Terminal cover for a circuit breaker

Abstract

To obtain a terminal cover of a circuit breaker which can be easily detached from the circuit breaker. A terminal cover (1) of a circuit breaker (2) has a measurement function and covers a terminal portion (20) of the circuit breaker (2), and has an elastic conductor portion (4), a measurement substrate (7), an engaging portion (5), and an engaging release button. The elastic conductor portion (4) is pressure-bonded to the terminal portion (20). The measurement substrate (7) is electrically connected to the elastic conductor portion (4). The engaging portion (5) is engaged with the circuit breaker (2). The engaging release button moves the engaging portion (5) in a direction in which the engagement of the circuit breaker (2) and the engaging portion (5) is released, and moves the terminal cover (1) relative to the circuit breaker (2) by a reaction force of the elastic conductor portion (4).

Description

Technical Field

[0001] This invention relates to a terminal cover for a circuit breaker that has a measuring function and covers the terminal portion of the circuit breaker. Background Technology

[0002] In circuit breakers such as wiring circuit breakers, terminal covers are installed to strengthen the insulation of exposed terminals and prevent contact. These terminal covers are typically installed using an embedded support structure that allows for easy installation and removal without screws, for added convenience.

[0003] For example, in Patent Document 1, as a mounting structure for a terminal cover that has a measuring function and covers the terminal portion of a circuit breaker, a mounting structure is disclosed in which the mounting portion of the terminal cover is inserted into the cover mounting hole of the circuit breaker from above the terminal portion of the circuit breaker to mount the terminal cover to the circuit breaker.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2002-298726

[0005] However, in the technology described in Patent Document 1, the force pushing the terminal portion upwards by the rebound force of the elastic conductor portion through which the voltage is introduced is applied to the circuit breaker. Therefore, it is necessary to increase the embedding strength of the mounted portion into the cover mounting hole to prevent the measuring device from detaching from the circuit breaker. If the embedding strength of the mounted portion into the cover mounting hole is increased, a strong force is required to remove the terminal cover from the circuit breaker. However, in the technology described in Patent Document 1, no mechanism for removing the terminal cover from the circuit breaker is provided, making it difficult to remove the terminal cover from the circuit breaker. Summary of the Invention

[0006] The present invention was made in view of the above circumstances, and its object is to provide a terminal cover for a circuit breaker that can be easily removed from the circuit breaker.

[0007] To address the aforementioned issues and achieve the objective, the terminal cover of the circuit breaker of the present invention has a measuring function, covering the terminal portion of the circuit breaker. The terminal cover includes an elastic conductor portion, a measuring substrate, an engaging portion, and an engaging / disengaging button. The elastic conductor portion is pressed against the terminal portion. The measuring substrate is electrically connected to the elastic conductor portion. The engaging portion engages with the circuit breaker. The engaging / disengaging button moves the engaging portion in a direction that releases the circuit breaker from the engaging portion, and the reaction force of the elastic conductor portion moves the terminal cover relative to the circuit breaker.

[0008] The effects of the invention

[0009] According to the present invention, it has the effect of being easily removable from the circuit breaker. Attached Figure Description

[0010] Figure 1 This is a perspective view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1.

[0011] Figure 2 This is a top view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1.

[0012] Figure 3 This is a side view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1.

[0013] Figure 4 This is a perspective view showing an example of the circuit breaker involved in Embodiment 1.

[0014] Figure 5 This is a perspective view showing an example of the terminal cover according to Embodiment 1.

[0015] Figure 6 This is a top view showing an example of the terminal cover according to Embodiment 1.

[0016] Figure 7 It is along Figure 6 The sectional view along line VII-VII shown.

[0017] Figure 8 It is along Figure 6 The cross-sectional view of line VIII-VIII shown.

[0018] Figure 9 This is a perspective view showing an example of the engaging portion according to Embodiment 1.

[0019] Figure 10 This is a perspective view showing an example of the engagement / disengagement button according to Embodiment 1.

