Drawer-type circuit breakers and their drawers and safety baffle devices

Abstract

Embodiments of this disclosure provide a drawer-type circuit breaker and its drawer and safety baffle device. The safety baffle device includes: a base including a support surface and a mounting groove; a pair of baffles supported by the support surface, including two baffles stacked together and slidable relative to each other in a predetermined direction; a pressing member elastically and telescopically disposed in the mounting groove and used to drive the two baffles to slide relative to each other; and a limiting member including: a connecting portion connected to the support surface and spaced a predetermined distance from the mounting groove in a direction perpendicular to the predetermined direction; and a limiting portion extending from the connecting portion to form a space between itself and the support surface to accommodate the two baffles.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of electrical equipment, and more specifically, to a drawer-type circuit breaker and its drawer and safety baffle device. Background Technology

[0002] Drawer-type circuit breakers, also known as drawer-type ACBs (Air Circuit Breakers), are common switching devices in low-voltage power distribution systems. A drawer-type circuit breaker consists of a drawer frame and a circuit breaker body. The circuit breaker body is inserted into or removed from the drawer frame via guide rails mounted on it, allowing the incoming and outgoing copper busbars of the circuit breaker body to connect or disconnect with the corresponding contacts located in the drawer frame. Utility Model Content

[0003] In a first aspect of this disclosure, a safety baffle device is provided for a drawer-type circuit breaker, comprising: a base for mounting contacts and including a support surface and a mounting groove; a pair of baffles supported by the support surface, including two baffles stacked together and capable of sliding relative to each other in a predetermined direction; a pressing member resiliently and telescopically disposed in the mounting groove and used to drive the two baffles to slide relative to each other; and a limiting member comprising: a connecting portion connected to the support surface and spaced a predetermined distance from the mounting groove in a direction perpendicular to the predetermined direction; and a limiting portion extending from the connecting portion to form a space between itself and the support surface for accommodating the two baffles.

[0004] In some embodiments, the limiting member is L-shaped or T-shaped, and / or the limiting member is arranged close to the mounting groove.

[0005] In some embodiments, each of the two baffles is provided with a first sliding hole, and the connecting part slides in cooperation with the first sliding hole on the two baffles.

[0006] In some embodiments, each of the two baffles includes a clearance hole located at at least one end of the first sliding hole, the size of which is larger than that of the limiting portion.

[0007] In some embodiments, each of the two baffles is provided with a second sliding hole, and each of the two baffles is provided with a guide member, the guide member on each baffle slidingly engaging with the second sliding hole on the other baffle, and / or each of the two baffles is provided with an elastic hook, the elastic hook on each baffle engaging with the edge of the second sliding hole on the other baffle.

[0008] In some embodiments, each of the two baffles is provided with a slot, and the baffle pair is switchable between a first state and a second state under the drive of a pressing member, wherein in the first state, the slots on the two baffles are aligned, and in the second state, the slots on the two baffles are staggered from each other, and wherein at least the baffle adjacent to the support surface is provided with a limiting protrusion, which abuts against a limiting step on the base when the baffle pair switches from the second state to the first state.

[0009] In some embodiments, the two baffles have the same structure and / or the preset direction is vertical.

[0010] In some embodiments, the safety barrier device includes at least two pairs of barriers arranged adjacent to each other in a direction perpendicular to a preset direction.

[0011] In some embodiments, the extension and retraction direction of the pressing member is perpendicular to a preset direction. The pressing member includes: a main body, on one side of which two guide rails are provided, each of the two guide rails including a first straight segment, a second straight segment, and an oblique segment located between the first and second straight segments, and the distance between the two second straight segments of the two guide rails is less than the distance between the two first straight segments; and a button, located at one end of the main body and adjacent to the second straight segments of the two guide rails, the button being provided with a second indicator mark indicating the position between the two second straight segments of the two guide rails; and each of the two baffles including a mating edge opposite to the two guide rails, each mating edge having a groove and a protrusion adjacent to the groove, wherein the groove slides in cooperation with the corresponding guide rail of the two guide rails, the protrusion is located between the two guide rails, and a first indicator mark is provided on the baffle at least away from the support surface, the first indicator mark indicating the position of the protrusion on the same baffle as the first indicator mark.

[0012] In a second aspect of this disclosure, a drawer is provided, including a safety baffle device according to a first aspect of this disclosure.

[0013] In a third aspect of this disclosure, a drawer-type circuit breaker is provided, including a drawer according to a second aspect of this disclosure.

