Novel clip-on ammeter

Abstract

The utility model relates to a novel clip-on ammeter. The novel clip-on ammeter comprises a machine body shell, a jaw shell, a circuit board, a current transformer and a display screen, the jaw shell comprises a jaw left upper shell, a jaw left lower shell, a jaw right upper shell and a jaw right lower shell; the current transformer comprises iron cores and windings, the iron cores comprise a left iron core and a right iron core, the left iron core is fixedly connected with the jaw left upper shell and the jaw left lower shell respectively, and the right iron core is fixedly connected with the jaw right upper shell and the jaw right lower shell respectively; the machine body upper shell is provided with a first convex pipe and a second convex pipe, and the machine body lower shell is provided with a third convex pipe and a fourth convex pipe; the jaw left upper shell is provided with a first wrench protrusion and a first through hole, the jaw left lower shell is provided with a second wrench protrusion and a second through hole, the jaw right upper shell is provided with a third through hole and a fourth through hole, and the jaw right lower shell is provided with a fifth through hole and a sixth through hole. And the jaw left shell is rotationally connected with the machine body shell. The novel clip-on ammeter is reasonable in structural design, high in strength and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of ammeters, in particular to a novel clamp-type ammeter. Background Art

[0002] A clamp-on ammeter is an instrument used to measure the current flowing in an electrical circuit. It consists of a current transformer and a circuit board, and its operating principle is based on the principle of mutual induction.

[0003] The core of a current transformer opens when a wrench is tightened, allowing the conductor carrying the current being measured to pass through the gap in the core without being cut. When the wrench is released, the core closes, completing the current measurement. Clamp-on ammeters are characterized by their ability to measure without interrupting the circuit, making them extremely convenient and widely used in electrical maintenance and repair. However, existing clamp-on ammeters suffer from poor structural design, resulting in poor structural strength and a short service life. Utility Model Content

[0004] Based on this, it is necessary to provide a new clamp ammeter to address the problem that the existing clamp ammeter structure is unreasonable in design, resulting in poor structural strength and short service life.

[0005] A novel clamp-on ammeter comprises a body shell, a jaw shell connected to the body shell, a circuit board, a current transformer, and a display screen, wherein the circuit board is electrically connected to the display screen and the current transformer, respectively; the circuit board is mounted inside the body shell, the current transformer is mounted inside the jaw shell, and the display screen is mounted on the body shell;

[0006] The jaw shell includes a left jaw shell and a right jaw shell, wherein the left jaw shell includes an upper left jaw shell and a lower left jaw shell, and the right jaw shell includes an upper right jaw shell and a lower right jaw shell;

[0007] The current transformer includes an iron core and a winding, the iron core includes a left iron core and a right iron core, the left iron core is fixedly connected to the left upper shell of the jaw and the left lower shell of the jaw, respectively, and the right iron core is fixedly connected to the right upper shell of the jaw and the right lower shell of the jaw, respectively;

[0008] The fuselage shell includes an upper shell, a lower shell, and a bottom shell. The upper shell is provided with a first convex tube and a second convex tube. The lower shell is provided with a third convex tube for sleeve-fitting the first convex tube and a fourth convex tube for sleeve-fitting the second convex tube. The inner diameter of the first convex tube is smaller than the inner diameter of the third convex tube, and the inner diameter of the second convex tube is smaller than the inner diameter of the fourth convex tube. When the upper shell and the lower shell are fixedly connected, the first convex tube is inserted into the third convex tube, and the second convex tube is inserted into the fourth convex tube.

[0009] The upper left shell of the jaw is provided with a first wrench protrusion and a first through hole for matching the third convex tube, the lower left shell of the jaw is provided with a second wrench protrusion and a second through hole for matching the third convex tube, the upper right shell of the jaw is provided with a third through hole for matching the third convex tube and a fourth through hole for matching the fourth convex tube, and the lower right shell of the jaw is provided with a fifth through hole for matching the third convex tube and a sixth through hole for matching the fourth convex tube;

[0010] The upper left shell of the jaw and the lower left shell of the jaw are respectively rotatably connected to the body shell with the third convex tube as a rotation axis.

