Test button, test structure and circuit breaker

Abstract

The utility model discloses a test button, a test structure and a circuit breaker. The test button comprises a pressing part and a rod part, the rod part is provided with a contraction through groove and an anti-falling boss in the radial direction, and the anti-falling boss is distributed on the peripheral wall of the rod part with the contraction through groove; the maximum width size of the anti-falling boss is reduced after the shrinkage through groove is shrunk, the maximum width size of the anti-falling boss is L1 when the shrinkage through groove is not shrunk, the maximum width size of the anti-falling boss is L2 after the shrinkage through groove is shrunk, and L1 is larger than L2; the two sides, close to the contraction through groove, of the anti-disengaging boss are each provided with an avoiding part, the size between the two avoiding parts is L3, and L3 is smaller than or equal to L2. According to the application, the abrasion between the anti-drop step of the test button and the test button hole can be relieved.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and in particular to a circuit breaker, and in particular to an operating mechanism of a circuit breaker. Background Art

[0002] Molded case circuit breakers often require a test button. When the operating mechanism is in the closed state, the user can press the test button to open the circuit breaker.

[0003] For example, CN217061815U discloses a circuit breaker, in which the test button has such an effect. In order to install the limit step under the middle cover (complete the stable assembly of the test button), and then use the limit step to clamp under the middle cover, it is necessary to open a shrink hole near the limit step. During installation, the pressure rod is inserted into the button hole, and the limit step is squeezed by the hole wall of the button hole, so that the shrink hole shrinks, causing the size of the limit step to be reduced, and finally the limit step passes over the button hole to complete the assembly.

[0004] However, the existing structure of the test button is Fig.11 It can be seen that before the shrinkage hole shrinks, the width of the limit step is basically the same at all places (all larger than the size of the button hole). As the shrinkage hole shrinks, the width of the limit step is Figure 1 The width of the upper limit step in the A direction can be reduced, while the width in the B direction will not be reduced and will remain the original width (still larger than the button hole). The B direction here refers to the two sides of the limit step close to the shrink hole. When the test button is finally installed, the part that cannot be reduced will be severely squeezed with the button hole, which is very undesirable and can easily damage the hole wall or the limit step of the button hole.

[0005] Therefore, how to design a new test button structure to alleviate the wear between the test button limit step and the button hole is a direction worthy of research. Summary of the invention

[0006] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and to provide a test button, a test structure and a circuit breaker to alleviate the degree of wear between the anti-drop step and the test button hole.

[0007] A test button comprises a pressing portion and a rod portion; a contraction groove and an anti-dropout boss are provided in the radial direction of the rod portion, and the anti-dropout boss is distributed on the peripheral wall of the rod portion with the contraction groove; the contraction groove reduces the maximum width dimension of the anti-dropout boss, the maximum width dimension of the anti-dropout boss is L1 when the contraction groove is not contracted, and the maximum width dimension of the anti-dropout boss is L2 after the contraction groove is contracted, and L1>L2; wherein, avoidance portions are provided on both sides of the anti-dropout boss close to the contraction groove, the dimension between the two avoidance portions is L3, and L3≤L2.

[0008] By adopting such a test button structure, since avoidance parts are provided on both sides of the anti-slip boss close to the shrinkage groove, the dimension between the two avoidance parts is L3, and L3≤L2 here (the maximum width dimension of the anti-slip boss after reduction). In simple terms, the width dimension of the anti-slip boss close to both sides of the shrinkage groove is always no greater than L2, and the dimension L2 can pass through the corresponding mounting holes on the upper cover. Therefore, compared with the prior art, such a structural design can greatly reduce the degree of wear between the anti-slip boss and the test button hole of the upper cover.

[0009] In some embodiments of the present application, the anti-slip boss is distributed near the center of the shrinkage groove in the length direction.

[0010] With this structural design, the anti-slip boss is arranged near the center of the shrinkage slot in the length direction. Since the deformation at the center position is relatively large, the anti-slip boss is arranged nearby so that the size change of the anti-slip boss is more obvious when the shrinkage slot shrinks.

[0011] In some embodiments of the present application, the avoidance portion is a plane.