[0014] In the embodiments according to this disclosure, the connecting portion of the limiting member is spaced a predetermined distance from the mounting groove in a direction perpendicular to the preset direction. The limiting portion of the limiting member applies pressure to the two baffles, which can specifically improve the phenomenon that the two baffles do not slide smoothly when they slide under the drive of the pressing member due to the component force away from the support surface, thereby ensuring the smooth sliding of the two baffles.

[0015] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0016] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0017] Figure 1 A perspective view of a safety barrier device according to some embodiments of the present disclosure is shown, wherein the barrier pair is in a first state;

[0018] Figure 2 It shows Figure 1 Another perspective view of the safety barrier device shown, wherein the barrier pair is in a second state;

[0019] Figure 3 It shows Figure 2 Enlarged diagram of point A in the diagram;

[0020] Figure 4 It shows Figure 1 An exploded view of the safety baffle device shown.

[0021] Figure 5 It shows Figure 4 A three-dimensional schematic diagram of the pressing component from another perspective;

[0022] Figure 6 It shows Figure 4 An exploded view of the two baffles from another perspective;

[0023] Figure 7 A perspective view of a safety barrier device according to some other embodiments of the present disclosure is shown, wherein the barrier pair is in a first state;

[0024] Figure 8 It shows Figure 7 Another perspective view of the safety barrier device shown, wherein the barrier pair is in a second state;

[0025] Figure 9 It shows Figure 7 An exploded view of the base and pressing element of the safety baffle device shown;

[0026] Figure 10 It shows Figure 7 An exploded view of the baffle pair in the safety baffle device shown; and

[0027] Figure 11 It shows Figure 7 A cross-sectional view of the second sliding hole. Detailed Implementation

[0028] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0029] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.

[0030] As described above, the drawer-type circuit breaker includes a drawer frame and a circuit breaker body. The circuit breaker body is inserted into or removed from the drawer frame via guide rails mounted on the drawer frame, so as to connect or disconnect the incoming copper busbars and outgoing copper busbars of the circuit breaker body with the corresponding contacts provided in the drawer frame.

[0031] A drawer typically includes a bottom wall, left side wall, right side wall, top wall, and base. The bottom, left, right, and top walls define a front opening and a rear opening. The circuit breaker body can be inserted into or removed from the drawer through the front opening. The base closes the rear opening, and the contacts (e.g., clamp-type contacts, or simply clamps) are mounted on the base. The number of contacts is determined as needed.

[0032] To prevent safety hazards caused by exposed live parts such as contacts after the circuit breaker body is pulled out of the drawer, a pair of baffles and a pressing element can be installed on the base. The baffle pair consists of two baffles stacked on the support surface of the base and capable of sliding relative to each other. The relative sliding of the two baffles is driven by the pressing element. When the circuit breaker body is pulled out of the drawer, the pressing element returns to its original position under the action of a spring. Driven by the pressing element, the two baffles slide relative to each other to cover the live parts. When the circuit breaker body is inserted into the drawer, the circuit breaker body pushes against the pressing element. Driven by the pressing element, the two baffles slide relative to each other to expose the contacts.

[0033] The pressing component is elastically and telescopically mounted in a mounting slot on the base, with its extension and retraction direction perpendicular to the two baffles. Two guide rails are provided on the same side of the pressing component, each including an oblique segment, resulting in a variable distance between them. Sliding grooves are formed on the outer peripheral walls of the two baffles, which slidably engage with the two guide rails on the pressing component. When the pressing component extends or retracts relative to the mounting slot, the two baffles slide relative to each other under the drive of the oblique segments of the guide rails, thus exposing the contacts for connection with the incoming and outgoing copper busbars of the circuit breaker, or obscuring the contacts to avoid safety hazards. However, when the two baffles slide relative to each other under the push of the oblique segments of the guide rails, the oblique segments simultaneously exert a component force on the two baffles away from the support surface. This component force can easily cause the two baffles to bulge in the direction away from the support surface, resulting in uneven sliding of the two baffles.

[0034] The embodiments of this disclosure provide a drawer-type circuit breaker and its drawer holder and safety baffle device, which can effectively prevent the two baffles stacked together from bulging in the direction away from the support surface of the base, thus ensuring smooth sliding of the two baffles. In the following, in conjunction with... Figures 1 to 11 The principles of this disclosure are described.

[0035] Figure 1 A perspective view of a safety baffle device according to some embodiments of the present disclosure is shown, wherein the baffle pair 20 is in a first state. Figure 2 It shows Figure 1 Another perspective view of the safety baffle device shown, wherein the baffle pair 20 is in the second state. Figure 3 It shows Figure 2 Enlarged diagram of point A in the diagram. Figure 4 It shows Figure 1 An exploded view of the safety barrier device shown. Figure 5 It shows Figure 4 A three-dimensional schematic diagram of the pressing element 30 from another perspective. Figure 6 It shows Figure 4 An exploded view of the two baffles from another perspective.

