Resistance measuring instrument

Abstract

The invention belongs to the technical field of resistance measuring equipment, and discloses a resistance measuring instrument which comprises a shell, a measuring module and a calibration assembly. The measuring module is located in the shell, two binding posts are arranged on the surface of the shell at intervals, and the binding posts are connected to the positive electrode and the negative electrode of the measuring module in a one-to-one correspondence mode. The calibration assembly comprises a calibration resistor with known resistance and two connecting pieces, the calibration resistor is detachably connected to the shell, and one ends of the two connecting pieces are rotationally arranged on the binding posts in a sleeving mode in a one-to-one correspondence mode. Before the resistance value of a to-be-measured resistor is measured, connecting pieces corresponding to the two binding posts are rotated around the two binding posts respectively, so that the two connecting pieces are in lap joint with the input end and the output end of the calibration resistor respectively, the measurement module measures the resistance value of the calibration resistor, and the measurement value of the measurement module is compared with the real resistance value to confirm the measurement precision of the measurement module. The operation process is simple and convenient, and the precision of the measurement module can be detected without external connection with other detection equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance measuring equipment, and in particular to a resistance measuring instrument. Background Art

[0002] When the resistance tester is working, two wires are usually plugged into the two interfaces on the top of the tester, and then the other end of the wire is connected to the resistance to be tested for testing.

[0003] In the prior art, when resistance measuring instruments detect abnormal resistance data during the test process, they usually determine that there is a problem with the resistance to be measured. This test method cannot determine whether there is a measurement error in the resistance tester itself, and cannot review its own measurement results, which affects the measurement results. If it is necessary to calibrate its own accuracy, it is necessary to use external calibration equipment, and the operation process is complicated. Summary of the invention

[0004] The object of the present invention is to provide a resistance measuring instrument capable of calibrating its own measurement results.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A resistance measuring instrument, characterized in that it comprises:

[0007] shell;

[0008] A measuring module is located inside the housing, and is configured to measure the resistance of a resistor. Two binding posts are arranged on the surface of the housing at intervals, and the binding posts are connected to the positive and negative electrodes of the measuring module in a one-to-one correspondence;

[0009] The calibration component comprises a calibration resistor with a known resistance value and two connecting parts, wherein the calibration resistor is connected to the housing, one end of the two connecting parts is rotatably sleeved on the terminal posts one by one, and the other end can be lapped on the input end and the output end of the calibration resistor one by one.

[0010] Preferably, the outer shell includes a protective plate having a connecting hole thereon, a protective groove thereon, the terminal is arranged in the protective groove, the protective plate can be slidably arranged at the opening of the protective groove, and the connecting hole can be connected to the opening of the protective groove.

[0011] Preferably, it further comprises a display screen, a receiving groove is provided on the housing, the display screen is detachably arranged in the receiving groove, and the display screen is signal-connected to the measuring module.

[0012] Preferably, the housing further comprises a first elastic member, one end of the first elastic member is connected to the inner wall of the protection groove, and the other end is connected to the guard plate, the protection groove is connected to the accommodating groove, the guard plate is provided with a pressing portion, and a first locking groove is provided on the frame of the display screen, and the opening direction of the first locking groove is consistent with the direction of the display screen;

[0013] The display screen has a closed state facing the bottom of the accommodating groove and an open state facing away from the bottom of the accommodating groove. In the closed state, the pressing portion presses against the frame of the display screen. In the open state, the pressing portion extends into the first locking groove and presses against the bottom of the first locking groove under the elastic restoring force of the first elastic member.

[0014] Preferably, a plurality of first elastic members are arranged at intervals along the length direction of the guard plate.

[0015] Preferably, a connecting channel is provided on the shell, one end of the connecting channel is connected to the protection groove, and the other end is connected to the accommodating groove, and a locking portion is protruding on the frame of the display screen, and the locking portion can extend into the connecting channel and fit against the inner wall of the connecting channel, and the first locking groove is arranged on the locking portion.

[0016] Preferably, a plurality of locking portions are arranged at intervals along the length direction of the display screen, and each of the locking portions is configured with one connecting channel and one pressing portion.

[0017] Preferably, a switch assembly is further included, wherein the switch assembly comprises:

[0018] A locking block, wherein a second locking groove is formed on the inner wall of the accommodating groove, and the locking block is slidably disposed in the second locking groove;

[0019] A second elastic member, one end of which is connected to the bottom of the second locking groove, and the other end of which is connected to the locking block. A power connection groove is provided on the frame of the display screen. When the display screen is located in the accommodating groove, the power connection groove is connected to the second locking groove. An operating hole connected to the second locking groove is provided on the housing;

[0020] An operating rod is convexly arranged on the locking block and extends into the operating hole. The operating rod is configured to drive the operating rod to slide along the depth direction of the second locking groove.

