Anti-drop digital multimeter

Abstract

The utility model discloses an anti-drop digital multimeter, and belongs to the technical field of digital multimeters. According to the anti-falling digital multimeter, a double-layer shell structure, a display screen protection design, a circuit board fixing design and anti-falling measures are adopted, so that the anti-falling performance of the digital multimeter can be effectively improved, and the damage to the digital multimeter during falling is reduced. When the digital multimeter falls accidentally, the tension spring and the spring can buffer the impact force caused by falling, so that the impact force on the display screen and the circuit board is reduced, and the internal parts of the multimeter can be effectively protected from being damaged. The anti-falling digital multimeter has good anti-falling performance, so that the damage of the digital multimeter in the use process can be reduced, the service life of the digital multimeter is prolonged, and the anti-falling digital multimeter has the effects of improving the anti-falling performance and prolonging the service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of digital multimeters, and more specifically it relates to a drop-proof digital multimeter. Background Technology

[0002] In fields such as electronic engineering and electrical maintenance, digital multimeters are commonly used measuring tools. They can accurately measure electrical parameters such as voltage, current, and resistance, providing important reference data for technicians.

[0003] Digital multimeters typically consist of a plastic casing, display screen, circuit board, and other components, all of which are easily damaged by external impacts. Especially during use, if a digital multimeter is accidentally dropped, it can lead to problems such as a cracked casing, damaged display screen, or loosened circuit board, thus affecting its normal operation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shockproof digital multimeter, which has the advantages of improving its shock resistance and extending its service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A drop-proof digital multimeter includes a housing, a display screen, a circuit board, and a battery compartment. The housing includes a front shell and a bottom shell, which are combined to form a receiving space. Both the front shell and the bottom shell have a double-layer structure. The front shell has a through hole, and the top of the front shell has several circular grooves. Each of the circular grooves has a tension spring, and the lower end of the tension spring is connected to a common mounting plate. The display screen is disposed on the side of the mounting plate near the tension spring and passes through the through hole.

[0007] The bottom shell has several sleeves on the side face of the top shell. Each sleeve has a telescopic rod movably connected inside it. A rubber sheet is fixedly connected to the end of each telescopic rod. A compression spring is fitted onto the outer periphery of the sleeves and the telescopic rods. The two ends of the compression spring are fixedly connected to the rubber sheet and the bottom shell, respectively. The circuit board is mounted on the rubber sheet by screws. The battery compartment includes a battery slot and a battery cover. The battery slot is located on the side face of the bottom shell near the top shell. The battery cover is mounted on the end of the battery slot by screws.

[0008] The advantages of this solution are at least as follows: This novel drop-resistant digital multimeter employs a double-layer shell structure, a protective display screen design, and a circuit board fixing design, effectively improving its drop resistance and reducing damage during drops. When the multimeter is accidentally dropped, the tension springs and springs cushion the impact, reducing the impact on the display screen and circuit board, effectively protecting the internal components from damage. Because of its excellent drop resistance, this novel drop-resistant digital multimeter reduces damage during use, thus extending its lifespan.

[0009] The present invention is further provided with a soft rubber gasket between the front shell and the bottom shell.

[0010] The advantages of this solution are at least as follows: By incorporating soft rubber gaskets, the gaskets effectively mitigate the impact force on the front and back covers when the digital multimeter is dropped, preventing wear on the contact surfaces and thus avoiding loosening of the connections between components. They also effectively fill the tiny gaps between the front and back covers, preventing moisture, dust, and other external substances from entering the device, thereby improving the waterproof and dustproof performance of the electronic equipment.

[0011] The present invention is further configured such that: the bottom shell has a plurality of rectangular grooves on one end face of the top shell, and the top shell has a rectangular post that matches the rectangular grooves on one end face of the bottom shell, and the rectangular post passes through a washer and engages with the rectangular groove.

