediate sleeve.

[0018] By adopting the above technical solution, after the connecting sleeve is installed, due to the matching arrangement of the retaining ring and the connecting sleeve, the connecting sleeve is used to axially limit the knob cover, thereby reducing the possibility of the knob cover loosening along its own axial direction.

[0019] Optionally, an internal thread is provided on the inner wall of one end of the connecting sleeve, and an external thread is provided on the outer periphery of the end of the intermediate sleeve facing the knob cover, which cooperates with the inner wall thread of the connecting sleeve; a tightening ring is fixed on the inner edge of the end opening of the connecting sleeve away from the intermediate sleeve, and one side of the tightening ring abuts against the side of the retaining ring away from the intermediate sleeve.

[0020] By adopting the above technical solution, during the installation of the knob switch, the threaded installation setting of the connecting sleeve facilitates the installation and disassembly of the connecting sleeve, thereby improving the efficiency of assembly and disassembly of the connecting sleeve.

[0021] Optionally, a lip sealing ring is fixedly sleeved on the outer periphery of the knob cover, the outer periphery of the lip sealing ring abuts against the inner wall of the limiting sleeve, and one side of the lip sealing ring abuts against the side of the retaining ring facing the middle sleeve.

[0022] By adopting the above technical solution, due to the setting of the lip-shaped sealing ring, the gap between the knob cover and the limiting sleeve is further sealed, reducing the possibility of external dust or other impurities entering the middle sleeve through the gap, strengthening the protection of the switch elements inside the middle sleeve, and improving the sealing protection performance of the knob switch.

[0023] Optionally, a snap ring is fixedly provided on the outer periphery of the knob cover, and the side of the lip seal ring away from the retaining ring abuts against one side of the snap ring.

[0024] By adopting the above technical solution, after the lip seal ring is installed, due to the matching arrangement of the retaining ring and the retaining ring, one side of the lip seal ring abuts against the side of the retaining ring facing the middle sleeve, and the side of the lip seal ring away from the retaining ring abuts against one side of the retaining ring, thereby improving the installation stability of the lip seal ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When the knob rod rotates, part of the steel ball can be inserted into the limit groove under the pressure of the compression spring, which can provide a sense of engagement when the knob switch is adjusted to remind the status of the knob switch at this time; when there is external vibration or other external force, the possibility of external vibration changing the status of the knob switch can be reduced due to the snap-fit ​​setting of the steel ball, thereby comprehensively improving the performance of the knob switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the explosion structure of an embodiment of the present application;

[0030] Figure 3 It is a cross-sectional structural diagram of the installation and matching of the switch element in the embodiment of the present application;

[0031] Figure 4 It is a cross-sectional structural schematic diagram of the embodiment of the present application showing the installation and cooperation between the elastic clamping member and the limiting sleeve;

[0032] Figure 5 It is a structural schematic diagram of the installation distribution of the elastic limiting sleeve and the intermediate sleeve in the embodiment of the present application;

[0033] Figure 6 It is a partial cross-sectional structural schematic diagram of the embodiment of the present application embodying the installation and matching of the connecting sleeve;

[0034] Figure 7 It is a structural schematic diagram of the installation distribution of the lip seal ring and the connecting sleeve according to an embodiment of the present application.

[0035] In the figure, 1. intermediate sleeve; 11. positioning groove; 12. fixing ring; 2. knob cover; 21. retaining ring; 22. snap ring; 3. knob rod; 31. placement groove; 32. limiting convex ring; 321. limiting block; 4. switch element; 5. elastic snap connector; 51. compression spring; 52. steel ball; 6. limiting sleeve; 61. limiting groove; 62. positioning convex block; 63. clamping plate; 631. limiting groove; 632. guiding slope; 7. connecting sleeve; 71. tightening ring; 8. lip sealing ring; 9. protective sleeve; 91. elastic gasket; 92. square gasket. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0037] Example:

[0038] Reference Figure 1 , Figure 2 and Figure 3A knob switch comprises an intermediate sleeve 1 and a knob cover 2 rotatably arranged at one end of the intermediate sleeve 1, a knob rod 3 located inside the intermediate sleeve 1 is fixedly arranged on the knob cover 2, and a switch element 4 is arranged inside the intermediate sleeve 1;

[0039] The switch element 4 is provided with a reset spring inside, and the switch element 4 is a conventional contact structure, which will not be described in detail here. When the user rotates the knob cover 2, the knob rod 3 is driven to rotate synchronously, and in this process, the switch element 4 inside the intermediate sleeve 1 is triggered (the contact is closed); when the knob cover 2 is rotated in the opposite direction to reset the knob cover 2, the switch element 4 will automatically reset (the contact is disconnected) under the action of the reset spring inside itself.