[0011] When using the novel clamp-on ammeter, the user manually presses the first wrench protrusion on the upper left shell of the jaw and the second wrench protrusion on the lower left shell of the jaw, causing the left shell of the jaw to rotate about the third protrusion tube as the rotation axis and away from the right shell of the jaw. At the same time, because the left iron core is fixedly connected to the left shell of the jaw, the left iron core, driven by the left shell of the jaw, also rotates about the third protrusion tube as the rotation axis and away from the right iron core. At this time, the user moves the novel clamp-on ammeter and releases the first wrench protrusion and the second wrench protrusion, allowing the conductor to pass through the closed middle area of ​​the iron core, thereby measuring the current of the conductor to be measured. Because the current transformer is electrically connected to the circuit board, the circuit board can calculate the current value of the conductor to be measured based on the electrical signal detected by the current transformer and send the calculated current value of the conductor to be measured to the display screen for display.

[0012] Since the jaw shell includes a left jaw shell and a right jaw shell, the left jaw shell includes an upper left jaw shell and a lower left jaw shell, the right jaw shell includes an upper right jaw shell and a lower right jaw shell, the left iron core is fixedly connected to the upper left jaw shell and the lower left jaw shell, respectively, and the right iron core is fixedly connected to the upper right jaw shell and the lower right jaw shell, respectively, and the body shell includes an upper body shell, a lower body shell and a bottom body shell. Through the mutual connection relationship of the upper left jaw shell, the lower left jaw shell, the upper right jaw shell, the lower right jaw shell, the left iron core, the right iron core, the upper body shell, the lower body shell and the bottom body shell, the overall structure of the new clamp ammeter can maintain sufficient strength during use and is not easily damaged.

[0013] In one embodiment, the inner wall of the first convex tube and the inner wall of the second convex tube are both provided with threads;

[0014] A first mounting hole for matching the first convex tube is provided on the outer side of the lower shell of the fuselage at a position corresponding to the third convex tube, and a second mounting hole for matching the second convex tube is provided on the outer side of the lower shell of the fuselage at a position corresponding to the fourth convex tube.

[0015] The first mounting hole and the second mounting hole are used for installing fastening bolts.

[0016] In one embodiment, the left iron core is provided with a first slot, and the right iron core is provided with a second slot;

[0017] The left lower shell of the jaw is provided with a first protrusion that matches the first slot, and the right lower shell of the jaw is provided with a second protrusion that matches the second slot.

[0018] In one embodiment, the lower body shell includes a battery shell, and the battery shell is arranged in the middle of the lower body shell.

[0019] In one embodiment, the novel clamp ammeter further includes a function button, and the function button is electrically connected to the circuit board;

[0020] The function buttons and the display screen are both mounted on the upper shell of the fuselage. The upper shell of the fuselage is provided with mounting slots for matching the function buttons and the display screen.

[0021] In one embodiment, the function keys are installed below the display screen.

[0022] In one embodiment, the bottom shell of the fuselage is provided with a test lead installation hole, the test lead installation hole is used to install a test lead, and the test lead is electrically connected to the circuit board through the test lead installation hole.

[0023] In one embodiment, a clamp for fixing the test leads is provided on the outer side of the right shell of the jaw.

[0024] In one embodiment, a spacer is further provided on the outer side of the right shell of the jaw;

[0025] The pad is arranged adjacent to the clamping opening and is used to facilitate the taking and placing of the test leads.

[0026] In one embodiment, a protrusion is further provided on the outer side of the right shell of the jaw, and the protrusion is used for function indication. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the clamp ammeter of the utility model;

[0028] Figure 2 This is a schematic structural diagram of the lower left shell of the clamp in the clamp-on ammeter of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the lower right shell of the clamp mouth in the clamp-type ammeter of the utility model;

[0030] Figure 4 This is a structural diagram of the upper left shell of the clamp in the clamp-on ammeter of the utility model;

[0031] Figure 5This is a structural diagram of the upper right shell of the clamp in the clamp-on ammeter of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the inner shell of the clamp-on ammeter of the utility model;

[0033] Figure 7 This is a schematic diagram of the structure of the iron core in the clamp-type ammeter of the present utility model;

[0034] Figure 8 This is a schematic diagram of the partial structure of the clamp ammeter of the utility model;

[0035] Figure 9 This is another overall structural diagram of the clamp ammeter of the utility model;

[0036] Figure 10 This is a schematic diagram of the structure of the lower shell of the clamp-on ammeter of the present invention;

[0037] Figure 11 This is another structural diagram of the lower shell of the clamp-on ammeter of the present invention;