[0021] Preferably, a first power contact piece is fixedly provided in the power connection slot, a second power contact piece is fixedly provided on the locking block, the second power contact piece is electrically connected to the measuring module, and the locking block can drive the second power contact piece to press against the first power contact piece.

[0022] Preferably, a handle is also provided on the shell.

[0023] Beneficial effects of the present invention:

[0024] The measuring module cooperates with the calibration component. Before formally measuring the resistance value of the resistor to be measured, the corresponding connectors are rotated around the two terminals respectively so that the two connectors are respectively connected to the input and output ends of the calibration resistor. The measuring module measures the resistance value of the calibration resistor. Since the actual resistance value of the calibration resistor is known, the measured value of the measuring module is compared with the actual resistance value to confirm the measurement accuracy of the measuring module. The operation process is simple and convenient, and the accuracy of the measuring module can be completed without the need for external other testing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the resistance measuring instrument of the present invention;

[0026] Figure 2 It is a structural cross-sectional view of one direction of the resistance measuring instrument of the present invention;

[0027] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 It is a cross-sectional view of a position structure of the resistance measuring instrument of the present invention with some structures omitted;

[0029] Figure 5 It is a structural cross-sectional view of another orientation of the resistance measuring instrument of the present invention with part of the structure omitted;

[0030] Figure 6 It is a structural explosion diagram of the resistance measuring instrument of the present invention when the display screen is in a closed state;

[0031] Figure 7 It is a structural explosion diagram of the resistance measuring instrument of the present invention when the display screen is in an on state.

[0032] In the figure:

[0033] 1. housing; 10. protection groove; 11. terminal; 12. guard plate; 121. connection hole; 122. pressing portion; 13. receiving groove; 131. second locking groove; 14. first elastic member; 15. connection channel; 16. operation hole; 17. handle;

[0034] 2. Calibration components; 21. Calibration resistors; 22. Connectors;

[0035] 3. Display screen; 31. First locking slot; 32. Locking portion; 33. Power connection slot; 331. First power connection sheet;

[0036] 4. Switch assembly; 41. Locking block; 411. Second power contact piece; 42. Second elastic member; 43. Operating rod. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] like Figure 1-Figure 7 As shown, the present invention provides a resistance measuring instrument for measuring resistance. The resistance measuring instrument includes a housing 1, a measuring module and a calibration component 2. The measuring module is located inside the housing 1, and the measuring module is configured to measure the resistance of the resistor. Two terminals 11 are arranged on the surface of the housing 1 at intervals, and the terminals 11 are connected to the positive and negative poles of the measuring module one by one; the calibration component 2 includes a calibration resistor 21 with a known resistance and two connectors 22. The calibration resistor 21 is connected to the housing 1, and one end of the two connectors 22 is rotatably sleeved on the terminal 11 one by one, and the other end can be lapped on the input end and the output end of the calibration resistor 21 one by one.

[0042] The measuring module cooperates with the calibration component 2. Before formally measuring the resistance value of the resistor to be measured, the corresponding connectors 22 are rotated around the two terminal posts 11 respectively, so that the two connectors 22 are respectively connected to the input end and the output end of the calibration resistor 21. The measuring module measures the resistance value of the calibration resistor 21. Since the actual resistance value of the calibration resistor 21 is known, the measured value of the measuring module is compared with the actual resistance value to confirm the measurement accuracy of the measuring module. The operation process is simple and convenient, and the accuracy of the measuring module can be completed without the need for other external testing equipment.

[0043] Specifically, the housing 1 includes a guard plate 12, a connection hole 121 is provided on the guard plate 12, a protection groove 10 is provided on the housing 1, a terminal 11 is arranged in the protection groove 10, the guard plate 12 is slidably arranged at the opening of the protection groove 10, and the connection hole 121 can be connected to the opening of the protection groove 10. With the arrangement of the guard plate 12, the guard plate 12 cooperates with the protection groove 10, the protection groove 10 can prevent the terminal 11 from colliding with other objects, and the guard plate 12 can prevent dust from entering the protection groove 10 to a certain extent.

[0044] Specifically, the resistance measuring instrument further includes a display screen 3. A receiving groove 13 is provided on the housing 1. The display screen 3 is detachably arranged in the receiving groove 13, and the signal is connected to the measuring module. The setting of the display screen 3 can display the measurement result of the measuring module in real time, which is convenient for reading. The receiving groove 13 is used to store the display screen 3.

[0045] Preferably, in this embodiment, the display screen 3 and the measuring module are connected by wireless signals via Bluetooth, making the measuring operation simpler and more convenient.