[0036] See Figures 1 to 3 The safety baffle device includes a base 10, a baffle pair 20, a pressing member 30, and a limiting member 40. As previously described, the safety baffle device is applied to the drawer rack of a drawer-type circuit breaker. The drawer rack may also include a bottom wall, a left side wall, a right side wall, and a top wall (not shown). The bottom wall, left side wall, right side wall, and top wall define a front opening and a rear opening. The front opening is used to install the circuit breaker body (not shown in the figure), and the rear opening is closed by the base 10.

[0037] See Figure 4 and Figure 5The base 10 has a support surface 11 and a mounting groove 12. The support surface 11 has a front opening and is used to support the baffle pair 20. The mounting groove 12 is used to install the pressing member 30. In some embodiments, contacts 18 may also be provided on the base 10, and the number of contacts 18 is set as needed. Each contact 18 is used for electrical connection with the incoming copper busbar or the outgoing copper busbar of the circuit breaker body.

[0038] The baffle pair 20 includes two baffles stacked together, namely baffle 21 and baffle 22. Baffle 22 contacts the support surface 11 and is capable of sliding relative to the support surface 11 in a predetermined direction. Baffle 21 is located outside baffle 22. Baffles 21 and 22 can also slide relative to each other in a predetermined direction. Figure 1 In the illustrated embodiment, the preset direction is vertical, and the safety baffle device is suitable for circuit breaker bodies with horizontally arranged incoming and outgoing copper busbars. In other embodiments, the preset direction may be, for example, horizontal, to suit circuit breaker bodies with vertically arranged incoming and outgoing copper busbars.

[0039] In some embodiments, baffle 21 includes two sides 219 parallel to a preset direction, and a plurality of clearance grooves 2190 are formed on each side 219. Baffle 22 includes two sides 229 parallel to a preset direction, and a plurality of clearance grooves 2290 are formed on each side 229. When baffle 21 and baffle 22 are stacked together, the two sides 219 and the two sides 229 correspond to each other. A plurality of pressing blocks 19 are provided on the base 10, a portion of the plurality of pressing blocks 19 corresponding to one side 219 and one side 229, and another portion of the plurality of pressing blocks 19 corresponding to another side 219 and another side 229. A space for accommodating baffle 21 and baffle 22 is formed between each pressing block 19 and the support surface 11.

[0040] The baffle pair 20 can contact the support surface 11 through the cooperation of multiple clearance slots 2190 and pressure blocks 19. Specifically, baffles 21 and 22 are first stacked together with their clearance slots 2190 aligned with each other. Then, the multiple clearance slots 2190 on the two baffles are aligned with the multiple pressure blocks 19, and then the two baffles are brought close to the support surface 11. When baffle 22 contacts the support surface 11, each pressure block 19 passes through the clearance slots 2190 on baffles 22 and 21 in sequence and is located outside baffle 21. Then, the baffle pair 20 is slid along the support surface 11, so that the positions of the multiple pressure blocks 19 and the multiple clearance slots 2190 are staggered, and baffles 21 and 22 are clamped between the pressure blocks 19 and the support surface 11.

[0041] In some embodiments, the base 10 may also be provided with a limiting profile that cooperates with the two sides 219 of the baffle 21 and the two sides 229 of the baffle 22. The limiting profile guides the sliding of the baffle 21 and the baffle 22 in a preset direction and restricts the relative sliding of the baffle 21 and the baffle 22 in a direction perpendicular to the preset direction.

[0042] The baffle 21 is provided with a first sliding hole 211 and a slot 212, and the baffle 22 is provided with a first sliding hole 221 and a slot 222. The extending directions of the first sliding hole 211 and the second sliding hole 221 are both parallel to a preset direction. The first sliding hole 211 and the second sliding hole 221 are used to slide and engage with the limiting member 40. In some embodiments, the extending directions of the slots 212 and 222 are both perpendicular to the preset direction. The number of slots 212 and 222 corresponds to the number of contacts 18.