[0020] Figure 11 It is along Figure 2 The sectional view of the XI-XI line shown.

[0021] Figure 12 yes Figure 11 A magnified view of region X shown.

[0022] Figure 13 This is a perspective view showing the state in which the engagement / disengagement button of the terminal cover of the circuit breaker according to Embodiment 1 is pressed in.

[0023] Figure 14 It is along Figure 13 The cross-sectional view of line XIV-XIV shown.

[0024] Figure 15 This diagram illustrates the operation of the latch release button as described in Embodiment 1 when it is pressed in.

[0025] Figure 16 This is a perspective view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 2.

[0026] Figure 17 This is a top view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 2.

[0027] Figure 18 This is a perspective view showing an example of the terminal cover according to Embodiment 2.

[0028] Figure 19 It is along Figure 17 The cross-sectional view of the XIX-XIX line shown.

[0029] Figure 20 This is a cross-sectional view showing the state in which the engagement / disengagement button of the terminal cover of the circuit breaker according to Embodiment 2 is pressed in.

[0030] Figure 21 yes Figure 20 A magnified view of the Y region shown.

[0031] Figure 22 This is a partially enlarged cross-sectional view showing the case where the terminal cover according to Embodiment 2 is installed on the circuit breaker according to Embodiment 1 and then removed from the circuit breaker. Detailed Implementation

[0032] The terminal cover of the circuit breaker according to the embodiments will now be described in detail based on the accompanying drawings.

[0033] Implementation method 1.

[0034] Figure 1 This is a perspective view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1. Figure 2 This is a top view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1. Figure 3 This is a side view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 1. Figure 4 This is a perspective view showing an example of the circuit breaker involved in Embodiment 1.

[0035] like Figures 1 to 3 As shown, the terminal cover 1 according to Embodiment 1 is installed on the circuit breaker 2. When the terminal cover 1 is installed on the circuit breaker 2, it will... Figure 4The terminal portion 20 of the circuit breaker 2 shown is covered.

[0036] Circuit breaker 2 is installed between a power supply device (not shown) and a load device (not shown). When the current flowing through the circuit between the power supply device and the load device meets a preset condition, it disconnects the circuit between the power supply device and the load device. Circuit breaker 2 is, for example, a wiring circuit breaker or a residual current circuit breaker.

[0037] For example, when the circuit breaker 2 is used as a wiring circuit breaker, it opens the circuit from a closed state to an open state when an overcurrent or short-circuit current flows through the circuit. Similarly, when the circuit breaker 2 is used as a residual current circuit breaker, it opens the circuit from a closed state to an open state when an overcurrent, short-circuit current, or leakage current flows through the circuit.

[0038] like Figure 4 As shown, the terminal section 20 of the circuit breaker 2 is provided for each circuit. Figure 4 In the example shown, the circuit breaker 2 is provided with three terminal sections 20 that are electrically connected to the wires that make up the corresponding circuits in the U-phase, V-phase and W-phase circuits.

[0039] Circuit breaker 2 in Figure 4 The example shown is a circuit breaker connected to a 3-phase 3-wire circuit, but it can also be a circuit breaker connected to a single-phase 2-wire circuit, a single-phase 3-wire circuit, or a 3-phase 4-wire circuit. Terminal sections 20 are provided in the circuit breaker 2 according to the number of circuits connected.

[0040] Each terminal portion 20 has a screw terminal 21 and a terminal screw 22. A screw hole is formed in the screw terminal 21. By engaging the terminal screw 22 with the screw hole formed in the screw terminal 21, a crimp terminal (not shown) provided at the front end of the wire forming the circuit is crimped between the screw terminal 21 and the terminal screw 22.

[0041] The circuit breaker 2 has a fixed contact, a movable contact, an opening and closing mechanism for contacting and separating the movable and fixed contacts, and a tripping mechanism that acts on the opening and closing mechanism to set the circuit breaker 2 to the tripping state when overcurrent or short-circuit current flows through the circuit.

