Molded case measuring switch

Abstract

The utility model relates to the technical field of molded case measurement switches, and discloses a molded case measurement switch, which comprises a measurement switch body, a frame arranged on the front side of the measurement switch body and an opening and closing handle, the opening and closing handle is arranged in the frame, and transmission cavities are arranged in the upper end and the lower end of the frame. The inner walls of the two transmission cavities are connected with reset assemblies, the other ends of the two reset assemblies are connected with rack plates capable of being pressed by the opening and closing handle, the inner walls of the two transmission cavities are connected with amplification display assemblies, and the other ends of the two amplification display assemblies penetrate out of the frame. And the two amplification display assemblies are respectively connected with the two rack plates. According to the molded case measurement switch, when the opening and closing handle is used for opening and closing, the rack plate can be pressed through the opening and closing handle, and the rotation of the amplification display assembly can be controlled through the movement of the rack plate, so that a maintainer can conveniently know whether the opening and closing handle is bent or not.

Description

Technical Field

[0001] This utility model relates to the field of plastic housing measurement switch technology, specifically a plastic housing measurement switch. Background Technology

[0002] Molded case measuring switches are electrical devices that combine the functions of molded case circuit breakers and measuring devices. They are mainly used in power distribution systems, providing both circuit protection and power parameter monitoring. These switches are widely used in industrial and building electrical systems to protect circuits from overloads and short circuits, and can also be used for connecting and disconnecting lines.

[0003] The patent with publication number CN216288280U discloses a plastic-cased measuring switch, which includes a housing. A controller module is snapped onto one side of the housing. The controller module is equipped with a communication module for realizing the data transmission function of the plastic-cased measuring switch. The housing contains a thermomagnetic tripping mechanism and an electronic tripping mechanism. The thermomagnetic tripping mechanism includes a heating element, an armature, an armature bracket, and a bimetallic strip. The electronic tripping mechanism includes an input terminal, a current transformer, a coil, and an electronic trip unit. The controller module is assembled on the housing by snapping. The communication module is equipped with a communication module to realize the remote communication function of the plastic-cased measuring switch. The housing contains both a thermomagnetic tripping mechanism and an electronic tripping mechanism. When the controller module is removed, the plastic-cased measuring switch still has a tripping effect, making it more adaptable.

[0004] However, the aforementioned molded housing measuring switch still has the following problems in actual use:

[0005] Molded case measuring switches are equipped with opening and closing handles, a crucial component used for manually controlling the circuit breaker to connect (close) and disconnect (open) the circuit. Most of these handles on the market are made of plastic, and after frequent operation and prolonged use, they are prone to bending or even cracking. However, because the opening and closing handles are usually designed to be short, such damage is often difficult to detect in time. By the time the problem is noticed, the handle may have already broken, affecting subsequent opening and closing operations. This delayed detection not only hinders the normal operation of the equipment but may also pose a potential threat to the safety and reliability of the system. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a plastic-cased measuring switch that can monitor the bending degree of the opening and closing handles during the opening and closing process, thereby enabling early detection and maintenance to avoid uncontrollable losses caused by sudden breakage.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a plastic-cased measuring switch, comprising a measuring switch body, a frame installed on the front side of the measuring switch body, and a switch handle. The switch handle is located inside the frame. Transmission cavities are provided inside both the upper and lower ends of the frame. Reset components are connected to the inner walls of both transmission cavities. The other ends of both reset components are connected to rack plates that can be pressed by the switch handle. Magnifying display components are connected to the inner walls of both transmission cavities. The other ends of both magnifying display components extend to the outside of the frame, and the two magnifying display components are respectively connected to the two rack plates.

[0008] Furthermore, a reset port is provided on the inner wall of the transmission cavity near the measuring switch body, and the end of the reset assembly away from the rack plate is located inside the reset port.