[0012] The flat design makes it easier to shape the structure.

[0013] A test structure includes a traction rod and a test spring; wherein, it also includes the above-mentioned test button; a test protrusion is arranged on the traction rod, and the test protrusion has a test contact surface. When the test button is pressed, it contacts the test contact surface to rotate the traction rod, and the test spring is used to give a restoring force to the pressed test button; the test contact surface is an inclined surface, and when the test button is not pressed, the inclination direction of the test contact surface is inclined toward the direction where the test button is located, and the test contact surface is arranged at an acute angle with the pressing direction of the test button.

[0014] By adopting this structure, the test button and the test contact surface are connected to each other, so that the contact between the two can be more stable.

[0015] A circuit breaker comprises an upper cover; wherein, it also comprises the above-mentioned test button or the above-mentioned test structure; the upper cover is provided with a test installation groove, and the test button is arranged in the test installation groove; the bottom of the test installation groove is provided with a test button hole, and the diameter of the test button hole is D1, L1>D1≥L2.

[0016] By adopting this structure, the squeezing force between the anti-drop boss and the test button hole can be greatly reduced, and at the same time, the size L1 can be used to prevent the test button from falling off the upper cover.

[0017] In some embodiments of the present application, a top cover is further included, wherein a top cover boss matching the size of the top cover is arranged on the top wall of the top cover, and a top cover cover is arranged on the top cover boss and is detachably fixed to the top cover; a test installation groove is opened on the top cover boss, and a test through hole is opened on the top cover, and the pressing portion of the test button is exposed through the test through hole.

[0018] The design of the top cover boss will be more conducive to the installation of the top cover. The test installation groove is opened on the top cover boss, and the test button can be pressed through the test through hole on the top cover.

[0019] In some embodiments of the present application, the top cover boss has a test mounting boss, and the notch of the test mounting groove is located on the test mounting boss; or / and, a first accessory mounting groove is opened on the top cover boss, and the first accessory mounting groove is used to install auxiliary accessories or alarm accessories; or / and, a second accessory mounting groove is opened on the top cover boss, and the second accessory mounting groove is used to install a shunt release or a flux release or an undervoltage release or an overvoltage release or an over-undervoltage release.

[0020] With this structure, the design of the test mounting boss can ensure that the test mounting slot has sufficient size, that is, the test button has sufficient movement stroke. The design of the first accessory mounting slot can facilitate the installation of auxiliary accessories or alarm accessories, and the design of the second accessory mounting slot can facilitate the installation of various release accessories.

[0021] In some embodiments of the present application, external accessory mounting grooves are provided on both side surfaces of the upper cover, and the notches of the external accessory mounting grooves are located on the top wall of the upper cover; or / and, limiting grooves are provided on both side surfaces of the upper cover, and the top cover is provided with limiting protrusions extending downward, and the limiting protrusions are consistent with the shape of the limiting grooves.

[0022] With this structure, the design of the external accessory installation slot will facilitate the installation of various external accessories, while the design of the limiting groove and the limiting protrusion will facilitate the positioning and assembly between the top cover and the upper cover.

[0023] In some embodiments of the present application, the first pre-installation hole and / or the second pre-installation hole are formed around the top wall of the upper cover.

[0024] With this structure, the provision of the first pre-installation hole can facilitate the user to subsequently install the terminal shield through self-tapping screws, while the provision of the second pre-installation hole can facilitate the user to install an external electric operating mechanism or an external manual operating mechanism through self-tapping screws.

[0025] In some embodiments of the present application, a base is further included, and the upper cover is fixed on the base; the upper cover is provided with a first plug-in portion, a second plug-in portion, or a third plug-in portion that is integrally formed with the upper cover, and the first plug-in portion, the second plug-in portion, or the third plug-in portion extends toward the inside of the base.

