Hand-held DC resistance tester

Abstract

The invention relates to the technical field of resistance testers, and discloses a handheld direct-current resistance tester which comprises a resistance tester body, a display screen is arranged on the upper portion of the front side of the resistance tester body, and a plurality of operation buttons are arranged on the lower portion of the front side of the resistance tester body. Placement control mechanisms are arranged at the two ends of the resistance tester body, each placement control mechanism comprises an illumination assembly and a holding control assembly and is used for providing illumination when the detector works and controlling the detector by a user, and functional mechanisms are arranged at the two ends of the resistance tester body and are used for protecting the detector. And a fixing mechanism is arranged on the rear side of the resistance tester body, comprises a replacement assembly and a fixing assembly, and is convenient for a user to hold the tester by hand to work. A user can conveniently and accurately control the measurement process through a finger holding groove, a measurement trigger key and a mode switching roller of the holding control assembly, and optimization of man-machine interaction is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of resistance testers, in particular to a handheld direct current resistance tester. Background Art

[0002] In the field of power equipment testing, resistance measurement is an important means of determining the operating status of equipment. Handheld DC resistance testers are a common tool for on-site testing due to their portability and flexibility. However, existing handheld DC resistance testers have many shortcomings in practical applications and cannot meet the high-precision measurement requirements under complex operating conditions.

[0003] On the one hand, traditional handheld DC resistance testers have defects in human-computer interaction design. In a low-light detection environment, the lack of effective lighting devices makes it difficult for users to clearly observe the measured part and the instrument display data, affecting measurement efficiency and accuracy; at the same time, the grip structure does not conform to the ergonomic design, and long-term use can easily cause hand fatigue. In addition, the layout of the operating buttons and measurement trigger components is unreasonable, there is a risk of misoperation, and precise control cannot be achieved.

[0004] On the other hand, the protection and heat dissipation performance of the equipment needs to be improved. The existing instruments lack a reliable buffer protection structure in the event of an accidental collision, which can easily cause damage to internal components; the data transmission interface and the external device interface have single functions and are difficult to adapt to diverse detection needs; in addition, the heat dissipation system mostly adopts passive heat dissipation. During long-term high-current measurements, serious heat accumulation occurs inside the instrument, causing the performance of electronic components to drift and the measurement accuracy to decrease. When not in use, the heat dissipation port lacks effective sealing protection, and foreign matter such as dust and water vapor can easily enter the instrument, affecting the reliability and service life of the equipment.

[0005] Furthermore, the stability design of handheld operation is insufficient. Traditional fixing mechanisms are mostly single strap structures, which cannot be flexibly adjusted according to the needs of different users. In special scenarios such as high-altitude operations and narrow spaces, the instrument is prone to slipping, posing a safety hazard. The fixing process is complicated and it is difficult to quickly adapt to different operating environments, which reduces detection efficiency.

[0006] In view of this, an object of the present invention is to provide a handheld DC resistance tester to solve the deficiencies in the prior art. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a handheld DC resistance tester, which solves the problem of being difficult to adapt to diverse detection needs.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A handheld DC resistance tester, including a resistance tester body, a display screen is provided on the upper front part of the resistance tester body, a plurality of operation buttons are provided on the lower front part of the resistance tester body, placement control mechanisms are provided at both ends of the resistance tester body, the placement control mechanisms include a lighting component and a grip control component, which are used to provide lighting for the tester when working and for the user to control the tester, functional mechanisms are provided at both ends of the resistance tester body, which are used to protect the tester, a fixing mechanism is provided on the rear side of the resistance tester body, the fixing mechanism includes a replacement component and a fixing component, which is used to facilitate the user to hold the tester when working, a heat dissipation shielding mechanism is provided at the bottom of the resistance tester body, the heat dissipation shielding mechanism includes a heat dissipation component and a sealing component, which are used to dissipate heat from the tester and seal and protect the heat dissipation component at the bottom of the tester when not in use.

[0009] Preferably, the lighting assembly in the placement control mechanism includes a plurality of lighting lamps arranged on the upper front side of the resistance tester body, and a lighting lamp switch is fixedly installed on the top of the resistance tester body.

[0010] Preferably, the gripping control component includes a plurality of finger gripping grooves provided at both ends of the resistance tester body, a measurement trigger key is provided inside the finger gripping groove at one end, and a mode switching roller is provided inside the finger gripping groove at the other end.

[0011] Preferably, the functional mechanism includes anti-collision pads fixedly installed at both ends of the resistance tester body, a data transmission interface is provided on the upper part of one end of the resistance tester body, an external device interface is provided above the data transmission interface, a temperature sensor is also fixedly installed on the top of the resistance tester body, and a plurality of heat dissipation holes are provided at the other end of the resistance tester body.