[0043] See Figure 1 , Figure 2 and Figure 4 By adjusting the relative positions of baffles 21 and 22, the baffle pair 20 has a first state and a second state. In the first state, the multiple slots 212 on baffle 21 and the multiple slots 222 on baffle 22 are aligned, and each contact 18 is exposed through the corresponding slots 212 and 222 to connect to the incoming or outgoing copper busbar of the circuit breaker body. In the second state, the slots 212 on baffle 21 and the slots 222 on baffle 22 are staggered, the slots 212 on baffle 21 are covered by baffle 22, and each contact 18 is covered by the baffle pair 20 and is not exposed. By covering all contacts 18 with two baffles (baffle 21 and baffle 22), it is beneficial to reduce the number of parts in the safety baffle device and simplify the installation process of the safety baffle device.

[0044] The pressing member 30 is elastically and telescopically disposed in the mounting groove 12 and is used to drive the baffles 21 and 22 to slide relative to each other, so that the baffle pair 20 switches between a first state and a second state. In some embodiments, the telescopic direction of the pressing member 30 is perpendicular to a preset direction, that is, the telescopic direction of the pressing member 30 is perpendicular to the two baffles.

[0045] See Figures 3 to 5 An exemplary embodiment of the pressing member 30 is shown. The pressing member 30 includes a main body 31 and a button portion 32 located at one end of the main body 31. The main body 31 is slidably engaged with a mounting groove 12, and the elastic extension and retraction of the pressing member 30 relative to the mounting groove 12 is achieved by a spring 50 disposed in the mounting groove 12 and abutting against the main body 31. The button portion 32 is located outside the mounting groove 12 to withstand pressure or other external forces from the circuit breaker body.

[0046] In some embodiments, the other end of the pressing member 30 may slide against the fixing seat 60, which is fixed in the mounting groove 12, for example, by abutting against a step in the mounting groove 12 via an elastic arm 61. The spring 50 may be clamped between the fixing seat 60 and the main body 31 of the pressing member 30. Any suitable limiting structure may be provided between the fixing seat 60 and the main body 31 to prevent the main body 31 from accidentally dislodging from the fixing seat 50. It is understood that in some alternative embodiments, the fixing seat 60 may be omitted, the spring 50 may be clamped between the bottom of the mounting groove 12 and the main body 31, and a suitable limiting structure (e.g., an elastic arm) may be provided on the main body 31 of the pressing member 30 to prevent the pressing member 30 from accidentally dislodging from the mounting groove 12.

[0047] When the circuit breaker body is not inserted into the bracket 10, the pressing member 30 is pushed by the spring 50 and moves to the extended position. When the circuit breaker body is inserted into the bracket 10, the pressing member 30 is pressed by the circuit breaker body and moves to the first retracted position. When it is necessary to remove or install the baffle pair 20, the installer can apply external force to the pressing member 30 to move it to the second retracted position. The button part 32 is closer to the slot opening of the mounting groove 12 when the pressing member 30 is in the second retracted position than when the pressing member 30 is in the first retracted position.

[0048] When the pressing member moves between the extended position and the first retracted position, the drive baffles 21 and 22 slide relative to each other, causing the baffle pair 20 to switch between a first state and a second state. When the pressing member 30 is in the extended position, the baffle pair 20 is in the second state. When the pressing member 30 is in the first retracted position, the baffle pair 20 is in the first state.

[0049] See Figure 3 , Figure 4 and Figure 5 This illustrates an exemplary embodiment in which the pressing member 30 drives two baffles to slide relative to each other. For example, two guide rails 311 are provided on one side of the main body 31 of the pressing member 30. Each guide rail 311 includes a first straight segment 3111, a second straight segment 3112, and a diagonal segment 3113 located between the first straight segment 3111 and the second straight segment 3112. The distance between the two first straight segments 3111 of the two guide rails 311 is greater than the distance between the two second straight segments 3112. The second straight segments 3112 of the two guide rails 311 are adjacent to the button portion 32. In some embodiments, a gap 320 is formed between the two second straight segments 3112 of the two guide rails 311 and the button portion 32.

[0050] Both baffle 21 and baffle 22 have mating edges adjacent to the two guide rails 311. Specifically, baffle 21 includes a mating edge 213, and baffle 22 includes a mating edge 223. The mating edge 213 can be formed on the outer periphery of baffle 21, or it can be formed on the wall of the through hole 2101 on baffle 21 (e.g., Figure 4 (As shown). Similarly, the mating edge 223 can be formed on the outer periphery of the baffle 22, or it can be formed on the wall of the through hole 2201 on the baffle 22 (as shown). Figure 4 (As shown).

[0051] A groove 2131 and a protrusion 2132 adjacent to the groove 2131 are formed on the mating edge 213. A groove 2231 and a protrusion 2232 adjacent to the groove 2231 are formed on the mating edge 223. The groove 2131 is in sliding engagement with one of the two guide rails 311, and the groove 2231 is in sliding engagement with the other guide rail 311. The protrusions 2132 and 2232 are located between the two guide rails 311.