[0012] The advantages of this scheme are at least as follows: by setting rectangular slots and rectangular pillars, the contact area between the front and back shells can be significantly increased. This not only helps to improve the connection strength between the front and back shells, but also enhances the stability of the structure and further improves the stability of the circuit board.

[0013] The present invention is further configured such that: a rubber frame is provided around the through hole, the rubber frame is bonded to the surface shell with glue, and an acrylic plate is provided inside the rubber frame, the acrylic plate is bonded to the surface shell with glue.

[0014] The advantages of this solution are at least as follows: by setting up a rubber frame and an acrylic plate, a good protective effect can be achieved, avoiding direct damage to the display screen. The rubber frame covering the outer wall of the display screen can initially alleviate the pressure generated when the acrylic plate is impacted, preventing strong shocks from being directly transmitted to the display screen or digital multimeter and causing unnecessary damage.

[0015] The present invention is further configured such that: the outer diameter of the acrylic sheet is larger than that of the through hole, and the inner diameter of the rubber frame is the same as that of the outer diameter of the acrylic sheet.

[0016] The advantages of this solution are at least that the rubber frame and acrylic sheet can better buffer the impact force generated from the outside and prevent the impact force from being transmitted to the display screen again.

[0017] The present invention is further configured such that: the bottom shell is provided with a mounting part for snapping the battery cover on the end face of the side of the top shell.

[0018] The advantages of this solution are at least as follows: by setting up the mounting part, the battery cover can be effectively prevented from becoming loose when the digital multimeter is accidentally dropped, and the battery can also be prevented from becoming loose during use, thus increasing the safety and stability of use.

[0019] In summary, this utility model has at least the following advantages:

[0020] 1. By incorporating soft rubber gaskets, these gaskets effectively mitigate the impact of drops on the front and back covers of the digital multimeter, preventing wear on the contact surfaces and potential loosening of components. They also effectively fill the tiny gaps between the front and back covers, preventing moisture, dust, and other external substances from entering the device, thereby improving its waterproof and dustproof performance.

[0021] 2. By incorporating rectangular slots and pillars, the contact area between the front and back shells can be significantly increased. This not only helps improve the connection strength between the front and back shells but also enhances the stability of the structure and further improves the stability of the circuit board.

[0022] 3. By setting up a rubber frame and acrylic sheet, a good protective effect can be achieved, avoiding direct damage to the display screen. The rubber frame on the outer wall of the display screen can initially alleviate the pressure generated when the acrylic sheet is impacted, preventing strong shock from being directly transmitted to the display screen or digital multimeter and causing unnecessary damage.

[0023] 4. By setting up the mounting part, the battery cover can be effectively prevented from becoming loose when the digital multimeter is accidentally dropped. It can also prevent the battery from becoming loose during use, increasing the safety and stability of use. Attached Figure Description

[0024] Figure 1 This is an exploded view of a preferred embodiment of the present invention;

[0025] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0026] Figure 3 for Figure 1 Enlarged schematic diagram of part B;

[0027] Figure 4 This is a schematic diagram of a preferred embodiment of the present invention.

[0028] Reference numerals: 1. Housing; 101. Front shell; 102. Bottom shell; 2. Display screen; 3. Circuit board; 4. Battery compartment; 401. Battery slot; 402. Battery cover; 5. Tension spring; 6. Mounting plate; 7. Sleeve; 8. Telescopic rod; 9. Rubber sheet; 10. Compression spring; 11. Soft rubber washer; 12. Rectangular groove; 13. Rectangular column; 14. Rubber frame; 15. Acrylic sheet; 16. Mounting part. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0030] A shockproof digital multimeter, such as Figure 1 As shown, the device includes a housing 1, a display screen 2, a circuit board 3, and a battery compartment 4. The housing 1 includes a front shell 101 and a bottom shell 102, which are combined to form a receiving space. Both the front shell 101 and the bottom shell 102 have a double-layer structure. The front shell 101 has a through hole, and the top of the front shell 101 has several circular grooves, each containing a tension spring 5 (see reference). Figure 2 The lower end of the tension spring 5 is connected to a common mounting plate 6. The display screen 2 is set on the side end face of the mounting plate 6 near the tension spring 5 and passes through the through hole.