[0042] The circuit breaker 2's frame 23 has partition walls 24 spaced apart in the arrangement direction of multiple terminal portions 20, with each terminal portion 20 surrounded by two adjacent partition walls 24 in the left-right direction. Engaging grooves 25 are formed in the partition walls 24 along their extending direction (vertical direction). Furthermore, an engaging step 26 is formed on the upper part of the partition walls 24 due to the difference in thickness in the left-right direction.

[0043] Next, the terminal cover 1 will be described. Figure 5 This is a perspective view showing an example of the terminal cover according to Embodiment 1. Figure 6 This is a top view showing an example of the terminal cover according to Embodiment 1. Figure 7 It is along Figure 6 The sectional view along line VII-VII shown. Figure 8 It is along Figure 6 The cross-sectional view of line VIII-VIII shown.

[0044] like Figure 5 As shown, the terminal cover 1 has a frame 3, an elastic conductor portion 4, a locking portion 5, and a locking release button 6. The frame 3 has multiple partition walls 31, multiple conductor mounting portions 33, and a substrate storage portion 34. Each partition wall 31 has a locking rib 32 that extends in the vertical direction and is inserted into the locking groove 25 of the circuit breaker 2.

[0045] The engaging rib 32 is inserted into the engaging groove 25 from the upper part, causing the engaging rib 32 to slide downward along the engaging groove 25, thereby engaging the engaging rib 32 with the engaging groove 25. Thus, as... Figure 1 As shown, the terminal cover 1 is installed on the circuit breaker 2.

[0046] In each conductor mounting part 33, as shown Figure 7 As shown, a mounting hole 33a is formed for inserting the conductor mounting portion 33 for mounting. The elastic conductor portion 4 is mounted on the conductor mounting portion 33 with a portion protruding from the mounting hole 33a. Each elastic conductor portion 4 is a conductive spring, and when the terminal cover 1 is mounted on the circuit breaker 2, it has a length that allows it to be pressed against a corresponding terminal portion 20 among the plurality of terminal portions 20 of the circuit breaker 2.

[0047] In the substrate storage section 34, as shown Figure 7 and Figure 8 As shown, a measuring substrate 7 is housed therein, and the measuring substrate 7 is electrically connected to one end of each elastic conductor portion 4. The measuring substrate 7 introduces the voltage of the plurality of terminal portions 20 through the plurality of elastic conductor portions 4, or introduces the detection result of a current sensor (not shown) disposed in the frame 23.

[0048] The measuring substrate 7 has a measuring function, that is, it measures the current flowing in the circuit, the voltage of the circuit, and the electrical force supplied to the load device through the circuit based on the detection result of the current sensor obtained from the current sensor and the voltage of the multiple terminal portions 20 obtained through the multiple elastic conductor portions 4.

[0049] When the circuit breaker 2 is equipped with the terminal cover 1, the engaging part 5 engages with the multiple engaging steps 26 formed in the frame 23 of the circuit breaker 2, thereby restricting the removal of the terminal cover 1 from the circuit breaker 2.

[0050] When the circuit breaker 2 is equipped with the terminal cover 1, the locking release button 6 is pressed into the inside of the frame 3, causing the locking part 5 to move in the direction of releasing the engagement between the circuit breaker 2 and the locking part 5.

[0051] With the terminal cover 1 installed on the circuit breaker 2, the elastic conductor 4 is pressed against the terminal 20. Therefore, if the engagement between the circuit breaker 2 and the engaging part 5 is released, the terminal cover 1 will move in the direction of removal from the circuit breaker 2 due to the reaction force of the elastic conductor 4. Thus, the terminal cover 1 can be easily removed from the circuit breaker 2.

[0052] Here, the engaging part 5 and the engaging / disengaging button 6 will be described in more detail. Figure 9 This is a perspective view showing an example of the engaging portion according to Embodiment 1. Figure 10 This is a perspective view showing an example of the engagement / disengagement button according to Embodiment 1.