[0046] Specifically, the housing 1 also includes a first elastic member 14, one end of the first elastic member 14 is connected to the inner wall of the protective groove 10, and the other end is connected to the guard plate 12, the protective groove 10 is connected to the accommodating groove 13, the guard plate 12 is provided with a pressing portion 122, and a first locking groove 31 is provided on the frame of the display screen 3, and the opening direction of the first locking groove 31 is consistent with the direction of the display screen 3; the display screen 3 has a closed state facing the bottom of the accommodating groove 13 and an open state facing away from the bottom of the accommodating groove 13. In the closed state, the pressing portion 122 presses against the frame of the display screen 3, and in the open state, the pressing portion 122 extends into the first locking groove 31 under the action of the elastic restoring force of the first elastic member 14, and presses against the bottom of the first locking groove 31. With the above arrangement, when the display screen 3 is in the closed state, the guard plate 12 blocks the opening of the protection groove 10, and external wires or plugs cannot extend into the protection groove 10. When the display screen 3 is in the open state, the connecting hole 121 is connected to the protection groove 10, so that external wires or plugs can extend into the protection groove 10, and the display screen 3 can be switched between the open state and the closed state by simply flipping it, which is simple and convenient to operate.

[0047] More specifically, a plurality of first elastic members 14 are arranged at intervals along the length direction of the guard plate 12. The above arrangement makes the force on the guard plate 12 more balanced and improves stability.

[0048] Preferably, in this embodiment, two first elastic members 14 are arranged at intervals along the length direction of the guard plate 12; in other embodiments, the number of first elastic members 14 can be set according to actual conditions, and is not specifically limited here.

[0049] More specifically, the housing 1 is provided with a connecting channel 15, one end of which is connected to the protection groove 10, and the other end of which is connected to the containing groove 13. A locking portion 32 is convexly provided on the frame of the display screen 3, and the locking portion 32 can extend into the connecting channel 15 and fit the inner wall of the connecting channel 15. The first locking groove 31 is provided on the locking portion 32. With the above arrangement, the locking portion 32 and the connecting channel 15 cooperate, so that the pressing portion 122 can slide along the connecting channel 15 and press against the frame of the display screen 3 or the bottom of the first locking groove 31.

[0050] Preferably, in this embodiment, the connecting channel 15 is in a straight line shape to ensure smoothness of the pressing portion 122 when moving in the connecting channel 15 .

[0051] More specifically, a plurality of locking parts 32 are arranged at intervals along the length direction of the display screen 3, and each locking part 32 is provided with a connecting channel 15 and a pressing part 122. The above arrangement makes the guard plate 12 more evenly stressed and highly stable.

[0052] Preferably, in this embodiment, two locking parts 32 are arranged at intervals along the length direction of the display screen 3; in other embodiments, the number of the locking parts 32 can be adjusted according to actual needs, and is not specifically limited here.

[0053] Specifically, the resistance measuring instrument further includes a switch assembly 4, which includes a locking block 41, a second elastic member 42 and an operating rod 43. Among them, a second locking groove 131 is provided on the inner wall of the receiving groove 13, and the locking block 41 is slidably arranged in the second locking groove 131; one end of the second elastic member 42 is connected to the groove bottom of the second locking groove 131, and the other end is connected to the locking block 41; a power connection groove 33 is provided on the frame of the display screen 3, and when the display screen 3 is located in the receiving groove 13, the power connection groove 33 is connected to the second locking groove 131, and an operating hole 16 connected to the second locking groove 131 is provided on the housing 1; the operating rod 43 is convexly provided on the locking block 41 and extends into the operating hole 16, and the operating rod 43 is configured to drive the locking block 41 to slide along the depth direction of the second locking groove 131. With the above configuration, the display screen 3 can be locked or unlocked in the receiving groove 13 by sliding the operating rod 43 to prevent the display screen 3 from falling.

[0054] Preferably, in this embodiment, the operating hole 16 is through along the thickness direction of the housing 1, the operating rod 43 extends out of the operating hole 16, and an anti-skid structure is provided on the operating rod 43. The anti-skid structure can be an anti-skid pad, such as a rubber pad, or the anti-skid structure can be an anti-skid protrusion, which can be a dot-shaped protrusion or a pattern protrusion of any shape, as long as the contact friction between the position where it is located and the hand of the measurement personnel can be increased. The specific form is referred to the prior art and is not specifically limited in this embodiment.

[0055] More specifically, a first power contact piece 331 is fixedly disposed in the power connection slot 33, a second power contact piece 411 is fixedly disposed on the locking block 41, the second power contact piece 411 is electrically connected to the measuring module, and the locking block 41 can drive the second power contact piece 411 to press against the first power contact piece 331. With the above arrangement, when the second power contact piece 411 presses against the first power contact piece 331, the display screen 3 is powered by the measuring module.

[0056] Specifically, a handle 17 is further provided on the housing 1. The provision of the handle 17 facilitates the measurement personnel to move the resistance measuring instrument.