[0038] Among them, 10 is the fuselage shell, 20 is the jaw shell, 30 is the current transformer, 40 is the display screen, 50 is the function button, 11 is the upper shell of the fuselage, 111 is the first convex tube, 112 is the second convex tube, 113 is the mounting slot, 12 is the lower shell of the fuselage, 121 is the third convex tube, 122 is the fourth convex tube, 123 is the first mounting hole, 124 is the second mounting hole, 125 is the battery shell, 13 is the bottom shell of the fuselage, 131 is the test lead mounting hole, 21 is the left shell of the jaw, 211 is the upper left shell of the jaw, 2111 is the first wrench protrusion, 2112 is the first through hole, 212 is the lower left shell of the jaw, 2121 is the second wrench protrusion 2122 is the second through hole, 2123 is the first protrusion, 22 is the right shell of the jaw, 221 is the upper right shell of the jaw, 2211 is the third through hole, 2212 is the fourth through hole, 2213 is the first clamping part, 2214 is the first pad part, 2215 is the first protrusion part, 222 is the lower right shell of the jaw, 2221 is the fifth through hole, 2222 is the sixth through hole, 2223 is the second protrusion, 2224 is the second clamping part, 2225 is the second pad part, 2226 is the second protrusion part, 31 is the iron core, 311 is the left iron core, 3111 is the first slot, 312 is the right iron core, and 3121 is the second slot. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only."

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] The utility model discloses a novel clamp-type ammeter.

[0043] like Figures 1 to 11As shown, the new clamp ammeter includes a body shell 10, a jaw shell 20 connected to the body shell 10, a circuit board (not shown), a current transformer 30 and a display screen 40. The circuit board is electrically connected to the display screen 40 and the current transformer 30 respectively. The circuit board is installed inside the body shell 10, the current transformer 30 is installed inside the jaw shell 20, and the display screen 40 is installed on the body shell 10; the jaw shell 20 includes a left jaw shell 21 and a right jaw shell 22. The left jaw shell 21 includes a left upper jaw shell 211 and a left lower jaw shell 212. The right jaw shell 22 includes The upper right shell 221 of the jaw and the lower right shell 222 of the jaw; the current transformer 30 includes an iron core 31 and a winding (not shown), the iron core 31 includes a left iron core 311 and a right iron core 312, the left iron core 311 is fixedly connected to the upper left shell 211 of the jaw and the lower left shell 212 of the jaw, and the right iron core 312 is fixedly connected to the upper right shell 221 of the jaw and the lower right shell 222 of the jaw; the fuselage shell 10 includes an upper upper shell 11, a lower shell 12 and a bottom shell 13 of the fuselage, the upper upper shell 11 is provided with a first convex tube 111 and a second convex tube 112, and the lower shell 12 is provided with a The third protruding tube 121 is used to sleeve the first protruding tube 111, and the fourth protruding tube 122 is used to sleeve the second protruding tube 112. The inner diameter of the first protruding tube 111 is smaller than the inner diameter of the third protruding tube 121, and the inner diameter of the second protruding tube 112 is smaller than the inner diameter of the fourth protruding tube 122. When the upper shell 11 and the lower shell 12 of the fuselage are fixedly connected, the first protruding tube 111 is inserted into the third protruding tube 121, and the second protruding tube 112 is inserted into the fourth protruding tube 122. The left upper shell 211 of the jaws is provided with a first wrench protrusion 2111 and a first through hole 2112 for matching the third protruding tube 121. The jaws are provided with a first wrench protrusion 2111 and a first through hole 2112 for matching the third protruding tube 121. The lower left shell 212 of the jaw is provided with a second wrench protrusion 2121 and a second through hole 2122 for cooperating with the third protruding tube 121. The upper right shell 221 of the jaw is provided with a third through hole 2211 for cooperating with the third protruding tube 121 and a fourth through hole 2212 for cooperating with the fourth protruding tube 122. The lower right shell 222 of the jaw is provided with a fifth through hole 2221 for cooperating with the third protruding tube 121 and a sixth through hole 2222 for cooperating with the fourth protruding tube 122. The upper left shell 211 of the jaw and the lower left shell 212 of the jaw are respectively rotatably connected to the body shell 10 with the third protruding tube 121 as the rotation axis.

[0044] When the above-mentioned new clamp ammeter is in use, the user presses the first wrench protrusion 2111 of the upper left shell 211 of the jaw and the second wrench protrusion 2121 of the lower left shell 212 of the jaw by hand, so that the left shell 21 of the jaw can be rotated with the third protrusion 121 as the rotation axis and away from the right shell 22 of the jaw; at the same time, since the left iron core 311 is fixedly connected to the left shell 21 of the jaw, the left iron core 311 is also driven by the left shell 21 of the jaw to rotate with the third protrusion 121 as the rotation axis and away from the right iron core 312. At this time, the user moves the new clamp ammeter and releases the first wrench protrusion 2111 and the second wrench protrusion 2121, so that the wire to be measured can pass through the middle closed area of ​​the iron core 31, so that the current of the wire to be measured can be measured. Since the current transformer 30 is electrically connected to the circuit board, the circuit board can calculate the current value of the conductor to be measured according to the electrical signal detected by the current transformer 30 , and send the calculated current value of the conductor to be measured to the display screen 40 for display.

