CN219224858U - Dustproof and waterproof type digital multipurpose meter - Google Patents

Abstract

The utility model relates to a dustproof and waterproof digital multipurpose meter, which comprises a multipurpose meter assembly, wherein the multipurpose meter assembly comprises a shell upper cover and a shell lower cover, the shell upper cover is provided with a first annular rib, the shell lower cover is provided with a first rectangular waterproof groove, the shell upper cover and the shell lower cover are fixedly connected through a first screw, the first annular rib is clamped with the first rectangular waterproof groove, a first annular sealing ring is arranged in the first rectangular waterproof groove, and the first annular sealing ring is used for sealing a gap between the first annular rib and the first rectangular waterproof groove; the back of the lower cover of the shell is provided with a battery groove covered by a battery cover, and a battery is arranged in the battery groove; the battery groove is provided with a second circular waterproof groove, and a second annular sealing ring is arranged inside the second circular waterproof groove; the battery cover is provided with a second annular rib matched with the second circular waterproof groove; the upper cover of the shell is rotationally connected with a knob, and a third annular sealing ring is arranged between the knob and the upper cover of the shell.

Description

Dustproof and waterproof type digital multipurpose meter

Technical Field

The utility model relates to a dustproof and waterproof digital multipurpose meter, and belongs to the technical field of digital multipurpose meters.

Background

The digital multimeter is an electronic instrument for electrical measurement, and is mainly used for measuring voltage, current and resistance. The digital multipurpose meter is used as modern multipurpose electronic measuring instrument, and can measure DC current, DC voltage, AC current, AC voltage, resistance, on-off of circuit, temperature, capacitance, inductance and some parameters of semiconductor (such as beta), etc. even the digital multipurpose meter also provides Bluetooth, infrared and USB interface functions, can communicate with personal computer, mobile phone, etc. and is widely used in the measuring fields of physics, electricity, electronics, etc. Such as network maintainers, automobile maintainers, home appliance maintainers, electronic DIY fans and the like generally need the instrument to have basic electric parameter testing functions such as voltage, resistance, on-off of a circuit and the like, and the personnel generally have a digital multi-purpose meter.

However, due to the influence of working environment of users, when working in the environment with higher level of rain, humidity or dust pollution, most of the existing digital multimeter has no dustproof and waterproof functions, and the short circuit phenomenon easily occurs after the components in the digital multimeter are wetted or adsorbed with dust, so that the service life of the digital multimeter is greatly reduced; therefore, it is necessary to design a digital multimeter which has a simple structure and can prevent water and dust.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the dustproof and waterproof digital multipurpose meter, which can prevent dust and water from entering the digital multipurpose meter and avoid the condition of short circuit in the digital multipurpose meter.

The technical scheme of the utility model is as follows:

the utility model provides a dustproof waterproof type digital multipurpose meter, includes the multipurpose meter subassembly, the multipurpose meter subassembly includes casing upper cover and casing lower cover, the casing upper cover is equipped with first annular rib, and the casing lower cover is equipped with first shape waterproof groove that returns, casing upper cover and casing lower cover pass through first screw fastening connection, first annular rib and first shape waterproof groove block, first shape waterproof groove inside is provided with first ring seal, and first ring seal is used for airtight first annular rib and first shape waterproof groove interval; the back of the lower cover of the shell is provided with a battery groove covered by a battery cover, and a battery is arranged in the battery groove; the battery groove is provided with a second circular waterproof groove, and a second annular sealing ring is arranged inside the second circular waterproof groove; the battery cover is provided with a second annular rib matched with the second circular waterproof groove; the upper cover of the shell is rotationally connected with a knob, and a third annular sealing ring is arranged between the knob and the upper cover of the shell.

The multipurpose meter assembly further comprises a driving turntable, a clamp spring, a key, a small circuit board, a circuit board and a meter pen; the upper cover of the shell is provided with a lens and an input jack for inserting a meter pen, the upper cover of the shell, the lens and the input jack are integrally formed, the upper part of the upper cover of the shell, which is positioned above a knob, is provided with a key, the key is fixedly connected with a small circuit board through a second screw, the knob is connected to the outer wall of the upper cover of the shell through a clamp spring, and the knob is matched with a driving turntable for rotation through a knob insert at the tail end; the circuit board is arranged behind the small circuit board, a display screen is arranged on the circuit board, and the lens completely covers the display screen; the display screen, the keys and the input jacks are all electrically connected with the circuit board.

The key is provided with a first annular rib, and the first annular rib is arranged on the periphery of the first annular rib; the inner wall of the third annular rib is tightly fit with the surface of the key facing one side.