[0031] The bottom shell 102 is provided with several sleeves 7 on the end face of the side of the top shell 101 (for reference). Figure 3 Each sleeve 7 is movably connected to a telescopic rod 8 (see reference). Figure 3 A rubber sheet 9 is fixedly connected to the end of the telescopic rod 8, and a compression spring 10 is sleeved on the outer peripheral wall of the sleeve 7 and the telescopic rod 8 (see reference). Figure 3The compression spring 10 is fixedly connected at both ends to the rubber sheet 9 and the bottom shell 102, respectively. The circuit board 3 is mounted on the rubber sheet 9 with screws. The battery compartment 4 includes a battery slot 401 and a battery cover 402. The battery slot 401 is located on the end face of the bottom shell 102 near the top shell 101, and the battery cover 402 is mounted on the end of the battery slot 401 with screws. This novel drop-proof digital multimeter adopts a double-layer shell structure: an outer layer of high-strength engineering plastic and an inner layer of buffer rubber. The high-strength engineering plastic shell has excellent impact resistance, effectively protecting the internal components of the digital multimeter from external impacts. The buffer rubber layer has excellent cushioning performance, further absorbing external impacts and reducing the impact force on the internal components. Combined with the protective design of the display screen 2 and the fixing design of the circuit board 3, these drop-proof measures effectively improve the drop resistance of the digital multimeter and reduce damage during drops. When this digital multimeter is accidentally dropped, the tension spring 5 and the spring can cushion the impact of the fall, reducing the impact on the display screen 2 and circuit board 3, and effectively protecting the internal components of the multimeter from damage. Because this shockproof digital multimeter has excellent drop resistance, it can reduce damage during use, thereby extending the service life of the digital multimeter.

[0032] like Figure 1 As shown, a soft rubber gasket 11 is provided between the front cover 101 and the back cover 102. By providing the soft rubber gasket 11, it can effectively reduce the impact force on the front cover 101 and back cover 102 when the digital multimeter is dropped, preventing wear on the contact surfaces of the front cover 101 and back cover 102 that could lead to loosening of the connection between components. It can also effectively fill the tiny gaps between the front cover 101 and back cover 102, preventing moisture, dust, and other external substances from entering the device, thereby improving the waterproof and dustproof performance of the electronic device.

[0033] like Figure 1 As shown, the bottom shell 102 has several rectangular grooves 12 on its end face near the top shell 101, and the top shell 101 has rectangular posts 13 that fit the rectangular grooves 12 on its end face near the bottom shell 102. The rectangular posts 13 pass through washers and engage with the rectangular grooves 12. By providing the rectangular grooves 12 and rectangular posts 13, the contact area between the top shell 101 and the bottom shell 102 can be significantly increased. This not only helps to improve the connection strength between the top shell 101 and the bottom shell 102, but also enhances the stability of the structure and further improves the stability of the circuit board 3.

[0034] like Figure 1As shown, a rubber frame 14 is provided around the through hole. The rubber frame 14 is bonded to the front cover 101 with adhesive. An acrylic plate 15 is provided inside the rubber frame 14 and is bonded to the front cover 101 with adhesive. By setting the rubber frame 14 and the acrylic plate 15, a good protective effect can be achieved, avoiding direct damage to the display screen 2. The rubber frame 14, which covers the outer wall of the display screen 2, can provide initial relief from the pressure generated when the acrylic plate 15 is impacted, preventing strong shocks from being directly transmitted to the display screen 2 or digital multimeters and causing unnecessary damage.

