A safety lock and a circuit breaker

Abstract

The present invention relates to the technical field of components of operating or releasing mechanisms, and particularly relates to a safety lock and a circuit breaker. The safety lock is used to lock the position of a handle, and is located on the side of the handle with a tendency to move. The handle passes through a housing, and it includes a first lock body, a second lock body, a limiting member and a locking member: one end of the first lock body has a first lock rod extending into a lock hole in the housing; the second lock body is movably connected to the first lock body; the limiting member is connected to the first lock body and the second lock body to fix the relative position between the first lock body and the second lock body; the locking member is fixedly connected to the limiting member and the first lock body, or fixedly connected to the limiting member and the second lock body. The safety lock of the present invention has the advantages of being safe and reliable, having a simple structure, a small volume, a low cost and being easy to install.

Description

Technical Field

[0001] The present invention relates to the technical field of components of operating or releasing mechanisms, and particularly to a safety lock and a circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions and can also close, carry, and interrupt the current under abnormal circuit conditions within a specified time. The safety lock of a circuit breaker is an electrical protection tool. When the circuit breaker equipment is under repair or maintenance, the circuit breaker needs to maintain a certain state. To prevent misoperation, a safety lock is generally used to block the movement of the handle of the circuit breaker to prevent danger caused by misoperation.

[0003] The structure of the traditional safety lock of a circuit breaker is relatively complex, and the assembly method is cumbersome. It is necessary to borrow the connecting screws of the circuit breaker cover and the base to fix the safety lock, resulting in a high cost. Moreover, some safety locks will also occupy the internal space of the circuit breaker cavity, affecting the installation of internal accessories of the circuit breaker. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the complex structure and high cost of the safety lock of the circuit breaker in the prior art, so as to provide a safety lock with a simple and reliable structure, small volume, low cost, and easy installation, and a circuit breaker provided with the safety lock.

[0005] To solve the above problems, the safety lock of the present invention is used to lock the position of the handle and is located on the side of the handle with a tendency to move. The handle passes through the housing and includes a first lock body, a second lock body, a limiting member, and a locking member: one end of the first lock body has a first lock rod extending into the lock hole of the housing; the second lock body is movably connected to the first lock body; the limiting member is connected to the first lock body and the second lock body to fix the relative position between the first lock body and the second lock body; the locking member is fixedly connected to the limiting member and the first lock body, or fixedly connected to the limiting member and the second lock body.

[0006] A first hole is provided on the second lock body, the other end of the first lock body is a penetrating end passing through the first hole, the limiting member is sleeved on the second lock body, and the limiting end of the limiting member facing the first lock body is inserted into the first lock body.

[0007] A positioning groove for inserting the limiting end is provided on the penetrating end, and the width of the positioning groove is adapted to the wall thickness of the limiting end.

[0008] The limiting member is of a cylindrical structure and is sleeved outside the second lock body. There are two positioning grooves for inserting the two side walls of the limiting end.

[0009] The first lock body is Z-shaped, the penetrating end is the upper horizontal part, and the first lock rod is the lower horizontal part.

[0010] The direction in which the first lock rod is inserted into the lock hole is perpendicular to or coincides with the moving direction of the handle.

[0011] On one side of the second lock body away from the first lock rod, a second lock rod is provided. The second lock rod is adapted to be inserted into another lock hole of the housing. The straight line where the first lock rod and the second lock rod are located is perpendicular to the moving direction of the handle.

[0012] The first lock rod and the second lock rod have the same structure. The lower hole wall of the first hole of the second lock body is in the same plane as the upper surface of the second lock rod.

[0013] On the upper side wall of the second lock body, a buckle is provided. On the limiting member, a moving slot for the buckle to move is provided, and a limiting portion located at the lower end of the moving slot to prevent the buckle from moving out of the moving slot. The buckle can pass through the limiting portion and enter the moving slot.

[0014] It further includes a biasing member provided between the upper end of the second lock body and the top wall of the limiting member. The biasing member provides a biasing force for the limiting member away from the second lock body.