[0012] Preferably, the replacement component in the fixing mechanism includes two fixing plates fixedly installed on the rear side of the resistance tester body, and both fixing plates are provided with snap-in grooves, and both snap-in grooves are provided with fixed slides, and the two snap-in grooves are respectively adapted to the fixed slides.

[0013] Preferably, the fixing assembly includes an elastic strap fixedly mounted between the upper portions of the two fixed slides, and elastic pads are fixedly mounted on both sides of the interior of the two fixing plates.

[0014] Preferably, the heat dissipation shielding mechanism includes a plurality of heat dissipation fans arranged at the bottom of the resistance tester body, one side of the bottom of the resistance tester body is rotatably connected to a rotating rod, and one side of the rotating rod is fixedly connected to a protective cover.

[0015] Preferably, the sealing assembly includes a locking ring fixedly mounted on one end of the protective cover, a locking seat fixedly mounted on the other side of the bottom of the resistance tester body, sealing rubber pads are provided on both sides of the protective cover, and the locking ring is adapted to the locking seat.

[0016] Preferably, an anti-slip pad is provided on the rear side of the resistance tester body.

[0017] Preferably, the cooling fan is electrically connected to a temperature sensor.

[0018] The present invention provides a handheld DC resistance tester. It has the following beneficial effects: 1. The present invention arranges control mechanisms at both ends of the resistance tester body, wherein the lighting lamp in the lighting assembly provides lighting when light is insufficient, and the finger gripping groove, measurement trigger key and mode switching wheel of the control assembly enable the user to accurately control the measurement process, thereby optimizing human-computer interaction. It can not only meet the measurement needs in complex environments, but also effectively improve the convenience of operation and measurement accuracy, thereby enhancing work efficiency.

[0019] 2. The present invention sets functional mechanisms at both ends of the resistance tester body, uses anti-collision pads to reduce collision damage to the instrument, and realizes data transmission and function expansion through the data transmission interface and the external device interface. At the same time, the temperature sensor monitors the ambient temperature in real time and cooperates with the cooling fan and protective cover of the heat dissipation shielding mechanism to dissipate heat and provide protection, thereby achieving all-round protection of the instrument. It can not only adapt to a variety of working environments, but also effectively improve the reliability and service life of the instrument and reduce maintenance costs.

[0020] 3. The present invention sets a fixing mechanism on the rear side of the resistance tester body, uses the fixing plate, snap-in slot and fixed slide of the replacement component to adjust the position of the elastic strap, and provides comfortable fixation through the elastic strap and elastic pad of the fixing component. Combined with the anti-slip pad on the rear side, the stability of handheld operation is optimized, which not only meets the handholding needs of different users, but also effectively reduces fatigue during operation and improves the stability and accuracy during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front side schematic diagram of the present invention; Figure 2 It is a rear side schematic diagram of the present invention; Figure 3 It is a schematic diagram of the placement control mechanism of the present invention; Figure 4 It is a schematic diagram of the fixing mechanism of the present invention; Figure 5 It is a schematic diagram of the card slot structure of the present invention; Figure 6Schematic diagram of the heat dissipation shielding mechanism of the present invention; Figure 7 Schematic diagram of the heat dissipation assembly of the present invention.

[0022] Among them, 1. Resistance tester body; 2. Display screen; 3. Operation button; 4. Placement control mechanism; 401. Light; 402. Light switch; 403. Finger grip groove; 404. Measurement trigger key; 405. Mode switching wheel; 5. Functional mechanism; 501. Anti-collision pad; 502. Data transmission interface; 503. External device interface; 504. Temperature sensor; 505. Heat dissipation hole; 6. Fixing mechanism; 601. Fixing plate; 602. Snap-in slot; 603. Fixed slide; 604. Elastic strap; 605. Elastic pad; 7. Heat dissipation shielding mechanism; 701. Cooling fan; 702. Rotating rod; 703. Protective cover; 704. Locking ring; 705. Locking seat; 706. Sealing pad; 8. Anti-slip pad. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Please see the attached Figure 1 -Attached Figure 7 An embodiment of the present invention provides a handheld DC resistance tester, including a resistance tester body 1, a display screen 2 is provided on the upper front part of the resistance tester body 1, a plurality of operation buttons 3 are provided on the lower front part of the resistance tester body 1, and placement control mechanisms 4 are provided at both ends of the resistance tester body 1. The placement control mechanism 4 includes a lighting component and a grip control component, which is used to provide lighting for the tester when working and for the user to control the tester. Functional mechanisms 5 are provided at both ends of the resistance tester body 1, which are used to protect the tester. A fixing mechanism 6 is provided on the rear side of the resistance tester body 1, and the fixing mechanism 6 includes a replacement component and a fixing component, which is used to facilitate the user to hold the tester when working. A heat dissipation shielding mechanism 7 is provided at the bottom of the resistance tester body 1, and the heat dissipation shielding mechanism 7 includes a heat dissipation component and a sealing component, which is used to dissipate heat from the tester and seal and protect the heat dissipation component at the bottom of the tester when not in use.