[0026] In the prior art, the first inserting piece, the second inserting piece, and the third inserting piece are all independent sheet structures from the upper cover and the base. Using this structure to make them into an integral structure with the upper cover will help reduce the installation process and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic structural diagram of a circuit breaker in Embodiment 1 of the present application is shown;

[0029] Figure 2 A schematic diagram of the structure of the base in Example 1 of the present application is shown;

[0030] Figure 3 A schematic diagram of the structure of the upper cover in Embodiment 1 of the present application is shown;

[0031] Figure 4 A schematic diagram showing the structure of the upper cover from another perspective in Embodiment 1 of the present application is shown;

[0032] Figure 5 The structure diagram of the test button in Example 1 of the present application is shown;

[0033] Figure 6 A cross-sectional view of the shrinkage hole of the test button in Example 1 of the present application when the shrinkage hole is not shrunk is shown;

[0034] Figure 7 A cross-sectional view of the shrinkage hole of the test button in Example 1 of the present application when the shrinkage hole shrinks is shown;

[0035] Figure 8 A partial schematic diagram of the upper cover in Embodiment 1 of the present application is shown;

[0036] Fig. 9 A partial schematic diagram of the test button and the upper cover after being assembled in Example 1 of the present application is shown;

[0037] Fig.10 A schematic diagram showing the positions of the test button and the traction rod in Example 1 of the present application (when the test button is not pressed);

[0038] Fig.11 The schematic diagram of the structure of the test button in the prior art is shown. Implementation

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "primary" and "secondary" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, when a main feature is “above” or “below” a second feature, it can mean that the main feature and the second feature are in direct contact, or the main feature and the second feature are in indirect contact through an intermediate medium. Moreover, when a main feature is “above”, “above” or “above” a second feature, it can mean that the main feature is directly above or obliquely above the second feature, or simply means that the main feature is higher in level than the second feature. When a main feature is “below”, “below” or “below” a second feature, it can mean that the main feature is directly below or obliquely below the second feature, or simply means that the main feature is lower in level than the second feature. Example

[0044] like Figure 1-Figure 10 As shown, an embodiment of the present application provides a circuit breaker, which is a molded case circuit breaker. Of course, the molded case circuit breaker here includes a thermal-magnetic molded case circuit breaker, an electronic molded case circuit breaker, a reclosing circuit breaker, a measuring switch, a fusion switch, etc.

[0045] The circuit breaker includes a top cover 100, a base 101, an upper cover 102, an operating mechanism and a test structure.

[0046] The base 101 is provided with contact system slots inside. In this embodiment, the number of contact system slots is three, and the three contact system slots are arranged side by side. The direction of the side-by-side arrangement is the width direction of the circuit breaker. The shapes of the three contact system slots are basically the same. Taking one of the contact system slots as an example, it is a first terminal slot, a static contact slot, a shaft slot, a release slot and a second terminal slot in sequence along the length direction of the circuit breaker. The first terminal slot here is used to install the first terminal, the static contact slot is used to install the static contact and the arc extinguishing chamber, the shaft slot is used to install the shaft and the operating mechanism, the release slot is used to install the thermal magnetic release (such as the electronic molded case circuit breaker is used to install the backup protector), and the second terminal slot is used to install the second terminal.

[0047] The upper cover 102 includes a top wall 1022 and a second side wall connected to the top wall 1022. The number of the second side walls here is the same as the number of the first side walls, and the second side walls are arranged to fit the first side walls. The upper cover 102 is provided with a first plug-in portion 1023 extending toward the base 101, and the first plug-in portion 1023 is inserted between the first terminal slot and the static contact slot. The upper cover 102 is provided with a second plug-in portion 1025 extending toward the base 101, and the second plug-in portion 1025 is inserted into the contact system slot and is located on one side of the second terminal slot. The upper cover 102 is provided with a third plug-in portion 1026 extending toward the base 101, and the third plug-in portion is inserted between two adjacent contact system slots. A first pre-installation hole 1028 and a second pre-installation hole 1029 are provided around the top wall 1022 of the upper cover 102, that is, at the four corners. The first pre-installation hole 1028 is used to install the terminal shield, and the second pre-installation hole 1029 is used to install an external electric operating mechanism or an external manual operating mechanism. The installation of these components is fixed by self-tapping screws and pre-installation holes.