[0052] When the pressing member 30 switches between the extended position and the first retracted position, the two baffles slide relative to each other in a preset direction through the cooperation of the sliding grooves 2131 and 2231 with the two guide rails 311, thereby switching the baffle pair 20 to the first state or the second state. During the process of the pressing member 30 moving to the extended position, the inclined segments 3113 of the two guide rails 311 will apply a component force away from the support surface 11 to the two baffles. This component force can easily cause the two baffles to bulge in the direction away from the support surface 11, affecting the cooperation between the sliding grooves of the two baffles and the two guide rails 311, resulting in the two baffles sliding unevenly.

[0053] In some embodiments, when the baffle pair 20 is switched to the first state, the protrusions 2132 and 2232 are stacked together and located between the two second straight segments 3112 of the two guide rails 311.

[0054] In some embodiments, a protrusion 2133 is also formed on the mating edge 213, and a groove 2131 is located between the protrusions 2132 and 2133. A protrusion 2233 is also formed on the mating edge 223, and a groove 2231 is located between the protrusions 2232 and 2233. In some embodiments, when the pressing member 30 is pressed to the second retracted position, the stacked protrusions 2132 and 2232 can move to the outside of the two guide rails 311 through the gap 320, and either the protrusion 2133 or the protrusion 2233 can also move from one side of the two guide rails 311 to the other side of the two guide rails 311 through the gap 320, so that the button portion 32 avoids the respective protrusions without preventing the baffle pair 20 from being removed from the support surface 11.

[0055] See Figure 4In some embodiments, the through hole 2101 may include a clearance region 2102, which may be formed at at least one end of the through hole 2101. Similarly, the through hole 2201 may include a clearance region 2202, which may be formed at at least one end of the through hole 2201. Both the clearance regions 2102 and 2202 are through which the button portion 32 of the pressing member 30 can pass.

[0056] See Figure 4 In some embodiments, the limiting member 40 includes a connecting portion 41 and a limiting portion 42. The connecting portion 41 is connected to the support surface 11 and is spaced a predetermined distance from the mounting groove 12 in a direction perpendicular to a preset direction. The connecting portion 41 slidably engages with a first sliding hole 211 and a second sliding hole 221 on the two baffles. In some embodiments, the limiting portion 42 extends, for example, from the end of the connecting portion 41 away from the support surface 11 to form a space between it and the support surface 11 to accommodate the two baffles, thereby clamping the two baffles.

[0057] It should be noted that the connection part 41 described in this embodiment is spaced at a predetermined distance from the mounting groove 12 in a direction perpendicular to the preset direction. This does not mean that the connection part 41 is strictly limited to the center line of the mounting groove 12 perpendicular to the preset direction. The connection part 42 may be offset from the center line of the mounting groove 12 perpendicular to the preset direction within a certain range.

[0058] In the drawer rack of the circuit breaker provided in the embodiments of this disclosure, the connecting portion 41 of the limiting member 40 is spaced a predetermined distance from the mounting groove 12 in a direction perpendicular to the preset direction. The limiting portion 42 of the limiting member 40 applies pressure to the two baffles, which can specifically improve the phenomenon that when the two baffles slide under the drive of the pressing member 30, the component force exerted by the inclined segment 3113 of the two guide rails 311 away from the support surface 11 causes the two baffles to bulge, affecting the cooperation between the sliding grooves of the two baffles and the two guide rails 311, resulting in the two baffles sliding unevenly. Thus, smooth sliding of the two baffles is ensured.

[0059] In some embodiments, the limiting member 40 may be T-shaped, L-shaped, or other suitable shape. In some embodiments, the limiting member 40 may be arranged close to the mounting groove 12 to approach the area where the two baffles are prone to bulging due to the component force applied by the inclined segments 3113 of the two guide rails 311.

[0060] See Figure 3 and Figure 4In some embodiments, baffle 21 includes a clearance hole 214 located at at least one end of the first sliding hole 211, and baffle 22 includes a clearance hole 224 located at at least one end of the second sliding hole 221. The clearance holes 214 and 224 are larger than the limiting portion 42 to allow the limiting portion 42 to pass through.