[0053] like Figure 9 As shown, the engaging part 5 has a sliding rod 51, multiple engaging parts 52, and a pressure-receiving part 54, and is slidably disposed on the frame 3 in the left-right direction. The sliding rod 51, multiple engaging parts 52, and pressure-receiving part 54 are integrally formed from resin components or the like.

[0054] In the sliding rod 51, as Figure 8 As shown, one end of the spring 8 is installed on the frame 3, and the other end is installed on the sliding rod 51 at the sliding direction. Figure 8 The force is applied to the right. The sliding direction is the extension direction of the sliding rod 51. The extension direction of the sliding rod 51 is orthogonal to the extension direction of the elastic conductor part 4.

[0055] Multiple engaging members 52 are formed by protruding from the sliding rod 51 at intervals. The engaging members 52 are provided for each terminal portion 20. Each engaging member 52 has multiple engaging claws 53a and 53b. The engaging claws 53a and 53b have different positions and heights in the vertical direction.

[0056] exist Figure 9 In the example shown, the lower engaging pawl 53b is lower than the upper engaging pawl 53a. Hereinafter, unless engaging pawls 53a and 53b are separately distinguished, they will sometimes be referred to as engaging pawl 53. The height of engaging pawl 53 is the length of the sliding rod 51 in the extending direction. Figure 7 The left and right directions in the middle.

[0057] Card-type claw 53a Figure 9As shown, it has: an abutment surface 55a, which has a flat surface parallel to the sliding direction of the engaging portion 5 and abuts against the engaging step 26 of the circuit breaker 2; and a conical surface 56a, which is inclined relative to the extending direction of the elastic conductor portion 4. Similarly, the engaging claw 53b is as follows Figure 9 As shown, it has: an abutment surface 55b, which has a flat surface parallel to the sliding direction of the engaging portion 5 and abuts against the engaging step 26 of the circuit breaker 2; and a conical surface 56b, which is inclined relative to the extending direction of the elastic conductor portion 4.

[0058] When the terminal cover 1 is installed on the circuit breaker 2, the engaging claws 53a and 53b slide on the partition wall 24, but through the conical surfaces 56a and 56b, the terminal cover 1 can be easily moved to the engaging position with the circuit breaker 2. Furthermore, the engaging claw 53b is used to install the terminal cover 1 on other circuit breakers where the engaging step 26 is lower than that of the circuit breaker 2 described above.

[0059] The pressure-receiving portion 54 is formed by protruding from the other end of the sliding rod 51 in the opposite direction to the protrusion direction of the engaging member 52. The pressure-receiving portion 54 has a pressure-receiving surface 54a that receives pressure from the engagement release button 6, and the pressure-receiving surface 54a is a conical surface that is inclined relative to the sliding direction of the engaging member 5.

[0060] Card release button 6 Figure 10 As shown, it has an operating surface 61 and a pressing surface 62. The operating surface 61 is formed at the front end of the engagement release button 6 and protrudes from the opening formed in the frame 3 of the terminal cover 1. The operating surface 61 is pressed in by the operator when the terminal cover 1 is removed from the circuit breaker 2.

[0061] When the operating surface 61 is pressed in, the pressing surface 62 presses against the pressure surface 54a. The pressing surface 62 is a conical surface that is inclined relative to the sliding direction of the engaging part 5. One end of the spring 9 is mounted on the base of the engaging release button 6, and the other end of the spring 9 is mounted on the frame 3.

[0062] The engagement between the locking part 5 of the terminal cover 1 and the locking step 26 of the circuit breaker 2 when the terminal cover 1 is installed in the circuit breaker 2 will be described in detail below. Figure 11 It is along Figure 2 The sectional view of the XI-XI line shown. Figure 12 yes Figure 11 A magnified view of region X shown.