[0057] More specifically, an anti-skid structure is provided on the handle 17. The anti-skid structure may be an anti-skid pad, such as a rubber pad, or an anti-skid protrusion, which may be a dot-shaped protrusion or a patterned protrusion of any shape, as long as the contact friction between the position where the anti-skid protrusion is located and the hand of the measurement personnel can be increased. The specific form thereof is referred to the prior art and is not specifically limited in this embodiment.

[0058] Preferably, in this embodiment, two handles 17 are arranged at intervals in the length direction of the display screen 3 .

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Resistance measuring instrument, It is characterized in that include: Housing (1); A measuring module is located inside the housing (1), the measuring module is configured to measure the resistance value of a resistor, two binding posts (11) are arranged at intervals on the surface of the housing (1), and the binding posts (11) are connected to the positive pole and the negative pole of the measuring module in a one-to-one correspondence; A calibration component (2) comprises a calibration resistor (21) of known resistance value and two connecting pieces (22), wherein the calibration resistor (21) is connected to the housing (1), one end of the two connecting pieces (22) is rotatably sleeved on the terminal (11) in a one-to-one correspondence, and the other end can be connected to the input end and the output end of the calibration resistor (21) in a one-to-one correspondence.

2. The resistance measuring instrument according to claim 1, It is characterized in that The housing (1) comprises a protective plate (12), a connecting hole (121) is provided on the protective plate (12), a protective groove (10) is provided on the housing (1), the terminal (11) is arranged in the protective groove (10), the protective plate (12) can be slidably arranged at the opening of the protective groove (10), and the connecting hole (121) can be connected to the opening of the protective groove (10).

3. The resistance measuring instrument according to claim 2, It is characterized in that It also comprises a display screen (3); a receiving groove (13) is provided on the housing (1); the display screen (3) is detachably arranged in the receiving groove (13), and is signal-connected to the measurement module.

4. The resistance measuring instrument according to claim 3, It is characterized in that The housing (1) further comprises a first elastic member (14), one end of the first elastic member (14) being connected to the inner wall of the protection groove (10), and the other end being connected to the guard plate (12), the protection groove (10) being connected to the receiving groove (13), the guard plate (12) being provided with a pressing portion (122), a first locking groove (31) being provided on the frame of the display screen (3), and an opening direction of the first locking groove (31) being consistent with the orientation of the display screen (3); The display screen (3) has a closed state facing toward the bottom of the accommodating groove (13) and an open state facing away from the bottom of the accommodating groove (13); in the closed state, the pressing portion (122) presses against the frame of the display screen (3); in the open state, the pressing portion (122) extends into the first locking groove (31) and presses against the bottom of the first locking groove (31) under the action of the elastic restoring force of the first elastic member (14).

5. The resistance measuring instrument according to claim 4, It is characterized in that A plurality of the first elastic members (14) are arranged at intervals along the length direction of the guard plate (12).

6. The resistance measuring instrument according to claim 4, It is characterized in that The housing (1) is provided with a connection channel (15), one end of the connection channel (15) is connected to the protection groove (10), and the other end is connected to the receiving groove (13), a locking portion (32) is convexly provided on the frame of the display screen (3), the locking portion (32) can extend into the connection channel (15) and fit the inner wall of the connection channel (15), and the first locking groove (31) is arranged on the locking portion (32).

7. The resistance measuring instrument according to claim 6, It is characterized in that A plurality of locking portions (32) are arranged at intervals along the length direction of the display screen (3), and each locking portion (32) is provided with a connecting channel (15) and a pressing portion (122).

8. The resistance measuring instrument according to claim 3, It is characterized in that It also includes a switch assembly (4), wherein the switch assembly (4) includes: A locking block (41), wherein a second locking groove (131) is formed on the inner wall of the accommodating groove (13), and the locking block (41) is slidably disposed in the second locking groove (131); A second elastic member (42), one end of which is connected to the bottom of the second locking groove (131), and the other end of which is connected to the locking block (41); a power connection groove (33) is provided on the frame of the display screen (3); when the display screen (3) is located in the receiving groove (13), the power connection groove (33) is connected to the second locking groove (131); and an operating hole (16) connected to the second locking groove (131) is provided on the housing (1); An operating rod (43) is protruded from the locking block (41) and extends into the operating hole (16). The operating rod (43) is configured to drive the operating rod (43) to slide along the depth direction of the second locking groove (131).

9. The resistance measuring instrument according to claim 8, It is characterized in that A first power connection piece (331) is fixedly arranged in the power connection slot (33), a second power connection piece (411) is fixedly arranged on the locking block (41), the second power connection piece (411) is electrically connected to the measurement module, and the locking block (41) can drive the second power connection piece (411) to press against the first power connection piece (331).

10. The resistance measuring instrument according to any one of claims 1 to 9, It is characterized in that The housing (1) is also provided with a handle (17).

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