[0061] In some embodiments, a first indicator mark 2115 is provided on the baffle 21, indicating the position of the boss 2132 on the baffle 21. A second indicator mark 33 is provided on the button portion 32 of the pressing member 30, indicating the position between the second straight segments 3112 of the two guide rails 311. In some embodiments, the first indicator mark 2115 and the second indicator mark 33 can be indicator arrows. By providing the first indicator mark 2115 and the second indicator mark 33, the correct installation direction of the baffle pair 20 can be quickly determined, thereby improving the efficiency of installing the baffle pair 20 onto the base 10.

[0062] It should be noted that the number of pressing parts 30 and limiting parts 40 that cooperate with each pair of baffles 20 can be designed as needed and is not limited here.

[0063] Reference Figure 4 and Figure 6 In some embodiments, the baffles 21 and 22 of each pair of baffles 20 have the same structure, which can reduce mold costs. Of course, in some alternative embodiments, the structures of baffles 21 and 22 may not be the same. It is understood that when baffles 21 and 22 are the same, a first indicator mark may also be provided on baffle 22.

[0064] The assembly process of the base 10, baffle pair 20 and pressing member 30 in the above embodiment is briefly described below:

[0065] Insert the pressing member 30 into the mounting slot 12. Flip one of the baffles 21 and 22, which have the same structure, 180 degrees, and then align the boss 2132 of the baffle 21 and the boss 2232 of the baffle 22 (i.e., the bosses 2132 and 2232 are stacked together). At this time, the plurality of clearance slots 2190 of the baffle 21 and the plurality of clearance slots 2290 of the baffle 22 are aligned, and the plurality of slots 212 of the baffle 21 and the plurality of slots 222 of the baffle 22 are aligned.

[0066] Bring the stacked baffles 21 and 22 close to the support surface 11. Adjust the position of the baffle pair 20 so that the multiple clearance grooves 2190, multiple clearance grooves 2290 and multiple pressure blocks 19 are aligned, the clearance areas 2102 and 2202 are opposite to the button portion 32 of the pressing member 30, and the clearance holes 214 and 224 are opposite to the limiting portion 42 of the limiting member 40. Then the baffle pair 20 can be placed on the support surface 11.

[0067] Press the pressing member 30 to the second retracted position, and move the baffle pair 20 along the support surface 11. When the stacked protrusions 2132 and bosses 2232 are aligned with the area between the second straight segments 3112 of the two guide rails 311, release the pressing member 30. As the pressing member 30 moves to the extended position driven by the spring 50, the protrusions 2132 and 2232 first enter between the second straight segments 3112 of the two guide rails 311, and the grooves 2131 and 2231 slide in engagement with the two guide rails 311. As the pressing member 30 moves to the extended position, the baffles 21 and 22 slide relative to each other, and the plurality of slots 212 of the baffle 21 and the plurality of slots 222 of the baffle 22 are misaligned.

[0068] Figure 7 A perspective view of a safety baffle device according to some other embodiments of the present disclosure is shown, wherein the baffle pair 20 is in a first state. Figure 8 It shows Figure 7 Another perspective view of the safety baffle device shown, wherein the baffle pair 20 is in the second state. Figure 9 It shows Figure 7 An exploded view of the base and pressing element of the safety baffle device shown. Figure 10 It shows Figure 7 An exploded view of the baffle pair 20 in the safety baffle device shown. Figure 11 It shows Figure 7 A cross-sectional view of the second sliding hole.

[0069] Figure 7 The safety baffle device in the middle has the same Figure 1 The safety barrier device shown is a similar mechanism, in the absence of conflict. Figure 7 The safety baffle device mentioned above can be referenced. Figure 1 The safety barrier device described in the text will be further explained below, with the differences between the two described in detail.

[0070] See Figure 7 The safety baffle device includes two pairs of baffles 20, which are arranged adjacent to each other in a direction perpendicular to a preset direction. Each pair of baffles 20 is equipped with a pressing member 30 and a limiting member 40. Thus, the baffles 21 and 22 of each pair of baffles 20 are small-area, thin-walled parts, making each baffle easier to injection molded. Furthermore, because the two baffles in each pair of baffles 20 have small dimensions, each baffle can be injection molded using a small-tonnage mold, thereby reducing mold costs.

[0071] In some embodiments, the two pairs of baffles 20 have different dimensions and their structures may not be exactly the same. See also Figure 7 and Figure 10In some embodiments, the baffles 21 and 22 of the left baffle pair 20 are narrower, and the joint edge 213 of the left baffle 21 can be directly formed on the outer periphery of the baffle 21, and the joint edge of the left baffle 22 can be directly formed on the outer periphery of the baffle 22. The baffles 20 of the right baffle pair 20 are wider, and the joint edge 213 of the right baffle 21 can be formed on the wall of the through hole 2101, and the joint edge 223 of the right baffle 22 can be formed on the wall of the through hole 2201. Of course, in some alternative embodiments, the structures of the two pairs of baffles 20 can be the same.

