Locking structure of switch device

Abstract

The utility model discloses a locking structure of a switching device. The locking structure comprises a locking piece and a locking piece, a screw hole is formed in the center of the locking piece, a protruding portion used for increasing the number of threads is arranged on one end face, corresponding to the screw hole, of the locking piece in an axial extending mode, the outer periphery of the protruding portion is connected with a step portion composed of at least one step face, the length of the protruding portion is 1 / 4-1 / 2 of the overall length of the locking piece, and the screw hole can be sleeved on a combination portion of a switch element. The combination part is provided with an external thread which is screwed with the screw hole, so that the switch element can be clamped and fixed in a positioning hole on a panel in cooperation with the locking part, and the switch element can be matched with the design that the step part abuts against the panel through the step surfaces with different outer diameters, so that the switch element can be fixed in various application occasions with different panel thicknesses and different positioning hole diameters. Therefore, the required anti-torsion force can be kept between the locking piece and the switch element, and the switch element is effectively prevented from loosening and falling off.

Description

Technical Field

[0001] This utility model relates to a locking structure for a switch device, and more particularly to a locking structure that can accommodate different panel thicknesses and different positioning hole diameters, and can maintain sufficient thread depth with the switch element. Background Technology

[0002] Traditional locking mechanisms for fixing switching elements to the panel of a distribution box mostly have a ring-shaped locking member with a screw hole; the switching element has a connecting part with external threads; during assembly, the connecting part of the switching element is inserted from the outer side of the panel into a preset positioning hole, and the locking member is screwed from the inner side of the panel onto the external threads of the connecting part; the locking member, in conjunction with the switching element, clamps the panel to form a positioning mechanism.

[0003] However, in the above structure, the external thread on the joint and the screw hole of the locking member each have a fixed number of threads. If the thickness of the panel increases, the locking member will be stopped at the position near the outer end of the joint. As a result, the number of threads that engage between the external thread of the switching element and the screw hole of the locking member will decrease. In this way, not only will the switching element have low torsional resistance due to insufficient number of threads, but it may even cause the switching element to become loose or fall off the panel.

[0004] Furthermore, since the switch element and the locking member abut against the outer and inner surfaces of the panel respectively on a plane, when the diameter of the positioning hole on the panel is too large than the outer diameter of the joint of the switch element, the switch element is prone to loosening or displacement in the positioning hole due to insufficient clamping contact area and lack of other auxiliary positioning mechanisms. Therefore, traditional locking members are mostly only suitable for positioning the switch element with a single fixed hole diameter (slightly larger than the outer diameter of the joint), which greatly limits their applicability.

[0005] Therefore, the existing locking mechanism of the switching device has the above-mentioned shortcomings in practical applications, and there is room for improvement. Utility Model Content

[0006] The main objective of this invention is to provide a locking structure for a switching device, comprising: a locking member; a screw hole in the center of the locking member, and a protrusion extending axially from one end of the locking member corresponding to the screw hole to increase the number of thread turns; a stepped portion consisting of at least one stepped surface connected to the outer periphery of the protrusion; the length of the protrusion being between 1 / 4 and 1 / 2 of the overall length of the locking member; the screw hole being able to fit into a protruding connecting portion on a switching element; the connecting portion having an external thread that engages with the screw hole, allowing the switching element to be clamped and fixed in a positioning hole on a panel by the locking member; when the thickness of the panel increases, the protrusion can be inserted into the positioning hole during assembly, using the protrusion to increase the number of thread turns between the screw hole of the locking member and the external thread of the switching element, thus achieving applicability to different panel thicknesses and ensuring that the locking member and the switching element maintain the required anti-torsional force, effectively preventing the switching element from loosening, falling off, or other defects.

[0007] Another objective of this utility model is to provide a locking structure for a switching device, wherein the stepped portion can be a multi-step structure with different outer diameters arranged in a stepped manner. The different steps can be fitted into positioning holes of different diameters to form positioning respectively, so that the locking member can be applied to positioning holes of different diameters, thereby reducing development and production costs and improving overall economic efficiency.

[0008] Another objective of this invention is to provide a locking structure for a switch device, wherein the design of increasing the number of threads by having the protrusion extend into the positioning hole can further shorten the length of the locking member exposed outside the panel under the same torque resistance (threading tightness) requirements, which is conducive to the miniaturization design of related products.