[0035] like Figure 1 As shown, the outer diameter of the acrylic sheet 15 is larger than that of the through hole, and the inner diameter of the rubber frame 14 is the same as that of the acrylic sheet 15. The rubber frame 14 and the acrylic sheet 15 can better buffer the impact force generated from the outside and prevent the impact force from being transmitted to the display screen 2.

[0036] like Figure 1 As shown, the bottom shell 102 has a mounting part 16 on the end face of the top shell 101 for engaging the battery cover 402. By providing the mounting part 16, the battery cover 402 is effectively prevented from becoming loose when the digital multimeter is accidentally dropped, and the battery is also prevented from becoming loose during use, thus increasing the safety and stability of use.

[0037] The working process and beneficial effects of this utility model are as follows: This utility model's drop-proof digital multimeter adopts a double-layer shell structure, a protective design for the display screen 2, and a fixed design for the circuit board 3, which effectively improves the drop resistance of the digital multimeter and reduces damage to the multimeter when dropped. When the digital multimeter is accidentally dropped, the tension spring 5 and the spring can buffer the impact force from the fall, reducing the impact force on the display screen 2 and the circuit board 3, and effectively protecting the internal components of the multimeter from damage. Because this utility model's drop-proof digital multimeter has good drop resistance, it can reduce damage to the digital multimeter during use, thereby extending the service life of the digital multimeter.

Claims

1. A shockproof digital multimeter, comprising a housing (1), a display screen (2), a circuit board (3), and a battery compartment (4), characterized in that: The housing (1) includes a front shell (101) and a bottom shell (102). The front shell (101) and the bottom shell (102) are combined to form a receiving space. Both the front shell (101) and the bottom shell (102) adopt a double-layer structure. The front shell (101) is provided with a through hole. The top of the front shell (101) is provided with several circular grooves. Each of the circular grooves is provided with a tension spring (5). The lower end of the tension spring (5) is connected to a common mounting plate (6). The display screen (2) is set on the side end face of the mounting plate (6) near the tension spring (5) and passes through the through hole. The bottom shell (102) is provided with several sleeves (7) on the end face of the top shell (101). Each sleeve (7) is movably connected with a telescopic rod (8). The end of the telescopic rod (8) is fixedly connected with a rubber sheet (9). A compression spring (10) is sleeved on the outer peripheral wall of the sleeve (7) and the telescopic rod (8). The two ends of the compression spring (10) are fixedly connected to the rubber sheet (9) and the bottom shell (102) respectively. The circuit board (3) is set on the rubber sheet (9) by screws. The battery compartment (4) includes a battery slot (401) and a battery cover (402). The battery slot (401) is located on the end face of the bottom shell (102) on the side face of the top shell (101). The battery cover (402) is installed at the end of the battery slot (401) by screws.

2. The shockproof digital multimeter according to claim 1, characterized in that: A soft rubber gasket (11) is provided between the front shell (101) and the bottom shell (102).

3. The shockproof digital multimeter according to claim 1, characterized in that: The bottom shell (102) has several rectangular grooves (12) on one side of the top shell (101). The top shell (101) has rectangular posts (13) that are adapted to the rectangular grooves (12) on one side of the bottom shell (102). The rectangular posts (13) pass through the washers and are engaged with the rectangular grooves (12).

4. A shockproof digital multimeter according to claim 1, characterized in that: A rubber frame (14) is provided around the through hole. The rubber frame (14) is bonded to the face shell (101) with glue. An acrylic plate (15) is provided inside the rubber frame (14). The acrylic plate (15) is bonded to the face shell (101) with glue.

5. A shockproof digital multimeter according to claim 4, characterized in that: The outer diameter of the acrylic sheet (15) is larger than that of the through hole, and the inner diameter of the rubber frame (14) is the same as that of the outer diameter of the acrylic sheet (15).

6. A shockproof digital multimeter according to claim 1, characterized in that: The bottom shell (102) has a mounting part (16) on the end face of the side of the top shell (101) for snapping the battery cover (402).

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