[0015] The top of the groove wall of the positioning groove on the penetrating end away from the first lock rod is higher than the upper surface of the penetrating end by a set distance. When the second lock body and the limiting member are in the sleeved position, the bottom of the limiting end is higher than the upper surface of the penetrating end and lower than the top of the groove wall of the positioning groove away from the first lock rod.

[0016] The second lock body and the limiting member are provided with padlock holes. When in the locked position, the padlock holes on the second lock body and the limiting member coincide and can be locked by the locking member.

[0017] The circuit breaker of the present invention includes the above-mentioned safety lock, a handle, and a housing. The housing is provided with a moving cavity for the handle to penetrate and move. The cavity wall of the moving cavity is provided with a lock hole, and the first lock rod of the safety lock extends into the lock hole.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The safety lock of the present invention is used to lock the position of the handle and is located on the side of the handle with a tendency to move. The handle passes through the housing and includes a first lock body, a second lock body, a limiting member, and a locking member. One end of the first lock body has a first lock rod extending into the lock hole of the housing; the second lock body is movably connected to the first lock body; the limiting member is connected to the first lock body and the second lock body to fix the relative position between the first lock body and the second lock body; the locking member is fixedly connected to the limiting member and the first lock body, or fixedly connected to the limiting member and the second lock body. For the safety lock of the present invention, move the first lock body and the second lock body, extend the first lock rod into the lock hole, then install the limiting member, and use the limiting member to fix the relative position of the first lock body and the second lock body, so that the safety lock is fixed in the lock hole; then use the locking member to fixedly connect the limiting member and the first lock body, or fixedly connect the limiting member and the second lock body to prevent the limiting member from detaching from the first lock body or the second lock body and thus losing the fixation of the relative position between the first lock body and the second lock body, making the safety lock safer and more reliable. At the same time, the safety lock of the present invention also has the advantages of simple structure, small volume, low cost, and easy installation.

[0020] 2. For the safety lock of the present invention, the setting of the positioning groove can ensure the firmness of the insertion connection between the limiting member and the first lock body, making the safety lock safer and more reliable.

[0021] 3. The safety lock of the present invention is provided with a first lock rod and a second lock rod. The straight lines where the first lock rod and the second lock rod are located are perpendicular to the moving direction of the handle. When installing the safety lock, it does not occupy the space in the moving direction of the handle, reduces the touch on the handle, can reduce the misoperation of the handle, and is safer; and it is not restricted by the handle during installation, making the installation more convenient.

[0022] 4. For the safety lock of the present invention, the setting of the buckle on the second lock body and the limiting part on the limiting member can prevent the free separation of the second lock body and the limiting member, prevent the loss of the second lock body or the limiting member, and can be assembled before being installed on the housing, making the installation of the safety lock convenient. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram when the safety lock of the present invention is in use;

[0025] Figure 2 Schematic structural diagram of the first lock body of the present invention;

[0026] Figure 3 Schematic structural diagram of the second lock body of the present invention;

[0027] Figure 4 Schematic structural diagram of the limiting member of the present invention;

[0028] Figure 5 is Figure 4 Schematic structural diagram of the limiting member from another angle in

[0029] Figure 6 Schematic diagram of the installation steps of the safety lock of the present invention Figure 1 ;

[0030] Figure 7 Schematic diagram of the installation steps of the safety lock of the present invention Figure 2 ;

[0031] Figure 8 Schematic diagram of the installation steps of the safety lock of the present invention Figure 3 ;

[0032] Explanation of reference numerals:

[0033] 1 - First lock body; 11 - First lock rod; 12 - Penetrating end; 13 - Positioning groove; 14 - Lock hook; 2 - Second lock body; 21 - First hole; 22 - Second lock rod; 23 - Buckle; 24 - Mounting post; 25 - Padlock hole; 3 - Limiting member; 31 - Installation cavity; 32 - Limiting end; 33 - Moving groove; 34 - Limiting portion; 35 - Anti-slip rib; 4 - Locking member; 5 - Biasing member; 6 - Housing; 7 - Handle. Detailed implementation manners

[0034] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Embodiment 1:

[0038] The safety lock of this embodiment is used to lock the position of the handle 7. As Figure 1 - Figure 8 shown, it is located on the side of the handle 7 with a tendency to move. The handle 7 passes through the housing 6. Two lock holes are provided on the housing 6, and the connection line of the two lock holes is perpendicular to the moving direction of the handle 7. The safety lock includes a first lock body 1, a second lock body 2, a limiting member 3, a locking member 4, and a biasing member 5.