[0063] like Figure 11 and Figure 12 As shown, with the terminal cover 1 installed on the circuit breaker 2, the engaging claw 53a of the terminal cover 1 engages with the engaging step 26 of the circuit breaker 2. Therefore, removal of the terminal cover 1 from the circuit breaker 2 is restricted. The engagement of the engaging claw 53a and the engaging step 26 is as follows: Figure 12 As shown, the contact surface 55a of the engaging claw 53a and the contact surface 26a of the engaging step 26 abut together. Furthermore, the terminal cover 1 is removed from the circuit breaker 2 in an upward direction.

[0064] The following explains the action when the release button 6 is pressed. Figure 13 This is a perspective view showing the state in which the engagement / disengagement button of the terminal cover of the circuit breaker according to Embodiment 1 is pressed in. Figure 14 It is along Figure 13 The cross-sectional view of line XIV-XIV shown. Figure 15 This diagram illustrates the operation of the latch release button as described in Embodiment 1 when it is pressed in.

[0065] Countering the disengagement button 6 Figure 15 When the spring 9 shown is pressed in by its reaction force, as... Figure 14 and Figure 15 As shown, the pressing surface 62 of the engagement release button 6 presses against the pressure receiving surface 54a. Both the pressing surface 62 and the pressure receiving surface 54a are conical surfaces inclined relative to the sliding direction of the engaging part 5, therefore... Figure 15 As shown, the engaging part 5 moves in the direction that presses the spring 8 against the reaction force of the spring 8.

[0066] Therefore, as Figure 14 As shown, the engagement between the engaging claw 53a of the engaging portion 5 in the terminal cover 1 and the engaging step 26 of the circuit breaker 2 is released. When the engagement between the engaging claw 53a and the engaging step 26 is released, the terminal cover 1 moves in the direction of disassembling from the circuit breaker 2 due to the reaction force of the elastic conductor portion 4, and the engaging claw 53a is in a position disengaged from the engaging position with the engaging step 26. Therefore, the terminal cover 1 can be easily disassembled from the circuit breaker 2.

[0067] Furthermore, after the engagement release button 6 is released, the engagement claw 53a abuts against the partition wall 24 in the left-right direction. The height of the engagement claw 53a is greater than the height of the engagement claw 53b, so even when the engagement claw 53a is abutting against the partition wall 24 and the terminal cover 1 is being removed from the circuit breaker 2, the engagement claw 53b will not engage with the engagement step 26. Therefore, the terminal cover 1 can be removed from the circuit breaker 2 more easily. Moreover, in other circuit breakers different from the circuit breaker 2 described above, where the terminal cover 1 is not required, the engagement claw 53b may not be provided.

[0068] As described above, the terminal cover 1 of the circuit breaker 2 according to Embodiment 1 is a terminal cover of the circuit breaker 2 that has a measuring function and covers the terminal portion 20 of the circuit breaker 2. It has an elastic conductor portion 4, a measuring substrate 7, a locking portion 5, and a locking / unlocking button 6. The elastic conductor portion 4 is pressed against the terminal portion 20. The measuring substrate 7 is electrically connected to the elastic conductor portion 4. The locking portion 5 is locked against the circuit breaker 2. The locking / unlocking button 6 moves the locking portion 5 in the direction of releasing the locking between the circuit breaker 2 and the locking portion 5, and the terminal cover 1 moves relative to the circuit breaker 2 by the reaction force of the elastic conductor portion 4. Thus, even though the terminal cover 1 has a structure in which the elastic conductor portion 4 is pressed against the terminal portion 20, the locking strength between the terminal cover 1 and the circuit breaker 2 can be appropriately maintained, and it can be easily removed from the circuit breaker 2. Furthermore, the terminal cover 1 moves relative to the circuit breaker 2 due to the reaction force of the elastic conductor part 4. Therefore, even if the terminal cover 1 is installed close to the circuit breaker 2, or if there are obstacles such as pipes in the power supply direction or load direction, it can be easily removed from the circuit breaker 2.