[0025] The lighting assembly placed in the control mechanism 4 includes a plurality of lighting lamps 401 arranged on the upper front side of the resistance tester body 1, and a lighting lamp switch 402 is fixedly installed on the top of the resistance tester body 1; Specifically, the lighting component placed in the control mechanism 4 includes multiple lighting lamps 401 arranged on the upper front side of the resistance tester body 1. The lighting lamps 401 use high-brightness LED light sources. A lighting lamp switch 402 is fixedly installed on the top of the resistance tester body 1 to facilitate the user to quickly turn on or off the lighting function, provide sufficient lighting for the test environment with insufficient light, and ensure that the user can clearly observe the tested part.

[0026] The grip control assembly includes a plurality of finger grip grooves 403 provided at both ends of the resistance tester body 1, a measurement trigger key 404 is provided inside the finger grip groove 403 at one end, and a mode switching roller 405 is provided inside the finger grip groove 403 at the other end; Specifically, the grip control component includes multiple finger grip grooves 403, both of which are provided at both ends of the resistance tester body 1. The shape and size of these finger grip grooves 403 are designed according to ergonomics, and can fit the contours of the fingers tightly, reducing the user's fatigue when gripping. A measurement trigger key 404 is provided inside the finger grip groove 403 at one end. The trigger force of the measurement trigger key 404 is moderate, and the measurement program can be quickly started when the finger is pressed. A mode switching roller 405 is provided inside the finger grip groove 403 at the other end. By sliding the mode switching roller 405 with a finger, different measurement modes can be easily adjusted, achieving precise control of the measurement process and meeting diverse measurement needs.

[0027] The functional mechanism 5 includes anti-collision pads 501 fixedly mounted on both ends of the resistance tester body 1. A data transmission interface 502 is provided on the upper portion of one end of the resistance tester body 1. An external device interface 503 is provided above the data transmission interface 502. A temperature sensor 504 is also fixedly mounted on the top of the resistance tester body 1. A plurality of heat dissipation holes 505 are provided on the other end of the resistance tester body 1. Specifically, the functional mechanism 5 includes anti-collision pads 501 fixedly mounted at both ends of the resistance tester body 1. The anti-collision pads 501 can effectively absorb the impact force of the instrument when it collides accidentally, reducing damage to the instrument. A data transmission interface 502 is provided on the upper part of one end of the resistance tester body 1. Through the data transmission interface 502, the measurement data can be quickly transmitted to an external storage device or computer, which is convenient for data analysis and management. An external device interface 503 is provided above the data transmission interface 502 to expand the function of the instrument. A temperature sensor 504 is also fixedly mounted on the top of the resistance tester body 1. The temperature sensor 504 can monitor the ambient temperature in real time and provide an accurate basis for temperature compensation of the resistance measurement data. A plurality of heat dissipation holes 505 are provided at the other end of the resistance tester body 1. These heat dissipation holes 505 cooperate with the heat dissipation shielding mechanism 7 at the bottom to achieve effective heat dissipation inside the instrument.

[0028] The replacement assembly in the fixing mechanism 6 includes two fixing plates 601 fixedly mounted on the rear side of the resistance tester body 1. The two fixing plates 601 are provided with a snap-in slot 602 inside. The two snap-in slots 602 are provided with a fixed slide 603 inside. The two snap-in slots 602 are respectively adapted to the fixed slide 603. Specifically, the replacement component in the fixing mechanism 6 includes two fixing plates 601 fixedly installed on the rear side of the resistance tester body 1, and the two fixing plates 601 are each provided with a snap-in groove 602, and the two snap-in grooves 602 are each provided with a fixed slide 603. The two snap-in grooves 602 are respectively adapted to the fixed slide 603, and the fixed slide 603 can be tightly clamped in the snap-in groove 602. At the same time, the fixed slide 603 can slide flexibly in the snap-in groove 602, which is convenient for adjusting the position of the fixing component according to the needs of the user.