[0048] External accessory mounting grooves 102f1 are provided on both side surfaces of the upper cover 102 . The notches of the external accessory mounting grooves 102f1 are located on the top wall 1022 of the upper cover 102 . External accessories can be mounted on both side surfaces of the upper cover 102 through the mounting grooves.

[0049] A top cover boss 102f0 is provided on the top wall 1022 of the upper cover 102. The size of the top cover 100 matches the boss of the top cover 100. The top cover 100 is set on the top cover boss 102f0 and is fastened with bolts between the top cover boss 102f0. In addition to bolt fastening, other detachable fixing methods can also be used here, for example, the top cover 100 is hinged to the top cover boss 102f0 at one end, and the other end is fastened with a buckle or bolts. Limiting grooves 102f2 are provided on the two side surfaces of the upper cover 102. The top cover 100 is provided with a limiting protrusion 100a extending downward. The limiting protrusion 100a matches the shape of the limiting groove 102f2. The positioning assembly between the top cover 100 and the upper cover 102 can be achieved through the cooperation of the two.

[0050] A first accessory mounting groove 102f3 and a second accessory mounting groove 102f4 are provided on the top cover boss 102f0. The first accessory mounting groove 102f3 is used to install auxiliary accessories or alarm accessories; the second accessory mounting groove 102f4 is used to install a releaser, such as a shunt releaser, a flux releaser, an undervoltage releaser, an overvoltage releaser, an over- and undervoltage releaser, etc.

[0051] A test installation boss 102f5 is provided on the top cover boss 102f0, the notch of the test installation slot 102b is located on the test installation boss 102f5, and a test through hole 100b is provided at a corresponding position of the top cover 100. Such a structure allows the test button 201 to be exposed through the test through hole 100b for user operation. The design of the test installation boss 102f5 allows the test installation slot 102b to have enough space for the test button 201 to move.

[0052] The test structure includes a traction rod 1059 , a test button 201 , and a test spring 202 .

[0053] The traction rod 1059 is a part of the operating mechanism, and the traction rod 1059 is arranged between the upper cover 102 and the base 101 .

[0054] The test button 201 includes a pressing portion 2011 and a rod portion 2012. The test spring 202 is sleeved on the rod portion 2012, and the two ends of the test spring 202 are respectively abutted between the pressing portion 2011 and the bottom of the test installation groove 102b. An anti-slip boss 2012a is provided in the radial direction of the rod portion 2012, and the anti-slip boss 2012a can abut on the surface of the upper cover 102 facing the base 101, thereby preventing the test button 201 from being detached from the test installation groove 102b. In order to facilitate the installation of the test button 201, a contraction groove 2012b is opened in the radial direction of the rod 2012, and the anti-slip boss 2012a is also arranged on the part of the rod 2012 having the contraction groove 2012b. At the same time, avoidance portions 2012c are arranged on both sides of the anti-slip boss 2012a close to the contraction groove 2012b. Here, the avoidance portion 2012c is a plane, and the size between the two avoidance portions 2012c is L3. Here, the diameter of the test button hole 102b1 is D1, the maximum width dimension of the anti-dropout boss 2012a when the shrinkage slot 2012b is not shrunk is L1, and the maximum width dimension of the anti-dropout boss 2012a after the shrinkage slot 2012b is shrunk is L2, and the relationship L1>D1≥L2≥L3 is satisfied here, that is, when installing, the rod 2012 is pressed into the test button hole 102b1, and as the anti-dropout boss 2012a contacts the test button hole 102b1, The hole wall, the test button hole 102b1 will squeeze the contraction groove 2012b so that the width of the anti-dropping boss 2012a is reduced. As the width of the anti-dropping boss 2012a is reduced to match D1 (that is, L2), the anti-dropping boss 2012a completely passes through the test button hole 102b1, and then the contraction groove 2012b is restored to its original state so that the size of the anti-dropping boss 2012a is restored to L1, preventing the test button 201 from falling off from the test button hole 102b1. Compared with the prior art, here, due to the design of the avoidance portion 2012c, the distance between the anti-dropping boss 2012a on both sides of the contraction groove 2012b is L3 (L3≤L2≤D1). Compared with the prior art, such a structural design can greatly reduce the wear between the anti-dropping boss 2012a and the test button hole 102b1.