[0069] Furthermore, the terminal cover 1 has a spring 8 that applies force to the engaging portion 5 in a direction orthogonal to the extending direction of the elastic conductor portion 4. The circuit breaker 2 has a plurality of terminal portions 20. The elastic conductor portion 4 is provided for each terminal portion 20. The engaging portion 5 has an engaging member 52 for each terminal portion 20 that engages with the circuit breaker 2. The engagement release button 6 moves the engaging portion 5 in a direction that releases the engagement between the circuit breaker 2 and the engaging member 52 for each terminal portion 20, thereby moving the terminal cover 1 relative to the circuit breaker 2 by the reaction force of the elastic conductor portion 4 for each terminal portion 20. Thus, even with a structure in which the elastic conductor portion 4 and the terminal portion 20 are pressed together, the terminal cover 1 can maintain the engagement strength between the terminal cover 1 and the circuit breaker 2 more appropriately, and can be easily removed from the circuit breaker 2.

[0070] Furthermore, the engaging member 52 has multiple engaging claws 53a and 53b with different positions and heights in the extending direction. Therefore, the terminal cover 1 can be installed on various types of circuit breakers 2 with different engaging positions. Additionally, the engaging member 52 does not use a snap-fit ​​structure, thus exhibiting excellent creep resistance.

[0071] Furthermore, the elastic conductor section 4 has a conductive spring that presses against the terminal section 20. As a result, when the engagement release button 6 is pressed, the elastic conductor section 4 can move the terminal cover 1 relative to the circuit breaker 2 with high precision by means of a reaction force.

[0072] Implementation method 2.

[0073] The difference between the terminal cover of the circuit breaker according to Embodiment 2 and the terminal cover 1 according to Embodiment 1 is that the elastic conductor portion includes a conductive spring and a conductive pin. Hereinafter, structural elements having the same function as those in Embodiment 1 will be labeled with the same reference numerals and their descriptions will be omitted; the focus will be on the differences between the terminal cover 1 and the one in Embodiment 1.

[0074] Figure 16 This is a perspective view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 2. Figure 17 This is a top view showing an example of the installation state of the terminal cover of the circuit breaker according to Embodiment 2. Figure 18 This is a perspective view showing an example of the terminal cover according to Embodiment 2. Figure 19 It is along Figure 17 The cross-sectional view of the XIX-XIX line shown.

[0075] like Figure 16 As shown, the circuit breaker 2A with terminal cover 1A installed according to Embodiment 2 is shorter in height than the circuit breaker 2 with terminal cover 1 installed according to Embodiment 1. The height of the circuit breaker 2A is the length of the terminal cover 1A in the mounting direction of the circuit breaker 2A, which is the length in the vertical direction.

[0076] like Figure 18 and Figure 19 As shown, the difference between terminal cover 1A and terminal cover 1 is that, instead of frame 3 and elastic conductor portion 4, it has frame 3A and elastic conductor portion 4A. The difference between frame 3A and frame 3 is that, instead of conductor mounting portion 33, it has conductor mounting portion 33A.

[0077] The conductor mounting portion 33A differs from the conductor mounting portion 33 in that it has a shape for mounting the elastic conductor portion 4A, instead of the shape for mounting the elastic conductor portion 4. The conductor mounting portion 33A differs from the conductor mounting portion 33 which does not have the conductive pin 42 in that it has both a conductive spring 41 and a conductive pin 42.

[0078] The conductor mounting portion 33A houses a conductive spring 41 inside, and the base end of a conductive pin 42 is mounted on the front end of the conductive spring 41 inside the conductor mounting portion 33A. Moreover, the conductive pin 42 protrudes outward from the inside of the conductor mounting portion 33A.

[0079] The base of the conductive spring 41 is electrically connected to the measuring substrate 7. When the terminal cover 1A is not installed on the circuit breaker 2A, the conductive spring 41 applies force downward to the conductive pin 42. Thus, the conductive pin 42... Figure 19As shown, with the terminal cover 1A installed on the circuit breaker 2A, it is pressed against the terminal portion 20 of the circuit breaker 2A.