[0045] Since the jaw shell 20 includes a jaw left shell 21 and a jaw right shell 22, the jaw left shell 21 includes a jaw left upper shell 211 and a jaw left lower shell 212, the jaw right shell 22 includes a jaw right upper shell 221 and a jaw right lower shell 222, the left iron core 311 is fixedly connected to the jaw left upper shell 211 and the jaw left lower shell 212 respectively, and the right iron core 312 is fixedly connected to the jaw right upper shell 221 and the jaw right lower shell 222 respectively. The novel clamp ammeter comprises an upper housing 11, a lower housing 12, and a bottom housing 13. The interconnected relationships among the left upper housing 211, the left lower housing 212, the right upper housing 221, the right lower housing 222, the left iron core 311, the right iron core 312, the upper housing 11, the lower housing 12, and the bottom housing 13 ensure that the overall structure of the novel clamp ammeter maintains sufficient strength during use and is not easily damaged.

[0046] The inner walls of the first and second protruding tubes 111 and 112 are both threaded. A first mounting hole 123 is provided on the outer side of the lower fuselage shell 12, corresponding to the third protruding tube 121, for mate with the first protruding tube 111. A second mounting hole 124 is provided on the outer side of the lower fuselage shell 12, corresponding to the fourth protruding tube 122, for mate with the second protruding tube 112. The first and second mounting holes 123 and 124 are used to install fastening bolts (not shown). When assembling the upper fuselage shell 11 and the lower fuselage shell 12, the first protruding tube 111 is first inserted into the third protruding tube 121, and the second protruding tube 112 is inserted into the fourth protruding tube 122. Fastening bolts are then installed in the first and second mounting holes 123 and 124, respectively, to securely fasten the upper fuselage shell 11 and the lower fuselage shell 12 together.

[0047] The left iron core 311 is provided with a first slot 3111 , and the right iron core 312 is provided with a second slot 3121 ;

[0048] The lower left jaw shell 212 is provided with a first protrusion 2123 that engages with the first slot 3111, and the lower right jaw shell 222 is provided with a second protrusion 2223 that engages with the second slot 3121. The first protrusion 2123 allows the left iron core 311 to rotate synchronously with the left jaw shell 21, while the second protrusion 2223 allows the right iron core 312 to remain stationary.

[0049] The lower housing 12 includes a battery housing 125, which is located in the middle of the lower housing 12. The battery housing 125 is located in the middle of the lower housing 12 to facilitate battery replacement.

[0050] The novel clamp ammeter also includes a function button 50, which is electrically connected to the circuit board. The function button 50 and the display screen 40 are both mounted on the upper housing 11. The upper housing 11 has mounting slots 113 for the function button 50 and the display screen 40. The provision of the mounting slots 113 facilitates the installation of the function button 50 and the display screen 40.

[0051] The installation positions of the display screen 40 and the function buttons 50 can be set according to actual needs. Preferably, the function buttons 50 are installed below the display screen 40.

[0052] The bottom housing 13 is provided with a test lead mounting hole 131 for mounting a test lead (not shown). The test lead is electrically connected to the circuit board through the test lead mounting hole 131. Installing the test lead through the test lead mounting hole 131 allows the new clamp ammeter to perform auxiliary measurements using the test lead, thereby expanding the functional range of the new clamp ammeter.

[0053] The right side of the jaw 22 is equipped with a clamp for securing the test leads. Furthermore, the clamp includes a first clamp portion 2213 located on the upper right side of the jaw 221 and a second clamp portion 2224 located on the lower right side of the jaw 222. The interaction between the first clamp portion 2213 and the second clamp portion 2224 allows the new clamp ammeter to hold the test leads.

[0054] A pad is also provided on the outside of the right jaw shell 22, adjacent to the jaws, to facilitate the removal of test leads. Furthermore, the pad includes a first pad portion 2214 located on the upper right jaw shell 221 and a second pad portion 2225 located on the lower right jaw shell 222. The interaction between the first pad portion 2214 and the second pad portion 2225 facilitates the installation and removal of test leads.