[0009] Furthermore, the reset assembly includes an anti-disengagement rod and a spring. The inner wall of one end of the rack plate inside the transmission cavity has an anti-disengagement opening. The outer wall of one end of the anti-disengagement rod is slidably connected to the inner wall of the anti-disengagement opening. The other end of the anti-disengagement rod extends through to the outside of the rack plate and is fixedly connected to the inner wall of the reset opening. The two ends of the spring are fixedly connected to the reset opening and the side wall of the rack plate, respectively.

[0010] Furthermore, the magnifying display component includes a rotating rod, a second gear, and a magnifying mechanism. The two ends of the rotating rod are rotatably connected to the two sides of the inner wall of the transmission cavity, respectively. The second gear is sleeved and fixedly connected to the outer wall of the upper end of the rotating rod, and the second gear meshes with the rack plate. One end of the magnifying mechanism is connected to the lower end of the rotating rod, and the other end of the magnifying mechanism extends through to the outside of the frame.

[0011] Furthermore, the amplification mechanism includes a first gear, a third gear, and a rotating assembly. The first gear is sleeved and fixedly connected to the outer wall of the lower end of the rotating rod. The third gear is connected to one end of the rotating assembly, and the other end of the rotating assembly extends through to the outside of the frame. The first gear and the third gear mesh.

[0012] Furthermore, the rotating assembly includes an extension rod and an indicator arrow. The outer wall of one end of the extension rod is fixedly connected to the inner wall of the No. 3 gear, and the other end of the extension rod extends through to the outside of the frame and is fixedly connected to one end of the indicator arrow.

[0013] Furthermore, a set of scale lines is provided on the same side at both ends of the frame, and the ends of the two indicator arrows away from the extension rod point to the two sets of scale lines respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This type of plastic-cased measuring switch has a rack plate, a reset component, and a magnifying display component installed inside both the upper and lower ends of the frame of the measuring switch body. When the opening and closing handle is used to open or close the circuit, the rack plate can be pressed by the opening and closing handle. The movement of the rack plate controls the rotation of the magnifying display component, which makes it convenient for maintenance personnel to know whether the opening and closing handle has been bent. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the measuring switch body and frame of this utility model;

[0018] Figure 3 This is a detailed connection diagram of the measuring switch body, opening and closing handle, and frame of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 These are two perspective views of the rack plate, reset assembly, and magnified display assembly of this utility model.

[0021] Figure 6 This is an exploded view of the structure of the rack plate, reset assembly, and magnified display assembly of this utility model;

[0022] Figure 7 This is an exploded view of the rack plate and reset assembly of this utility model.

[0023] In the diagram: 1. Measuring switch body; 2. Frame; 3. Opening / closing handle; 4. Indicating arrow; 5. Gear No. 1; 6. Rack plate; 7. Anti-disengagement rod; 8. Spring; 9. Rotating rod; 10. Gear No. 2; 11. Extension rod; 12. Gear No. 3; 201. Scale line; 202. Transmission cavity; 203. Reset port; 601. Anti-disengagement port. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-7A plastic-cased measuring switch includes a measuring switch body 1, a frame 2 installed on the front side of the measuring switch body 1, and a switch handle 3. The switch handle 3 is located inside the frame 2. The frame 2 has transmission cavities 202 at both the upper and lower ends. The inner walls of the two transmission cavities 202 are connected to reset components. The other ends of the two reset components are connected to rack plates 6 that can be pressed by the switch handle 3. The inner walls of the two transmission cavities 202 are connected to magnifying display components. The other ends of the two magnifying display components extend to the outside of the frame 2, and the two magnifying display components are respectively connected to the two rack plates 6.