[0080] Terminal cover 1A, like terminal cover 1, has a locking portion 5. This locking portion 5 has a locking member 52 for each terminal portion 20. The locking member 52 has two locking claws 53a and 53b, as shown below. Figure 19 As shown, the lower engaging claw 53b of the two engaging claws 53a and 53b engages with the engaging step 26 of the circuit breaker 2A.

[0081] Figure 20 This is a cross-sectional view showing the state in which the engagement / disengagement button of the terminal cover of the circuit breaker according to Embodiment 2 is pressed in. It is along the […]. Figure 13 The cross-sectional view of line XIV-XIV shown is equivalent to the figure. Figure 21 yes Figure 20 A magnified view of the Y region shown.

[0082] like Figure 21 As shown, the engaging claws 53a and 53b are positioned differently in the vertical direction (i.e., the extending direction) of the elastic conductor portion 4A. Furthermore, the height H1 of the engaging claw 53a is greater than the height H2 of the engaging claw 53b. Heights H1 and H2 are lengths in directions orthogonal to the extending direction of the elastic conductor portion 4A.

[0083] When the engagement / disengagement button 6 of the terminal cover 1A installed on the circuit breaker 2A is pressed in, such as Figure 20 As shown, the engagement of the locking claw 53b of the terminal cover 1A and the locking step 26 of the circuit breaker 2A is released. If the engagement of the locking claw 53b and the locking step 26 is released, the terminal cover 1A moves in the direction of disassembling from the circuit breaker 2A due to the reaction force of the elastic conductor part 4A, and the locking claw 53b is in a position disengaged from the engagement position with the locking step 26.

[0084] Therefore, even after the engagement release button 6 is released, the engagement between terminal cover 1A and circuit breaker 2A remains unengaged. This allows terminal cover 1A to be easily removed from circuit breaker 2A.

[0085] Furthermore, as described above, the height H1 of the upper engaging claw 53a is higher than the height H2 of the lower engaging claw 53b. Therefore, when the circuit breaker 2 according to Embodiment 1 is equipped with a terminal cover 1A, the lower engaging claw 53b will not hinder the removal of the terminal cover 1A from the circuit breaker 2. Figure 22 This is a partially enlarged cross-sectional view showing the case where the terminal cover according to Embodiment 2 is installed on the circuit breaker according to Embodiment 1 and then removed from the circuit breaker.

[0086] like Figure 22 As shown, the height H1 of the upper engaging claw 53a is higher than the height H2 of the lower engaging claw 53b. Therefore, during the process of removing the terminal cover 1A from the circuit breaker 2, the engaging claw 53a slides on the partition wall 24, but the engaging claw 53b is in a position away from the partition wall 24. Therefore, during the process of removing the terminal cover 1A from the circuit breaker 2, the engaging claw 53b does not engage with the engaging step 26.

[0087] On the other hand, when the height H1 of the upper engaging claw 53a is higher than the height H2 of the lower engaging claw 53b, the engaging claw 53b engages with the engaging step 26 during the process of removing the terminal cover 1A from the circuit breaker 2, making it difficult to remove the terminal cover 1A from the circuit breaker 2.

[0088] As described above, because the height H2 of the lower engaging claw 53b is higher than the height H1 of the upper engaging claw 53a, the circuit breakers 2 and 2A at different positions on the engaging step 26 can be easily disassembled and installed. The same applies to the terminal cover 1.

[0089] Furthermore, terminal covers 1 and 1A have a structure with two engaging claws 53a and 53b, but the number of engaging claws 53 can also be greater than or equal to three. In this case, with three or more engaging claws 53, the lower engaging claw 53 has a lower height. Alternatively, terminal covers 1 and 1A can also have multiple engaging claws 53 of the same height.