[0029] The fixing assembly includes an elastic band 604 fixedly mounted between the upper portions of the two fixed slides 603, and elastic pads 605 fixedly mounted on both sides of the interior of the two fixing plates 601; Specifically, the fixing assembly includes an elastic band 604 fixed between the upper portions of the two fixing slides 603. This elastic band 604 exhibits excellent elasticity and wear resistance. When the user holds the instrument, they pass their wrist through the elastic band 604, which automatically adjusts its tightness based on the thickness of their wrist, providing a comfortable fixation. Elastic pads 605 are fixedly mounted on both sides of the two fixing plates 601 to increase the friction of the fixing slides 603 within the snap-in slots 602.

[0030] The heat dissipation shielding mechanism 7 includes a plurality of heat dissipation fans 701 arranged at the bottom of the resistance tester body 1. A rotating rod 702 is rotatably connected to one side of the bottom of the resistance tester body 1. A protective cover 703 is fixedly connected to one side of the rotating rod 702. Specifically, the heat dissipation shielding mechanism 7 includes multiple cooling fans 701 located at the bottom of the resistance tester body 1. When the internal temperature of the instrument rises, this accelerates air circulation, effectively dissipating heat from the tester. A rotating rod 702 is rotatably connected to one side of the bottom of the resistance tester body 1. A protective cover 703 is fixedly connected to one side of the rotating rod 702. Rotating the rotating rod 702 drives the protective cover 703 to rotate, either covering or uncovering the cooling fans 701.

[0031] The sealing assembly includes a locking ring 704 fixedly mounted on one end of the protective cover 703, a locking seat 705 fixedly mounted on the other side of the bottom of the resistance tester body 1, and sealing pads 706 are provided on both sides of the protective cover 703. The locking ring 704 is adapted to the locking seat 705; Specifically, the sealing assembly includes a locking ring 704 fixedly mounted on one end of the protective cover 703, a locking seat 705 fixedly mounted on the other side of the bottom of the resistance tester body 1, and sealing pads 706 provided on both sides of the protective cover 703. The locking ring 704 is adapted to the locking seat 705. When the tester is not in use, the rotating rod 702 is rotated to drive the protective cover 703 to cover the bottom cooling fan 701, and the locking ring 704 is fastened to the locking seat 705. The sealing pads 706 now form a tight seal, preventing dust, moisture, etc. from entering the instrument interior, providing good protection.

[0032] An anti-slip pad 8 is provided on the rear side of the resistance tester body 1; Specifically, an anti-skid pad 8 is provided on the rear side of the resistance tester body 1. The anti-skid pad 8 can increase the friction between the instrument and the hand, further preventing the instrument from slipping from the hand, and ensuring the stability of handheld operation.

[0033] The cooling fan 701 is electrically connected to the temperature sensor 504; Specifically, cooling fan 701 is electrically connected to temperature sensor 504. When temperature sensor 504 detects that the internal temperature of the instrument has risen to a preset threshold, it automatically sends a start signal to cooling fan 701, which starts to dissipate heat. When the temperature drops back to a normal range, cooling fan 701 automatically stops, achieving intelligent control of the cooling function, ensuring normal heat dissipation of the instrument while reducing energy consumption.

[0034] Working principle: First, the display screen 2 is used to display measurement data, temperature compensation results and other information in real time. The operation button 3 can perform basic operations such as range switching and function selection. The multiple lights 401 of the lighting component are turned on after pressing the light switch 402 on the top, providing lighting for the test environment with insufficient light, so that the user can clearly observe the measured part; the finger gripping groove 403 fits the contour of the finger. When the user holds it, the finger can naturally fall into the groove. The measurement trigger key 404 in the finger gripping groove 403 at one end starts the measurement program when the finger is pressed. The mode switching roller 405 in the finger gripping groove 403 at the other end can adjust different measurement modes by sliding the finger, thereby realizing precise control of the measurement process.

[0035] The anti-collision pad 501 can reduce the damage to the instrument during accidental collision. The data transmission interface 502 is used to connect external devices to transmit measurement data. The external device interface 503 can be connected to an external device. The temperature sensor 504 monitors the ambient temperature in real time. The heat dissipation hole 505 cooperates with the heat dissipation shielding mechanism 7 at the bottom to achieve the heat dissipation function. When the temperature sensor 504 detects that the internal temperature of the instrument has risen, the heat dissipation fan 701 electrically connected to it is started to dissipate the internal heat and ensure that the instrument operates at an appropriate temperature. When not in use, the protective cover 703 is driven to cover the bottom heat dissipation fan 701 by rotating the rotating rod 702, the locking ring 704 is buckled with the locking seat 705, and the sealing gasket 706 forms a seal to prevent dust, water vapor, etc. from entering the interior of the instrument, thereby playing a protective role.