[0026] The plastic-cased measuring switch in this utility model is structurally similar to existing plastic-cased measuring switches, such as the plastic-cased measuring switch disclosed in patent publication number CN216288280U. Figures 1 to 7 As shown, when using the plastic-cased measuring switch of this utility model, maintenance personnel need to manually push the opening and closing handle 3 to open and close the circuit. At the same time as pushing the opening and closing handle 3, due to inertia, the opening and closing handle 3 will instantly hit the end of the frame 2. At the same time as the opening and closing handle 3 hits the frame 2, it will push the rack plate 6, which was pushed out of the frame 2 by the action of the reset component, back into the transmission cavity 202. At the moment the rack plate 6 is pushed back, it will cause the magnifying display component to rotate. At this time, the maintenance personnel can timely know the push-back distance of the rack plate 6 by the rotation of the magnifying display component at the end outside the frame 2. Thus, based on the initial value, it can be determined whether the rack plate 6 has bent (for example, the initial value is that when the opening and closing handle 3 is in the normal state, the magnifying display component should point to point X when the rack plate 6 is pushed back, but now the magnifying display component points to point Y, which means that the moving distance of the rack plate 6 has changed, indicating that the opening and closing handle 3 pressing the rack plate 6 has bent).

[0027] In a preferred embodiment of this utility model, a reset port 203 is provided on the inner wall of the transmission cavity 202 near the measuring switch body 1, and the end of the reset assembly away from the rack plate 6 is located inside the reset port 203. The reset assembly includes an anti-disengagement rod 7 and a spring 8. An anti-disengagement opening 601 is provided on the inner wall of the rack plate 6 located inside the transmission cavity 202. The outer wall of one end of the anti-disengagement rod 7 is slidably connected to the inner wall of the anti-disengagement opening 601, and the other end of the anti-disengagement rod 7 extends through to the outside of the rack plate 6 and is fixedly connected to the inner wall of the reset port 203. The two ends of the spring 8 are fixedly connected to the reset port 203 and the side wall of the rack plate 6, respectively.

[0028] More specifically, when the opening / closing handle 3 is not pressing the rack plate 6, the rack plate 6 will protrude outside the frame 2 under the action of the spring 8. When the opening / closing handle 3 presses the rack plate 6, the rack plate 6 will press down instantly and compress the spring 8, which will cause the rack plate 6 to retract into the transmission cavity 202. When the opening / closing handle 3 is turned again, the rack plate 6 will be pushed out of the frame 2 by the spring 8 because there is no pressing force.

[0029] In addition, by setting the anti-disengagement rod 7 and the anti-disengagement port 601, the rack plate 6 can be prevented from falling out of the transmission cavity 202 under the reset of the spring 8 or under the pull of external force.

[0030] In a preferred embodiment of this utility model, the magnifying display assembly includes a rotating rod 9, a second gear 10, and a magnifying mechanism. Both ends of the rotating rod 9 are rotatably connected to the two sides of the inner wall of the transmission cavity 202. The second gear 10 is sleeved and fixedly connected to the outer wall of the upper end of the rotating rod 9, and meshes with the rack plate 6. One end of the magnifying mechanism is connected to the lower end of the rotating rod 9, and the other end of the magnifying mechanism extends through to the outside of the frame 2. The magnifying mechanism includes a first gear 5, a third gear 12, and a rotating assembly. The first gear 5 is sleeved and fixedly connected to the outer wall of the lower end of the rotating rod 9. The third gear 12 is connected to one end of the rotating assembly, and the other end of the rotating assembly extends through to the outside of the frame 2. The first gear 5 and the third gear 12 mesh. The rotating assembly includes an extension rod 11 and an indicator arrow 4. The outer wall of one end of the extension rod 11 is fixedly connected to the inner wall of the third gear 12, and the other end of the extension rod 11 extends through to the outside of the frame 2 and is fixedly connected to one end of the indicator arrow 4. A set of scale lines 201 is provided on the same side at both ends of the frame 2, and the ends of the two indicator arrows 4 away from the extension rod 11 point to the two sets of scale lines 201 respectively.

[0031] More specifically, when the rack plate 6 is retracted into the transmission cavity 202 by the pressure of the opening and closing handle 3, the movement of the rack plate 6 will cause the connected second gear 10 to rotate. After the second gear 10 rotates, it can drive the first gear 5 to rotate through the same rotating rod 9. Then the first gear 5 can drive the third gear 12 to rotate. The rotation of the third gear 12 can drive the indicator arrow 4 to rotate through the extension rod 11. At this time, the maintenance personnel only need to read the value according to the scale line 201 pointed to by the indicator arrow 4 to determine whether it is at the initial value, which is convenient and quick.