[0009] To achieve the above objectives and effects, the technical means adopted by this utility model include: a locking structure for a switch device, comprising: a locking member; the locking member has a screw hole in the center, and a protrusion extends axially from one end face of the locking member corresponding to the screw hole, and a step composed of at least one stepped surface is connected to the outer periphery of the protrusion, and the length of the protrusion is between 1 / 4 and 1 / 2 of the overall length of the locking member, so as to increase the number of threads that can be provided in the screw hole.

[0010] According to the above structure, the protrusion has an end face, and the step has a step face that is furthest from the end face.

[0011] According to the above structure, the protrusion has an end face, and the step has a stepped surface arranged in a stepped manner with the farthest step and the nearest step at unequal distances from the end face.

[0012] According to the above structure, the locking member has an end face on the side away from the protrusion, and a ring flange is protruding around the periphery of the end face.

[0013] According to the above structure, the locking member has a plurality of first recesses spaced apart at one end periphery having the protrusion; and has a plurality of second recesses spaced apart from each of the first recesses at one end periphery away from the protrusion.

[0014] According to the above structure, the locking member can be fitted onto the protruding joint of a switching element through the screw hole, and the outer periphery of the joint is provided with an external thread that can be screwed into the screw hole.

[0015] To provide a more concrete understanding of the above-mentioned objectives, effects, and features of this utility model, the following description is provided in reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is an exploded perspective view of the first embodiment of this utility model.

[0017] Figure 2 This is a schematic diagram of the first embodiment of the present utility model; it shows the state in which the locking member and the switching element are combined and the ring flange abuts against the panel.

[0018] Figure 3 This is a schematic diagram of the second embodiment of the first embodiment of the present utility model; it shows that after the locking member and the switching element are combined, the protrusion extends into the positioning hole of the panel and the step abuts against the panel.

[0019] Figure 4 This is a schematic diagram of the second embodiment of the present invention; it shows that after the locking member and the switching element are combined, the protrusion extends into the positioning hole of the panel and the step abuts against the panel.

[0020] 1,10: Locking connector

[0021] 11: Screw hole

[0022] 12: convex part

[0023] 120: First end face

[0024] 14: Second end face

[0025] 13: The farthest step

[0026] 131: First concave notch

[0027] 140: Annular flange

[0028] 141: Second concave notch

[0029] 15: The nearest step surface

[0030] 19: Steps

[0031] 2,2a,2b: Panel

[0032] 21: Outer surface

[0033] 22: Inner surface

[0034] 23, 23a, 23b: Positioning holes

[0035] 3: Switching elements

[0036] 31: Clamping surface

[0037] 32: Joint

[0038] 321: External thread Detailed Implementation

[0039] Please refer to Figures 1 to 3 As shown, the structure of the first embodiment of this utility model includes: an annular locking member 1; a screw hole 11 is provided in the center of the locking member 1, and a protrusion 12 extends axially from one end face of the locking member 1 corresponding to the screw hole 11. The extension of the protrusion 12 can increase the number of threads that can be provided in the screw hole 11. A step portion 19 composed of at least one stepped surface can be connected to the outer periphery of the protrusion 12. The length from the first end face 120 of the protrusion 12 to the step surface 13 that is farthest from the step portion 19 is less than or equal to (≦) 1 / 2 of the overall length of the locking member 1, and the length from the first end face 120 of the protrusion 12 to the step surface 15 that is closest to the step portion 19 (e.g., Figure 4 The length between (as shown) is greater than or equal to (≧) 1 / 4 of the overall length of the locking member 1, such that the overall length of the protrusion 12 is between 1 / 4 and 1 / 2 of the overall length of the locking member 1; and a ring flange 140 is provided around the second end face 14 of the locking member 1 away from the protrusion 12.

[0040] exist Figures 1 to 3 In the embodiment shown, the step portion 19 has a single farthest step surface 13; and the locking member 1 has a plurality of first recessed notches 131 spaced apart at the periphery of the farthest step surface 13; and at the end away from the protrusion 12 and at the periphery of the annular flange 140, a plurality of second recessed notches 141 spaced apart from each of the first recessed notches 131 are provided, and each of the first recessed notches 131 and the second recessed notches 141 can be inserted into for operation by a preset operating tool.