[0055] A test protrusion 1059c is provided at the position of the traction rod 1059 corresponding to the rod portion 2012. Specifically, when the test button 201 is not pressed, the test contact surface 1059d of the test protrusion 1059c is inclined, and the inclination direction is inclined toward the direction where the test button 201 is located, and the angle formed by the test contact surface 1059d and the pressing direction of the test button 201 is an acute angle α. When the user presses the test button 201, the test button 201 can drive the traction rod 1059 to rotate. At this time, if the operating mechanism is originally in the closing position, the rotation of the traction rod 1059 will cause the operating mechanism to perform the opening operation.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A test button, comprising a pressing portion and a rod; a contraction slot and an anti-dropout boss are provided in the radial direction of the rod, and the anti-dropout boss is distributed on the peripheral wall of the rod with the contraction slot; the contraction slot shrinks so that the maximum width of the anti-dropout boss is reduced, the maximum width of the anti-dropout boss is L1 when the contraction slot is not contracted, and the maximum width of the anti-dropout boss is L2 after the contraction slot is contracted, L1>L2; characterized in that: Both sides of the anti-slip boss close to the shrinkage groove are provided with avoidance parts, and the dimension between the two avoidance parts is L3, wherein L3≤L2.

2. A test button according to claim 1, characterized in that: The anti-slip boss is distributed near the center of the shrinkage through groove in the length direction.

3. A test button according to claim 1, characterized in that: The avoidance portion is a plane.

4. A test structure, comprising a traction rod and a test spring; characterized in that: It also includes a test button as described in any one of claims 1 to 3; a test protrusion is arranged on the traction rod, the test protrusion has a test contact surface, and when the test button is pressed, it contacts the test contact surface to rotate the traction rod, and the test spring is used to provide a restoring force to the pressed test button; the test contact surface is an inclined surface, and when the test button is not pressed, the inclination direction of the test contact surface is inclined toward the direction where the test button is located, and the test contact surface is arranged at an acute angle to the pressing direction of the test button.

5. A circuit breaker, comprising an upper cover; characterized in that: It includes a test button as described in any one of claims 1 to 3 or a test structure as described in claim 4; a test installation groove is provided on the upper cover, and the test button is arranged in the test installation groove; a test button hole is provided at the bottom of the test installation groove, and the diameter of the test button hole is D1, L1>D1≥L2.

6. A circuit breaker according to claim 5, characterized in that: It also includes a top cover, a top cover boss that matches the size of the top cover is arranged on the top wall of the top cover, and a top cover cover is arranged on the top cover boss and is detachably fixed to the top cover; a test installation groove is opened on the top cover boss, and a test through hole is opened on the top cover, and the pressing part of the test button is exposed through the test through hole.

7. A circuit breaker according to claim 6, characterized in that: The top cover boss is provided with a test mounting boss, and the notch of the test mounting groove is located on the test mounting boss; or / and, a first accessory mounting groove is provided on the top cover boss, and the first accessory mounting groove is used to install an auxiliary accessory or an alarm accessory; or / and, a second accessory mounting groove is provided on the top cover boss, and the second accessory mounting groove is used to install a shunt release or a flux release or an undervoltage release or an overvoltage release or an over-undervoltage release.

8. A circuit breaker according to claim 6, characterized in that: External accessory mounting grooves are provided on both side surfaces of the upper cover, and the notches of the external accessory mounting grooves are located on the top wall of the upper cover; or / and, limiting grooves are provided on both side surfaces of the upper cover, and the top cover is provided with limiting protrusions extending downward, and the limiting protrusions are consistent in shape with the limiting grooves.

9. A circuit breaker according to claim 5, characterized in that: The top wall of the upper cover is provided with first pre-installation holes and / or second pre-installation holes around its periphery.

10. A circuit breaker according to claim 5, characterized in that: It also includes a base, and the upper cover is fixed on the base; the upper cover is provided with a first plug-in portion, a second plug-in portion, or a third plug-in portion integrally formed with the upper cover, and the first plug-in portion, the second plug-in portion, or the third plug-in portion extends toward the inside of the base.

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