[0032] It is important to note that the number of teeth on gear 10 (number 2) is much smaller than that on gear 5 (number 1). Similarly, the number of teeth on gear 12 (number 3) is not greater than that on gear 10 (number 2). This allows the rack plate 6 to move a short distance (e.g., two teeth) when pressed by the lever 3. At this time, gear 10 (number 2) will also rotate by two teeth (50°). Gear 5 (number 1), connected to the same lever 9, will also rotate by 50°. However, 50° is equivalent to rotating six teeth. This means that gear 12 (number 3), meshed with gear 5, will also rotate six teeth. Since the number of teeth on gear 12 (number 3) is not greater than that on gear 10 (number 2), when gear 5 rotates six teeth, gear 12 (number 3) will rotate at least half a turn. This allows for a larger rotation angle indicated by the arrow 4, making it easier for maintenance personnel to visually understand the rotation.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic-cased measuring switch, comprising a measuring switch body (1), a frame (2) mounted on the front side of the measuring switch body (1), and a switch handle (3), wherein the switch handle (3) is located inside the frame (2), characterized in that: The frame (2) has a transmission cavity (202) inside both the upper and lower ends. The inner walls of the two transmission cavities (202) are connected to a reset component. The other end of the two reset components is connected to a rack plate (6) that can be pressed by the opening and closing handle (3). The inner walls of the two transmission cavities (202) are connected to a magnifying display component. The other end of the two magnifying display components extends to the outside of the frame (2), and the two magnifying display components are respectively connected to the two rack plates (6).

2. The plastic-cased measuring switch according to claim 1, characterized in that: The inner wall of the transmission cavity (202) near the measuring switch body (1) has a reset port (203), and the end of the reset component away from the rack plate (6) is located in the reset port (203).

3. A plastic-cased measuring switch according to claim 2, characterized in that: The reset assembly includes an anti-disengagement rod (7) and a spring (8). The rack plate (6) has an anti-disengagement opening (601) on the inner wall of one end inside the transmission cavity (202). The outer wall of one end of the anti-disengagement rod (7) is slidably connected to the inner wall of the anti-disengagement opening (601). The other end of the anti-disengagement rod (7) extends through to the outside of the rack plate (6) and is fixedly connected to the inner wall of the reset opening (203). The two ends of the spring (8) are fixedly connected to the reset opening (203) and the side wall of the rack plate (6), respectively.

4. A plastic-cased measuring switch according to claim 1, characterized in that: The magnifying display assembly includes a rotating rod (9), a second gear (10), and a magnifying mechanism. The two ends of the rotating rod (9) are rotatably connected to the two sides of the inner wall of the transmission cavity (202). The second gear (10) is sleeved and fixedly connected to the outer wall of the upper end of the rotating rod (9), and the second gear (10) meshes with the rack plate (6). One end of the magnifying mechanism is connected to the lower end of the rotating rod (9), and the other end of the magnifying mechanism extends through to the outside of the frame (2).

5. A plastic-cased measuring switch according to claim 4, characterized in that: The amplification mechanism includes a first gear (5), a third gear (12) and a rotating assembly. The first gear (5) is sleeved and fixedly connected to the outer wall of the lower end of the rotating rod (9). The third gear (12) is connected to one end of the rotating assembly. The other end of the rotating assembly extends through to the outside of the frame (2). The first gear (5) and the third gear (12) mesh.

6. A plastic-cased measuring switch according to claim 5, characterized in that: The rotating assembly includes an extension rod (11) and an indicator arrow (4). The outer wall of one end of the extension rod (11) is fixedly connected to the inner wall of the No. 3 gear (12), and the other end of the extension rod (11) extends through to the outside of the frame (2) and is fixedly connected to one end of the indicator arrow (4).

7. A plastic-cased measuring switch according to claim 6, characterized in that: A set of scale lines (201) is provided on the same side at both ends of the frame (2), and the ends of the two indicator arrows (4) away from the extension rod (11) point to the two sets of scale lines (201) respectively.

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