[0041] In practical applications, the locking member 1 can be assembled with a switching element 3 and position the switching element 3 on a panel 2 (or a panel 2a with a thickness greater than that of the panel 2); wherein one end of the switching element 3 is provided with a protruding connecting part 32, and an external thread 321 is provided on the outer periphery of the connecting part 32, and the part of the switching element 3 that connects to the connecting part 32 is provided with a clamping surface 31; and the panel 2 (or panel 2a) is provided with a positioning hole 23 (or positioning hole 23a), and an outer surface 21 and an inner surface 22 are formed on the two side surfaces of the panel 2 (or panel 2a) respectively.

[0042] When the switching element 3 extends into the positioning hole 23 of the thinner panel 2 with its connecting portion 32, and contacts the outer surface 21 of the panel 2 with its clamping surface 31, the locking member 1, with one end having the annular flange 140 facing the inner surface 22 of the panel 2, is screwed into the external thread 321 of the connecting portion 32 with the threaded hole 11. The annular flange 140 of the locking member 1, in conjunction with the clamping surface 31 of the switching element 3, clamps the panel 2 (e.g., ...). Figure 2 As shown), the switch element 3 is securely positioned on the thinner panel 2; during the assembly process, the operating tool is inserted into the exposed second recess 141 to rotate the locking member 1.

[0043] In this combination, since the panel 2 is relatively thin, when the locking member 1 is tightly clamped to the inner surface 22 of the panel 2, the locking member 1 is located closer to the bottom end of the joint 32. Therefore, even if the locking member 1 abuts against the inner surface 22 of the panel 2 with the annular flange 140, the screw hole 11 can still be fully screwed onto the external thread 321, so that the switch element 3 and the locking member 1 can maintain sufficient anti-torsional force to fix them to the panel 2.

[0044] When the switching element 3 extends into the positioning hole 23a of the thicker panel 2a with its connecting portion 32, and its clamping surface 31 contacts the outer surface 21 of the panel 2a, the locking member 1, with one end having the protrusion 12 facing the inner surface 22 of the panel 2a, is screwed into the external thread 321 of the connecting portion 32 with the screw hole 11, so that the protrusion 12 extends into the positioning hole 23a. The outer periphery of the protrusion 12 abuts against the inner periphery of the positioning hole 23a, and the farthest stepped surface 13 of the locking member 1 and the clamping surface 31 of the switching element 3 clamp the panel 2a (e.g., Figure 3 The two sides of the panel 2a are arranged to securely attach the switch element 3 to the thicker panel 2a. During the assembly process, the operating tool is inserted into the exposed first recess 131 to rotate the locking member 1.

[0045] In this combination, since the panel 2 is thicker, when the locking member 1 is clamped on the inner surface 22 of the panel 2, although the position of the locking member 1 will be farther away from the bottom end of the joint 32, the design of the protrusion 12 extending into the positioning hole 23a can still make the screw hole 11 fully screwed into the external thread 321, so as to ensure that the switch element 3 and the locking member 1 maintain sufficient anti-torsional force to fix them on the panel 2.

[0046] Therefore, the locking member 1 structure of the first embodiment of the present invention can be widely applied to panels 2 (or panels 2a) of different thicknesses, and can be fully screwed into the switching element 3 to form a stable positioning.

[0047] Please refer to Figure 4 As shown, the structure of the second embodiment of this utility model includes: a locking member 10; the locking member 10 has the same screw hole 11, protrusion 12, and annular flange 140 as the first embodiment described above; the difference is that the locking member 10 has a stepped portion 19 connected to the outer periphery of the protrusion 12; in Figure 4 In the embodiment shown, the step portion 19 is composed of a series of stepped surfaces arranged in a stepped manner, including the farthest step surface 13 and the nearest step surface 15 with different outer diameters (and / or lengths). However, in actual applications, the number of stepped surfaces of the step portion 19 connected by the protrusion 12 can vary according to different needs, and is not limited here.

[0048] When the locking member 10, the switching element 3, and a panel 2b with a thickness greater than that of the aforementioned panel 2a are combined, the connecting portion 32 of the switching element 3 can be inserted into the pre-set positioning hole 23b on the panel 2b, with the clamping surface 31 contacting the outer surface 21 of the panel 2b, and the locking member 10 with one end having the protrusion 12 facing the inner surface 22 of the panel 2b, and then the screw hole 11 is screwed into the external thread 321 of the connecting portion 32, so that the protrusion 12 and the nearest stepped surface 15 extend into the positioning hole 23b, and the outer periphery of the nearest stepped surface 15 abuts against the inner periphery of the positioning hole 23a, and the farthest stepped surface 13 of the locking member 10 and the clamping surface 31 of the switching element 3 clamp the two sides of the panel 2b, so that the switching element 3 can be stably connected and positioned on the panel 2b.