[0072] See Figure 7 and Figure 8 as well as Figure 10 and Figure 11 In some embodiments, each baffle pair 20 has a second sliding hole on each of its two baffles, and a guide member is provided on each of its two baffles. For ease of explanation, let's take... Figure 7 Taking the left side baffle 20 as an example, baffle 21 is provided with a second sliding hole 215 and a guide 216, and baffle 22 is provided with a second sliding hole 225 and a guide 226. (See also...) Figure 11 The guide member 216 on baffle 21 extends into the second sliding hole 225 on baffle 22 and slides in engagement with the second sliding hole 225. The guide member 226 on baffle 22 extends into the second sliding hole 215 on baffle 21 and slides in engagement with the second sliding hole 215. Through the cooperation of the second sliding hole and the corresponding guide member, the two baffles of baffle pair 20 can be guided to slide relative to each other in a preset direction.

[0073] Continue with Figure 7 Taking the left side baffle 20 as an example. In some embodiments, a resilient hook 217 is provided on the baffle 21 (see...). Figure 11 The baffle 22 is also provided with an elastic hook 227. The elastic hook 217 on the baffle 21 can engage with the edge of the second sliding hole 225 on the baffle 22. The elastic hook 227 on the baffle 22 can engage with the edge of the second sliding hole 215 on the baffle 21. Through the engagement of the elastic hook and the corresponding second sliding hole, on the one hand, the two baffles of the baffle pair 20 can be guided to slide relative to each other in a preset direction, and on the other hand, the two baffles of the baffle pair 20 can be kept in close contact without creating a large gap.

[0074] In some embodiments, the elastic hooks 217 are arranged in pairs, and the elastic hooks 227 are also arranged in pairs, with each pair of elastic hooks engaging with the opposite two edges of the corresponding second sliding hole.

[0075] Continue with Figure 7Taking the left baffle pair 20 as an example, in some embodiments, a limiting protrusion 228 may be provided on the baffle 22. When the baffle pair 20 switches from the second state to the first state, the limiting protrusion 228 can abut against the limiting step 17 on the base 10 to restrict the two baffles from continuing to slide relative to each other in the original direction, which helps to ensure the alignment of the multiple slots on the two baffles with the contacts on the base 10. In some embodiments, when the structures of the baffle 21 and the baffle 22 are the same, a limiting protrusion 218 is also provided on the baffle 21 accordingly.

[0076] Furthermore, during the assembly of the baffle pair 20 to the base 10, when the baffle pair 20 moves along the support surface 11 to abut against the limiting protrusion 218 and the limiting step 17, the stacked protrusions 2132 and 2232 are precisely aligned with the area between the second straight segments 3112 of the two guide rails 311, and then the pressing member 30 can be released. The cooperation between the limiting protrusion 218 and the limiting step 17 can improve the installation efficiency of the baffle pair 20.

[0077] It is understood that the baffles 21 and 22 of the right baffle pair 20 may have the same function as the baffles 21 and 22 of the left baffle pair 20, such as a second sliding hole, guide, elastic hook and limiting protrusion 228, etc., which will not be described in detail here.

[0078] It should be noted that, although in Figure 7 In the illustrated embodiment, the safety baffle device includes two pairs of baffles 20. It is understood that in other embodiments, the safety baffle device may include more pairs of baffles 20 and is not limited to two pairs of baffles 20.

[0079] Understandable. Figure 7 The second sliding hole, guide, elastic hook, and limiting protrusion 228 in the illustrated embodiment can also be combined with... Figure 1 The safety barrier device shown is combined in detail here.

[0080] Embodiments of this disclosure also provide a drawer that includes a safety baffle device according to embodiments of this disclosure.

[0081] Embodiments of this disclosure also provide a drawer-type circuit breaker that includes a drawer according to embodiments of this disclosure.

[0082] In the embodiments according to this disclosure, the connecting portion 41 of the limiting member 40 is spaced a predetermined distance from the mounting groove 12 in a direction perpendicular to the preset direction. The limiting portion 42 of the limiting member 40 applies pressure to the two baffles of the same baffle pair 20. This can specifically improve the phenomenon that when the two baffles of the same baffle pair 20 slide under the drive of the pressing member 30, the two baffles bulge due to the component force exerted by the inclined segments 3113 of the two guide rails 311 away from the support surface 11, which affects the cooperation between the sliding grooves of the two baffles and the two guide rails 311, resulting in the two baffles sliding unevenly. Thus, smooth sliding of the two baffles of the same baffle pair 20 is ensured.