[0039] As Figure 1 shown, one end of the first lock body 1 is a first lock rod 11 extending into the lock hole of the housing 6, and the other end is a penetrating end 12. The first lock body 1 is Z-shaped. The penetrating end 12 is the upper horizontal part, and the first lock rod 11 is the lower horizontal part. Two positioning grooves 13 are provided on the penetrating end 12, and the top of the groove wall of the positioning groove 13 on the penetrating end 12 far from the first lock rod 11 is higher than the upper surface of the penetrating end 12 by a set distance. The end of the first lock rod 11 has a lock hook 14 formed by the downward depression of the upper surface of the first lock rod 11. The lock hook 14 matches the size of the lock hole. The lock hook 14 is inserted into the lock hole. The step surface between the end of the first lock rod 11 far from the lock hook 14 and the lock hook 14 can limit the position of the lock hook 14, making the position of the safety lock more stable after locking.

[0040] As Figure 2As shown, the second lock body 2 is movably connected to the first lock body 1. A first hole 21 for the insertion end 12 to pass through and move is provided on the second lock body 2. A second lock rod 22 is provided on the side of the second lock body 2 away from the first lock rod 11. The second lock rod 22 has the same structure as the first lock rod 11. The second lock rod 22 is also inserted into another lock hole on the housing 6. The straight lines where the first lock rod 11 and the second lock rod 22 are located are perpendicular to the moving direction of the handle 7. To facilitate the insertion of the insertion end 12 and make the structure stable, the lower hole wall of the first hole 21 and the upper surface of the second lock rod 22 are in the same plane.

[0041] As Figure 3 and Figure 4 As shown, the limiting member 3 has a cylindrical structure, with an installation cavity 31 for accommodating the second lock body 2 and a limiting end 32 facing the first lock body 1 and inserted into the first lock body 1. The limiting member 3 is sleeved outside the second lock body 2. When the limiting end 32 is inserted into the positioning groove 13, the relative position between the first lock body 1 and the second lock body 2 is fixed. In this embodiment, both side walls of the limiting end 32 are inserted into the corresponding positioning grooves 13, and the width of the positioning groove 13 is adapted to the wall thickness of the limiting end 32. To facilitate the pressing of the limiting member 3, anti-slip ridges 35 are provided at the top of the limiting member 3.

[0042] To make the safety lock more convenient to use, before locking the handle 7, first assemble the safety lock, and then insert the first lock rod 11 and the second lock rod 22 of the safety lock into the corresponding lock holes. To facilitate the assembly and use of the safety lock, a buckle 23 is provided on the upper side wall of the second lock body 2, a moving groove 33 for the buckle 23 to move is provided on the limiting member 3, a limiting portion 34 for preventing the buckle 23 from moving out of the moving groove 33 is provided at the lower end of the limiting member 3 located in the moving groove 33, and the buckle 23 can pass through the limiting portion 34 and enter the moving groove 33. After the limiting member 3 is arranged behind the second lock rod 22, the limiting member 3 and the second lock rod 22 can move relative to each other but cannot be separated from each other. In this embodiment, the limiting portion 34 is the upper end of the limiting end 32.

[0043] Refer to Figure 7, a biasing member 5 is disposed between the upper end of the second lock body 2 and the top wall of the limiting member 3, and the biasing member 5 provides a biasing force for the limiting member 3 away from the second lock body 2. In this embodiment, the biasing member 5 is a compression spring, and a spring mounting post 24 is provided at the upper end of the second lock body 2. Meanwhile, when the second lock body 2 and the limiting member 3 are in the sleeved position, the bottom of the limiting end 32 is higher than the upper surface of the passing end 12 and lower than the top end of the groove wall of the positioning groove 13 away from the first lock rod 11. Such a setting can facilitate the movement of the first lock body 1, and at the same time, the limiting member 3 can prevent the first lock body 1 from disengaging from the second lock body 2.