[0049] In practical applications, if the positioning hole 23b of panel 2b has a smaller diameter, the circumference of the protrusion 12 can have a smaller outer diameter (e.g., Figure 4 The protrusion 12 extends into the positioning hole 23b, utilizing the smaller first-order outer periphery (such as... Figure 4The outer periphery of the protrusion 12 (i.e., the inner periphery of the nearest stepped surface 15) abuts against the inner periphery of the positioning hole 23b, and the nearest stepped surface 15 of the locking member 10 and the clamping surface 31 of the switching element 3 clamp the panel 2b, so that the switching element 3 can be used in the positioning hole 23b with a smaller diameter and is firmly engaged and positioned on the panel 2b.

[0050] Therefore, the locking member 10 structure of the second embodiment of the present invention can be widely used in positioning holes 23b with different diameters, and can be fully screwed into the switching element 3 to form a stable positioning, thus having a wide range of applications.

[0051] In summary, the locking structure of the switch device of this utility model can indeed achieve the effect of maintaining sufficient thread depth with the switch element, regardless of the panel thickness or the diameter of the positioning hole. The above description is only a description of the preferred embodiment of this utility model. Any variations, modifications, alterations, or equivalent substitutions derived from the technical means and scope of this utility model should also fall within the protection scope of this utility model.

Claims

1. A locking structure for a switching device, characterized in that: include: A locking member (1, 10); the locking member (1, 10) has a screw hole (11) in the center, and a protrusion (12) is provided axially extending from one end face of the locking member (1, 10) forming the screw hole (11). A step (19) composed of at least one stepped surface is connected to the outer periphery of the protrusion (12), and the length of the protrusion (12) is between 1 / 4 and 1 / 2 of the overall length of the locking member (1, 10) to increase the number of threads that can be provided in the screw hole (11).

2. The locking structure of the switching device as described in claim 1, characterized in that: The protrusion (12) has a first end face (120), and the step (19) has a farthest step face (13) that is furthest from the first end face (120).

3. The locking structure of the switching device as described in claim 1, characterized in that: The protrusion (12) has a first end face (120), and the step (19) has a stepped surface (13) that is farthest from the first end face (120) and a step surface (15) that is unequally distanced from the first end face (120).

4. The locking structure of the switching device as described in claim 1, 2, or 3, characterized in that: The locking member (1, 10) forms a second end face (14) on the side away from the protrusion (12), and a ring flange (140) is provided around the periphery of the second end face (14).

5. The locking structure of the switching device as described in claim 1, 2, or 3, characterized in that: The locking member (1, 10) has a plurality of first recesses (131) spaced apart at one end periphery of the protrusion (12); and has a plurality of second recesses (141) spaced apart from each of the first recesses (131) at one end periphery away from the protrusion (12).

6. The locking structure of the switching device as described in claim 4, characterized in that: The locking member (1, 10) has a plurality of first recesses (131) spaced apart at one end periphery of the protrusion (12); and has a plurality of second recesses (141) spaced apart from each of the first recesses (131) at one end periphery away from the protrusion (12).

7. The locking structure of the switching device as described in claim 1, 2 or 3, wherein the locking member (1, 10) can be fitted onto the protruding joint (32) of a switching element (3) through the screw hole (11), and the outer periphery of the joint (32) is provided with an external thread (321) that can be screwed into the screw hole (11).

8. The locking structure of the switching device as described in claim 4, characterized in that: The locking member (1, 10) can be fitted onto the protruding joint (32) of a switch element (3) through the screw hole (11), and the outer periphery of the joint (32) is provided with an external thread (321) that can be screwed into the screw hole (11).

9. The locking structure of the switching device as described in claim 5, characterized in that: The locking member (1, 10) can be fitted onto the protruding joint (32) of a switch element (3) through the screw hole (11), and the outer periphery of the joint (32) is provided with an external thread (321) that can be screwed into the screw hole (11).

10. The locking structure of the switching device as claimed in claim 6, wherein the locking member (1, 10) can be fitted onto the protruding joint portion (32) of a switching element (3) through the screw hole (11), and the outer peripheral side of the joint portion (32) is provided with an external thread (321) that can be screwed into the screw hole (11).

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