[0040] Refer to 3 and Figure 4 The knob rod 3 is provided with an elastic clamping member 5 on the outside, wherein the elastic clamping member 5 includes a compression spring 51 and two steel balls 52 at both ends of the compression spring 51, and a placement groove 31 for the compression spring 51 and the steel balls 52 is provided on the outer periphery of the knob rod 3; a limiting sleeve 6 is fixedly provided inside the intermediate sleeve 1 and sleeved on the outer periphery of the knob rod 3, and six limiting grooves 61 are provided on the inner wall of the limiting sleeve 6;

[0041] After the knob switch is assembled, a part of the steel ball 52 can be inserted into the limiting groove 61 under the pressure of the compression spring 51; the inner wall cross-section of the limiting groove 61 is an arc surface, and the arc length of the cross-section corresponding to the part of the steel ball 52 placed inside the limiting groove 61 is a minor arc; when the knob rod 3 is rotated to adjust the state of the knob switch, the steel ball 52 will move from the original limiting groove 61 to the adjacent limiting groove 61.

[0042] Reference Figure 5 Four positioning protrusions 62 are integrally formed on the outer periphery of the limiting sleeve 6, two positioning protrusions 62 form a group, and the two groups of positioning protrusions 62 are symmetrically arranged on the outer periphery of the limiting sleeve 6; at the same time, a positioning groove 11 for inserting the positioning protrusions 62 is opened on the inner wall of the intermediate sleeve 1; when the limiting sleeve 6 is installed inside the intermediate sleeve 1, the positioning protrusions 62 on the limiting sleeve 6 are inserted into the positioning groove 11.

[0043] Reference Figure 5 A limiting convex ring 32 is integrally formed on the outer periphery of the knob rod 3, and two clamping plates 63 are fixedly arranged on the side of the limiting sleeve 6 facing the knob cover 2. A guiding inclined surface 632 is arranged on the side edge of the clamping plate 63 facing the knob rod 3, and a limiting clamping groove 631 for inserting the limiting convex ring 32 is opened on the clamping plate 63;

[0044] When the knob rod 3 and the limiting sleeve 6 are assembled, the limiting convex ring 32 is inserted into the limiting groove 631 on the clamping plate 63 along the guiding inclined surface 632. When the knob rod 3 rotates relative to the limiting sleeve 6, the limiting convex ring 32 slides inside the limiting groove 631, thereby reducing the possibility of axial looseness or deviation of the knob rod 3 and the limiting sleeve 6.

[0045] Reference Figure 5 Two limiting blocks 321 are integrally formed on the outer periphery of the limiting convex ring 32. When the knob rod 3 and the limiting sleeve 6 are assembled, the limiting block 321 is located between the two clamping plates 63. When the knob rod 3 is rotated, the limiting block 321 can slide between the two clamping plates 63, thereby limiting the rotation stroke of the knob rod 3.

[0046] Reference Figure 6 and Figure 7 A connecting sleeve 7 for connecting with the intermediate sleeve 1 is movably sleeved on the outer circumference of the knob cover 2; a retaining ring 21 capable of abutting against the edge of the end of the intermediate sleeve 1 is integrally formed on the outer circumference of the knob cover 2, and the retaining ring 21 is used to limit one end of the connecting sleeve 7, and the other end of the connecting sleeve 7 is connected with the intermediate sleeve 1. When the connecting sleeve 7 is installed, the possibility of the knob cover 2 being loosened along its own axis direction is reduced.

[0047] Reference Figure 6 and Figure 7 An internal thread is formed on the inner wall of one end of the connecting sleeve 7, and an external thread that cooperates with the inner wall thread of the connecting sleeve 7 is provided on the outer periphery of the end of the intermediate sleeve 1 facing the knob cover 2; a tightening ring 71 is integrally formed on the inner edge of the opening of the end of the connecting sleeve 7 away from the intermediate sleeve 1, and one side of the tightening ring 71 abuts against the side of the retaining ring 21 away from the intermediate sleeve 1.

[0048] Reference Figure 6 and Figure 7 A lip sealing ring 8 is fixedly sleeved on the outer periphery of the knob cover 2, and a retaining ring 22 is integrally formed on the outer periphery of the knob cover 2; when the lip sealing ring 8 is installed, one side of the lip sealing ring 8 abuts against the side of the retaining ring 21 facing the middle sleeve 1, the side of the lip sealing ring 8 away from the retaining ring 21 abuts against one side of the retaining ring 22, and the outer periphery of the lip sealing ring 8 abuts against the inner wall of the limiting sleeve 6.