[0044] Refer to Figure 8 , a locking member 4 is used to fixedly connect the limiting member 3 and the second lock body 2. Hanging lock holes 25 are provided on the second lock body 2 and the limiting member 3. When in the locked position, the hanging lock holes 25 on the second lock body 2 and the limiting member 3 coincide, and the locking member 4 passes through the hanging lock holes 25 to lock the second lock body 2 and the limiting member 3. In this embodiment, the locking member 4 is a padlock, and the hanging lock holes 25 are elongated holes.

[0045] The installation process of the safety lock is as Figure 6 and Figure 7 shown. First, insert the passing end 12 into the first hole 21, then move the first lock body 1 until the first lock body 1 abuts against the second lock body 2; install the spring on the mounting post 24; sleeved the limiting member 3 on the second lock body 2, and the buckle 23 is located in the moving groove 33. Due to the action of the compression spring, the buckle 23 abuts against the limiting portion 34, and at this time, it is in the sleeved position. Figure 8 In, the structural schematic diagram when the limiting member 3 is inserted into the first lock body 1.

[0046] The process of installing the safety lock on the housing 6 is as follows: first, move the first lock body 1 until the first lock rod 11 abuts against the second lock body 2, then place the safety lock on the side of the handle 7 with a tendency to move. First, insert the second lock rod 22 into the lock hole, then move the first lock body 1, insert the first lock rod 11 into another lock hole, and then press the limiting member 3 to make the hanging lock holes 25 on the second lock body 2 and the limiting member 3 coincide. Pass the locking member 4 through the hanging lock holes 25 to lock the position between the limiting member 3 and the second lock body 2. At this time, it is in the locked position, the limiting end 32 is inserted into the positioning groove 13, the positional relationship between the first lock body 1 and the second lock body 2 is fixed, and the position between the limiting member 3 and the first lock body 1 and the second lock body 2 is fixed, realizing the installation of the safety lock.

[0047] After the safety lock is installed on the housing 6, the safety lock can prevent the movement of the handle 7 to prevent danger caused by misoperation. Moreover, for the safety lock of this embodiment, move the first lock body 1 and the second lock body 2, insert the first lock rod 11 and the second lock rod 22 into the corresponding lock holes, and then install the limiting member 3. Use the limiting member 3 to fix the relative positions of the first lock body 1 and the second lock body 2, so that the safety lock is fixed in the lock holes; then use the locking member 4 to fixedly connect the limiting member 3 and the second lock body 2 to prevent the limiting member 3 from detaching from the second lock body 2 and disengaging the fixation of the relative positions of the first lock body 1 and the second lock body 2, making the safety lock safer and more reliable. At the same time, the safety lock also has the advantages of simple structure, small volume, low cost, and easy installation.

[0048] Embodiment Two:

[0049] The difference between this embodiment and Embodiment One is that there are two hanging lock holes 25, and the limiting member 3 and the second lock body 2 are connected through the two hanging lock holes 25. Of course, the number of hanging lock holes 25 can also be three, four, etc.

[0050] Embodiment Three:

[0051] The difference between this embodiment and Embodiment One is that the locking member 4 fixedly connects the limiting member 3 and the first lock body 1. At this time, locking portions for the locking member 4 to lock need to be provided on the limiting member 3 and the first lock body 1. The structure of the locking portion can be an existing structure and will not be elaborated here. The structure of the safety lock in this example is more complex than that in Embodiment One.

[0052] Embodiment Four:

[0053] The circuit breaker in this embodiment, as Figure 1 shown, includes the safety lock, the handle 7 and the housing 6 according to any one of Embodiments One to Three. The housing 6 is provided with a moving cavity for the handle 7 to pass through and move. Lock holes are provided on the cavity wall of the moving cavity, and the first lock rod 11 and the second lock rod 22 of the safety lock extend into the lock holes.