[0055] The right jaw shell 22 also features a bump on its exterior, which is used to indicate function. Furthermore, the bump includes a first bump portion 2215 located on the upper right jaw shell 221 and a second bump portion 2226 located on the lower right jaw shell 222. The interaction between the first bump portion 2215 and the second bump portion 2226 allows the new clamp ammeter to better indicate function, thereby enhancing the user experience.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A new clamp ammeter, characterized in that: The device comprises a body shell, a jaw shell connected to the body shell, a circuit board, a current transformer, and a display screen, wherein the circuit board is electrically connected to the display screen and the current transformer, respectively, the circuit board is mounted inside the body shell, the current transformer is mounted inside the jaw shell, and the display screen is mounted on the body shell; The jaw shell includes a left jaw shell and a right jaw shell, wherein the left jaw shell includes an upper left jaw shell and a lower left jaw shell, and the right jaw shell includes an upper right jaw shell and a lower right jaw shell; The current transformer includes an iron core and a winding, the iron core includes a left iron core and a right iron core, the left iron core is fixedly connected to the left upper shell of the jaw and the left lower shell of the jaw, respectively, and the right iron core is fixedly connected to the right upper shell of the jaw and the right lower shell of the jaw, respectively; The fuselage shell includes an upper shell, a lower shell, and a bottom shell. The upper shell is provided with a first convex tube and a second convex tube. The lower shell is provided with a third convex tube for sleeve-fitting the first convex tube and a fourth convex tube for sleeve-fitting the second convex tube. The inner diameter of the first convex tube is smaller than the inner diameter of the third convex tube, and the inner diameter of the second convex tube is smaller than the inner diameter of the fourth convex tube. When the upper shell and the lower shell are fixedly connected, the first convex tube is inserted into the third convex tube, and the second convex tube is inserted into the fourth convex tube. The upper left shell of the jaw is provided with a first wrench protrusion and a first through hole for matching the third convex tube, the lower left shell of the jaw is provided with a second wrench protrusion and a second through hole for matching the third convex tube, the upper right shell of the jaw is provided with a third through hole for matching the third convex tube and a fourth through hole for matching the fourth convex tube, and the lower right shell of the jaw is provided with a fifth through hole for matching the third convex tube and a sixth through hole for matching the fourth convex tube; The upper left shell of the jaw and the lower left shell of the jaw are respectively rotatably connected to the body shell with the third convex tube as a rotation axis.

2. The novel clamp ammeter according to claim 1, characterized in that: The inner wall of the first convex tube and the inner wall of the second convex tube are both provided with threads; A first mounting hole for matching the first convex tube is provided on the outer side of the lower shell of the fuselage at a position corresponding to the third convex tube, and a second mounting hole for matching the second convex tube is provided on the outer side of the lower shell of the fuselage at a position corresponding to the fourth convex tube. The first mounting hole and the second mounting hole are used for installing fastening bolts.

3. The novel clamp ammeter according to claim 2, characterized in that: The left iron core is provided with a first slot, and the right iron core is provided with a second slot; The left lower shell of the jaw is provided with a first protrusion that matches the first slot, and the right lower shell of the jaw is provided with a second protrusion that matches the second slot.

4. The novel clamp ammeter according to claim 3, characterized in that: The lower body shell includes a battery shell, and the battery shell is arranged in the middle of the lower body shell.

5. The novel clamp ammeter according to claim 4, characterized in that: Also included are function buttons, wherein the function buttons are electrically connected to the circuit board; The function buttons and the display screen are both mounted on the upper shell of the fuselage. The upper shell of the fuselage is provided with mounting slots for matching the function buttons and the display screen.

6. The novel clamp ammeter according to claim 5, characterized in that: The function buttons are installed below the display screen.

7. The novel clamp ammeter according to any one of claims 1 to 6, characterized in that: The bottom shell of the fuselage is provided with a test lead installation hole, and the test lead installation hole is used to install a test lead, and the test lead is electrically connected to the circuit board through the test lead installation hole.

8. The novel clamp ammeter according to claim 7, characterized in that: A clamp for fixing the test leads is provided on the outer side of the right shell of the jaw.

9. The novel clamp ammeter according to claim 8, characterized in that: A pad is also provided on the outside of the right shell of the jaw; The pad is arranged adjacent to the clamping opening and is used to facilitate the taking and placing of the test leads.

10. The novel clamp ammeter according to claim 9, characterized in that: A convex block is also provided on the outside of the right shell of the jaw, and the convex block is used for function indication.

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