[0049] Reference Figure 6 A fixing ring 12 is integrally formed on the outer periphery of the intermediate sleeve 1, and a protective sleeve 9 is threadedly sleeved on the outer periphery of the intermediate sleeve 1. An installation gap is preset between the protective sleeve 9 and the fixing ring 12, and an elastic washer 91 and a square gasket 92 located in the installation gap are provided on the outer periphery of the intermediate sleeve 1. This arrangement facilitates the subsequent installation and fixation of the knob switch.

[0050] The implementation principle of the embodiment of the present application is:

[0051] Due to the coordinated arrangement of the elastic snap-fit ​​part 5 and the limiting groove 61, when the knob rod 3 rotates, a part of the steel ball 52 can be inserted into the limiting groove 61 under the compression of the compression spring 51, which not only provides a snap-fitting feeling to remind the user of the state of the knob switch at this time, but also reduces the possibility of external vibrations changing the state of the knob switch, thereby comprehensively improving the performance of the knob switch.

[0052] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A knob switch, comprising an intermediate sleeve (1) and a knob cover (2) rotatably arranged at one end of the intermediate sleeve (1), the knob cover (2) being fixedly provided with a knob rod (3) located inside the intermediate sleeve (1), and the intermediate sleeve (1) being provided with a switch element (4) that can be controlled by the knob rod (3) when it is rotated; It is characterized in that The knob rod (3) is provided with a compression spring (51) and a steel ball (52) on the outside, and a placement groove (31) for placing the compression spring (51) and the steel ball (52) is provided on the outer circumference of the knob rod (3). A limiting sleeve (6) sleeved on the outer circumference of the knob rod (3) is fixedly provided inside the intermediate sleeve (1), and a plurality of limiting grooves (61) are provided on the inner wall of the limiting sleeve (6), and the steel ball (52) can be inserted into the limiting grooves (61) under the pressure of the compression spring (51).

2. A knob switch according to claim 1, characterized in that: A plurality of positioning protrusions (62) are fixedly arranged on the outer periphery of the limiting sleeve (6), and a positioning groove (11) for inserting the positioning protrusions (62) is provided on the inner wall of the intermediate sleeve (1).

3. A knob switch according to claim 2, characterized in that: A limiting convex ring (32) is fixedly provided on the outer periphery of the knob rod (3), a plurality of clamping plates (63) are fixedly provided on the side of the limiting sleeve (6) facing the knob cover (2), and a limiting clamping groove (631) is provided on the clamping plate (63) for inserting the limiting convex ring (32).

4. A knob switch according to claim 3, characterized in that: The number of the clamping plates (63) is two, and a limiting clamping block (321) located between the two clamping plates (63) is fixedly provided on the outer periphery of the limiting convex ring (32), and the limiting clamping block (321) is capable of sliding between the two clamping plates (63).

5. The rotary switch according to claim 3, characterized in that: A guiding inclined surface (632) is provided on the side edge of the clamping plate (63) facing the knob rod (3).

6. The rotary switch according to claim 1, characterized in that: A connecting sleeve (7) for connecting with the intermediate sleeve (1) is movably sleeved on the outer circumference of the knob cover (2), a retaining ring (21) for limiting one end of the connecting sleeve (7) is fixedly provided on the outer circumference of the knob cover (2), and the other end of the connecting sleeve (7) is connected with the intermediate sleeve (1).

7. The rotary switch according to claim 6, characterized in that: An inner wall of one end of the connecting sleeve (7) is provided with an internal thread, and an outer circumference of the end of the intermediate sleeve (1) facing the knob cover (2) is provided with an external thread that matches the inner wall thread of the connecting sleeve (7); A tightening ring (71) is fixedly provided on the inner edge of the opening of the end of the connecting sleeve (7) away from the intermediate sleeve (1), and one side of the tightening ring (71) abuts against the side of the retaining ring (21) away from the intermediate sleeve (1).

8. The rotary switch according to claim 6, characterized in that: A lip seal ring (8) is fixedly sleeved on the outer periphery of the knob cover (2), the outer periphery of the lip seal ring (8) abuts against the inner wall of the limiting sleeve (6), and one side of the lip seal ring (8) abuts against the side of the retaining ring (21) facing the middle sleeve (1).

9. The rotary switch according to claim 8, characterized in that: A snap ring (22) is fixedly provided on the outer periphery of the knob cover (2), and the side surface of the lip seal ring (8) away from the retaining ring (21) abuts against one side of the snap ring (22).

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