[0090] As described above, the elastic conductor portion 4A of the terminal cover 1A according to Embodiment 2 has a conductive spring 41 and a conductive pin 42. The conductive pin 42 is installed at the front end of the conductive spring 41 and is pressed against the terminal portion 20. Thus, the elastic conductor portion 4A of the terminal cover 1A can contact the terminal portion 20 without the conductive spring 41 being directly pressed against the terminal portion 20.

[0091] Furthermore, the engaging member 52 of the terminal cover 1, 1A according to embodiments 1 and 2 has multiple engaging claws 53a, 53b at different positions in the extending direction of the elastic conductor portions 4, 4A. Therefore, the terminal cover 1, 1A can be installed on circuit breakers 2, 2A at different heights of the engaging portion.

[0092] The closer the engagement claws 53a and 53b are to the terminal portion 20 in the extension direction of the elastic conductor portions 4 and 4A, the lower their height. The terminal covers 1 and 1A can be more appropriately disassembled from the circuit breakers 2 and 2A with different height positions of the engagement parts.

[0093] The structure shown in the above embodiments is an example, and it can also be combined with other known technologies, or the embodiments can be combined with each other, or a part of the structure can be omitted or changed without departing from the spirit.

[0094] Explanation of the label

[0095] 1. Terminal cover (1A), 2. Circuit breaker (2A), 3. Frame (3A, 23), 4. Elastic conductor (4A), 5. Engaging part, 6. Engaging release button, 7. Measuring base plate, 8. Spring (9), 20. Terminal part, 21. Screw terminal, 22. Terminal screw, 24. Partition wall (31), 25. Engaging groove, 26. Engaging step, 32. Engaging rib, 33. Conductor mounting part (33A), 33a. Mounting hole (33A), 34. Base plate storage part (34A), 41. Conductive spring (42A), 51. Sliding rod (51A), 52. Engaging part (52A), 53. Engaging claw (53A, 53B), 54. Pressing part (54A), 54a. Pressing surface (26A, 55A, 55B), 56a, 56b. Conical surface (56A, 56B), 61. Operating surface (61A), 62. Pressing surface (62A).

Claims

1. A terminal cover for a circuit breaker, having a measuring function, covers the terminal portion of the circuit breaker. The terminal cover of this circuit breaker is characterized by having: The elastic conductor portion is crimped to the terminal portion; A measuring substrate, which is electrically connected to the elastic conductor portion; The engaging part engages with the circuit breaker; The engagement release button moves the engagement part in the direction of releasing the circuit breaker from the engagement part, and the terminal cover moves relative to the circuit breaker by the reaction force of the elastic conductor part. as well as A spring applies force to the engaging portion in a direction orthogonal to the extending direction of the elastic conductor portion.

2. The terminal cover of the circuit breaker according to claim 1, characterized in that, The circuit breaker has multiple terminal portions. The elastic conductor portion is provided for each of the terminal portions. The engaging portion has an engaging member for each of the terminal portions that engages with the circuit breaker. The engagement release button moves the engagement portion in the direction of releasing the engagement between the circuit breaker and the engagement member for each of the terminals, and the terminal cover moves relative to the circuit breaker by the reaction force of the elastic conductor portion for each of the terminals.

3. The terminal cover of the circuit breaker according to claim 2, characterized in that, The engaging component has multiple engaging claws positioned differently along the extending direction.

4. The terminal cover of the circuit breaker according to claim 3, characterized in that, The engagement claws are positioned closer to the terminal in the extending direction, with a lower height for each engagement claw.

5. The terminal cover of the circuit breaker according to any one of claims 1 to 4, characterized in that, The elastic conductor portion has a conductive spring that is pressed against the terminal portion.

6. The terminal cover of the circuit breaker according to any one of claims 1 to 4, characterized in that, The elastic conductor portion has: Conductive spring; A conductive pin is installed at the front end of the conductive spring and is pressed against the terminal portion.

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