[0036] The two snap-in slots 602 are adapted to the fixed slide 603, so that the fixed slide 603 can slide in the snap-in slots 602, which is convenient for adjusting the position of the elastic strap 604 according to the user's needs. The elastic strap 604 is installed between the fixed plates 601 through the two fixed slides 603. When the user holds the instrument, the wrist is passed through the elastic strap 604. The elastic strap 604 can automatically adjust the tightness according to the thickness of the wrist. The elastic pads 605 on both sides of the fixed plate 601 increase the contact comfort. At the same time, the anti-slip pad 8 further prevents the instrument from slipping from the hand, ensuring the stability of the handheld operation.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A handheld DC resistance tester, characterized in that: The invention comprises a resistance tester body (1), wherein a display screen (2) is provided on the upper front side of the resistance tester body (1), a plurality of operation buttons (3) are provided on the lower front side of the resistance tester body (1), a placement control mechanism (4) is provided at both ends of the resistance tester body (1), the placement control mechanism (4) comprises a lighting component and a gripping control component, which is used to provide lighting for the tester when working and for the user to control the tester, a functional mechanism (5) is provided at both ends of the resistance tester body (1), which is used to protect the tester, a fixing mechanism (6) is provided at the rear side of the resistance tester body (1), the fixing mechanism (6) comprises a replacement component and a fixing component, which is used to facilitate the user to hold the tester in operation, and a heat dissipation shielding mechanism (7) is provided at the bottom of the resistance tester body (1), the heat dissipation shielding mechanism (7) comprises a heat dissipation component and a sealing component, which is used to dissipate heat from the tester and to seal and protect the heat dissipation component at the bottom of the tester when not in use.

2. A handheld DC resistance tester according to claim 1, characterized in that: The lighting assembly in the placement control mechanism (4) comprises a plurality of lighting lamps (401) arranged on the upper front side of the resistance tester body (1), and a lighting lamp switch (402) is fixedly mounted on the top of the resistance tester body (1).

3. A handheld DC resistance tester according to claim 1, characterized in that: The grip control assembly comprises a plurality of finger grip grooves (403) provided at both ends of the resistance tester body (1), a measurement trigger key (404) being provided inside the finger grip groove (403) at one end, and a mode switching roller (405) being provided inside the finger grip groove (403) at the other end.

4. A handheld DC resistance tester according to claim 1, characterized in that: The functional mechanism (5) comprises anti-collision pads (501) fixedly mounted on both ends of the resistance tester body (1); a data transmission interface (502) is provided on the upper portion of one end of the resistance tester body (1); an external device interface (503) is provided above the data transmission interface (502); a temperature sensor (504) is also fixedly mounted on the top of the resistance tester body (1); and a plurality of heat dissipation holes (505) are provided on the other end of the resistance tester body (1).

5. A handheld DC resistance tester according to claim 1, characterized in that: The replacement component in the fixing mechanism (6) comprises two fixing plates (601) fixedly mounted on the rear side of the resistance tester body (1), each of the two fixing plates (601) being provided with a snap-in slot (602), each of the two snap-in slots (602) being provided with a fixed slide seat (603), and the two snap-in slots (602) being respectively adapted to the fixed slide seat (603).

6. A handheld DC resistance tester according to claim 5, characterized in that: The fixing assembly comprises an elastic band (604) fixedly mounted between the upper portions of the two fixed slides (603), and elastic pads (605) are fixedly mounted on both sides of the interior of the two fixing plates (601).

7. A handheld DC resistance tester according to claim 1, characterized in that: The heat dissipation shielding mechanism (7) comprises a plurality of heat dissipation fans (701) arranged at the bottom of the resistance tester body (1); a rotating rod (702) is rotatably connected to one side of the bottom of the resistance tester body (1); and a protective cover (703) is fixedly connected to one side of the rotating rod (702).

8. The handheld DC resistance tester according to claim 1, characterized in that: The sealing assembly comprises a locking ring (704) fixedly mounted on one end of the protective cover (703); a locking seat (705) is fixedly mounted on the other side of the bottom of the resistance tester body (1); sealing rubber pads (706) are provided on both sides of the protective cover (703); and the locking ring (704) is adapted to the locking seat (705).

9. The handheld DC resistance tester according to claim 1, characterized in that: An anti-slip pad (8) is provided on the rear side of the resistance tester body (1).

10. The handheld DC resistance tester according to claim 7, characterized in that: The cooling fan (701) is electrically connected to the temperature sensor (504).

Images