[0083] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A safety baffle device for a drawer-type circuit breaker, characterized in that, include: A base (10) for mounting a contact (18) and including a support surface (11) and a mounting groove (12); The baffle pair (20), supported by the support surface (11), includes two baffles (21, 22) stacked together and capable of sliding relative to each other in a predetermined direction; The pressing element (30) is elastically and telescopically disposed in the mounting groove (12) and is used to drive the two baffles (21,22) to slide relative to each other; as well as Limiting element (40), including: The connecting portion (41) is connected to the supporting surface (11) and is spaced a predetermined distance from the mounting groove (12) in a direction perpendicular to the preset direction; and The limiting part (42) extends from the connecting part (41) to form a space between itself and the supporting surface (11) to accommodate the two baffles (21, 22).

2. The safety baffle device according to claim 1, characterized in that, The limiting member (40) is L-shaped or T-shaped, and / or the limiting member (40) is arranged close to the mounting groove (12).

3. The safety baffle device according to claim 1 or 2, characterized in that, Each of the two baffles (21, 22) is provided with a first sliding hole (211, 221), and the connecting part (41) slides in cooperation with the first sliding hole (211, 221) on the two baffles (21, 22).

4. The safety baffle device according to claim 3, characterized in that, Each of the two baffles (21, 22) includes a clearance hole (214, 224) located at at least one end of the first sliding hole (211, 221), the clearance hole (214, 224) being larger in size than the limiting portion (42).

5. The safety baffle device according to claim 1 or 2, characterized in that, Each of the two baffles (21, 22) is provided with a second sliding hole (215, 225), and Each of the two baffles (21, 22) is provided with a guide (216, 226), and the guide (216, 226) on each baffle is slidably engaged with a second sliding hole (215, 225) on the other baffle, and / or Each of the two baffles (21, 22) is provided with an elastic hook (217, 227), and the elastic hook (217, 227) on each baffle engages with the edge of the second sliding hole (215, 225) on the other baffle.

6. The safety baffle device according to claim 1 or 2, characterized in that, Each of the two baffles (21, 22) is provided with a slot (212, 222), and the baffle pair (20) is switchable between a first state and a second state under the drive of the pressing member (30), wherein in the first state, the slots (212, 222) on the two baffles (21, 22) are aligned, and in the second state, the slots (212, 222) on the two baffles (21, 22) are staggered from each other, and At least one of the baffles (22) adjacent to the support surface (11) is provided with a limiting protrusion (228). When the baffle pair (20) switches from the second state to the first state, the limiting protrusion (228) abuts against the limiting step (17) on the base (10).

7. The safety baffle device according to claim 1 or 2, characterized in that, The two baffles (21, 22) have the same structure, and / or the preset direction is the vertical direction.

8. The safety baffle device according to claim 1 or 2, characterized in that, The safety baffle device includes at least two pairs of baffles (20), which are arranged adjacent to each other in a direction perpendicular to the preset direction.

9. The safety baffle device according to claim 1 or 2, characterized in that, The extension and retraction direction of the pressing member (30) is perpendicular to the preset direction, and the pressing member (30) includes: The main body (31) has two guide rails (311) on one side. Each of the two guide rails (311) includes a first straight line segment (3111), a second straight line segment (3112), and an oblique line segment (3113) located between the first straight line segment (3111) and the second straight line segment (3112). The distance between the two second straight line segments (3112) of the two guide rails (311) is less than the distance between the two first straight line segments (3111). A button section (32) is located at one end of the main body section (31) and is adjacent to the second straight segment (3112) of the two guide rails (311). The button section (32) is provided with a second indicator mark (33) indicating the position between the two second straight segments (3112) of the two guide rails (311); and Each of the two baffles (21, 22) includes a mating edge (213, 223) opposite to the two guide rails (311). Each mating edge (213, 223) has a groove (2131, 2231) and a protrusion (2132, 2232) adjacent to the groove (2131, 2231). The groove (2131, 2231) slides with the corresponding guide rail of the two guide rails (311), and the protrusion (2132, 2232) is located between the two guide rails (311). A first indicator mark (2115) is provided on the baffle (21) at least away from the support surface (11), the first indicator mark (2115) indicating the position of the protrusion (2132) on the same baffle as the first indicator mark (2115).

10. A drawer unit, characterized in that, Includes the safety baffle device according to any one of claims 1 to 9.

11. A drawer-type circuit breaker, characterized in that, Includes the drawer as described in claim 10.

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