[0054] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A safety lock is used to lock the position of the handle (7), which is located on the side of the handle (7) with a tendency to move. The handle (7) is passed through the housing (6), and it is characterized in that, Comprising: A first lock body (1), one end of which has a first lock rod (11) extending into the lock hole of the housing (6). The end of the first lock rod (11) has a lock hook (14) formed by downward depression of the upper surface of the first lock rod (11), and the lock hook (14) matches the size of the lock hole; A second lock body (2), movably connected to the first lock body (1). A first hole (21) is provided on the second lock body (2), and the other end of the first lock body (1) is a penetrating end (12) penetrating through the first hole (21); A limiting member (3), connected to the first lock body (1) and the second lock body (2) to fix the relative position between the first lock body (1) and the second lock body (2). The limiting member (3) is sleeved on the second lock body (2), and the limiting end (32) of the limiting member (3) facing the first lock body (1) is inserted into the first lock body (1); A locking member (4), fixedly connecting the limiting member (3) and the first lock body (1), or fixedly connecting the limiting member (3) and the second lock body (2).

2. The safety lock according to claim 1, characterized in that, A positioning groove (13) for inserting the limiting end (32) is provided on the penetrating end (12), and the width of the positioning groove (13) is adapted to the wall thickness of the limiting end (32).

3. The safety lock according to claim 2, characterized in that, The limiting member (3) is of a cylindrical structure, sleeved outside the second lock body (2), and there are two positioning grooves (13) for inserting the two side walls of the limiting end (32).

4. The safety lock according to any one of claims 2-3, characterized in that, The first lock body (1) is Z-shaped, the penetrating end (12) is the upper horizontal part, and the first lock rod (11) is the lower horizontal part.

5. The safety lock according to any one of claims 1 to 3, characterized in that The direction in which the first lock rod (11) is inserted into the lock hole is perpendicular to or coincides with the moving direction of the handle (7).

6. The safety lock according to claim 5, characterized in that A second lock rod (22) is provided on the side of the second lock body (2) away from the first lock rod (11). The second lock rod (22) is adapted to be inserted into another lock hole of the housing (6), and the straight line where the first lock rod (11) and the second lock rod (22) are located is perpendicular to the moving direction of the handle (7).

7. The safety lock according to claim 6, characterized in that, The first lock rod (11) and the second lock rod (22) have the same structure, and the lower hole wall of the first hole (21) of the second lock body (2) is in the same plane as the upper surface of the second lock rod (22).

8. The safety lock according to any one of claims 1 to 3, characterized in that, A buckle (23) is provided on the upper side wall of the second lock body (2). A moving groove (33) for the buckle (23) to move is provided on the limiting member (3), and a limiting portion (34) for preventing the buckle (23) from moving out of the moving groove (33) is located at the lower end of the moving groove (33). The buckle (23) can pass through the limiting portion (34) and enter the moving groove (33).

9. The safety lock according to claim 8, characterized in that, Further comprising a biasing member (5) provided between the upper end of the second lock body (2) and the top wall of the limiting member (3), and the biasing member (5) provides a biasing force for the limiting member (3) away from the second lock body (2).

10. The safety lock according to claim 9, characterized in that, The top of the groove wall of the positioning groove (13) of the threading end (12) far from the first locking rod (11) is higher than the upper surface of the threading end (12) by a set distance. When the second lock body (2) and the limiting member (3) are in the sleeved position, the bottom of the limiting end (32) is higher than the upper surface of the threading end (12) and lower than the top of the groove wall of the positioning groove (13) far from the first locking rod (11).

11. The safety lock according to any one of claims 1 to 3, characterized in that, The second lock body (2) and the limiting member (3) are provided with padlock holes (25). When in the locked position, the padlock holes (25) on the second lock body (2) and the limiting member (3) coincide and can be locked by the locking member (4).

12. A circuit breaker, characterized in that: Comprising a safety lock according to any one of claims 1-11, a handle (7) and a housing (6). The housing (6) is provided with a moving cavity for the handle (7) to pass through and move. A lock hole is provided on the cavity wall of the moving cavity, and the first locking rod (11) of the safety lock extends into the lock hole.

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