The inner side wall of the upper cover of the shell is provided with a plurality of hollow columns, the lower cover of the shell is provided with plastic holes which are nested and matched with the hollow columns, fourth annular sealing rings are respectively placed in the plastic holes, and after the lower cover of the shell is fastened by first screws, gaps between the hollow columns and the plastic holes are eliminated by the fourth annular sealing rings.

The inner wall of the upper cover of the shell is provided with annular and uniformly distributed tooth-shaped grooves, the driving turntable is assembled in the tooth-shaped grooves, one end of the driving turntable is provided with a hexagonal hole which is matched with the knob insert, and the other end of the driving turntable is matched with the positioning hole of the circuit board by arranging a circular positioning pin; the driving turntable is characterized in that 4 elastic arms are circumferentially arranged around the driving turntable, arc-shaped clamping points are respectively arranged at the end parts of the elastic arms, and the arc-shaped clamping points are matched with the tooth-shaped grooves to realize rotary gear shifting.

The rotary table is provided with a mounting rib, the mounting rib is provided with a V-shaped contact piece, and the rotary table is provided with a direction indication mark for infrared identification of an automatic V-shaped contact piece assembling machine.

The outer surface package of casing upper cover and casing lower cover has casing upper cover rubber coating and casing lower cover rubber coating, be provided with the table pen storage tank that is used for accomodating the table pen on the casing lower cover rubber coating, table pen storage tank top has set gradually second table pen constant head tank and first table pen constant head tank, table pen middle part is provided with insulated gate, second table pen constant head tank and first table pen constant head tank are used for fixed insulated gate.

Wherein, be provided with on the casing lower cover outer wall and turn over a support.

The utility model has the following beneficial effects:

through the cooperation of first shape waterproof groove, second shape waterproof groove and first ring seal and second ring seal, the water that sees through the junction gap between casing upper cover and the casing lower cover and between battery cover and the casing lower cover and get into can be blocked, can prevent that water from entering into inside the casing, better improvement the waterproof performance of digital multimeter.

Through setting up fourth ring seal between hollow post and plastics hole, the water that sees through the casing lower cover seam clearance entering can be blocked by fourth ring seal to prevent that water from entering into inside the casing, improved the waterproof performance of digital multimeter.

Through with the integrative injection moulding of lens, input jack and casing upper cover, there is not the joint gap, the input jack is the blind hole of machining moreover to prevent that water from entering into inside the casing, improved the waterproof performance of digital multimeter.

Through the close fit of the inner contour of the third annular rib and the outer contour of the key, the matching surface of the key can be tightly attached to the inner wall of the upper cover of the shell, so that water is prevented from entering the shell, and the waterproof performance of the digital multimeter is improved.

Through setting up the third ring seal between knob and casing upper cover, the water that sees through the gap between knob and the casing upper cover and gets into is blocked by the third ring seal to prevent that water from entering into inside the casing, improved the waterproof performance of digital multimeter.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the connection of the lens to the upper cover of the housing;

FIG. 3 is a schematic diagram showing the connection of the input jack and the upper cover of the shell;

FIG. 4 is a schematic illustration of the connection of a first annular rib, a first annular water shield groove, and a first annular seal ring of the present utility model;

FIG. 5 is a schematic illustration of the connection of a second annular rib, a second annular water shield groove, and a second annular seal ring of the present utility model;

FIG. 6 is a schematic diagram of a key installation of the present utility model;

FIG. 7 is a schematic illustration of the knob assembly of the present utility model;

FIG. 8 is an enlarged view of FIG. 7 in accordance with the present utility model;

FIG. 9 is a schematic view of the waterproofing means of the screw of the present utility model fastening the housing upper cover and the housing lower cover;

FIG. 10 is a schematic diagram of the turntable assembly of the present utility model;

FIG. 11 is a schematic view of a pen receiving slot in the lower cover of the housing of the present utility model.

The reference numerals in the drawings are as follows:

1. a knob; 101. a knob insert; 2. a third annular seal ring; 3. a housing upper cover; 301. a first annular rib; 302. a third annular rib; 303. a hollow column; 304. encapsulating the upper cover of the shell; 305. a tooth-shaped groove; 4. an input jack; 5. a lens; 6. a turntable; 601. an elastic arm; 602. arc-shaped clamping points; 603. a direction indication mark; 604. a positioning pin; 605. a mounting rib; 7. clamping springs; 8. v-shaped contact pieces; 9. a key; 901. a mating surface; 10. a small circuit board; 11. a second screw; 12. a circuit board; 13. a display screen; 14. a first annular seal ring; 15. a fourth annular seal ring; 16. a first screw; 17. a housing lower cover; 1701. a first rectangular waterproof groove; 1702. a second water-proof tank; 1703. a plastic hole; 1704. encapsulating the lower cover of the shell; 1705. a pen storage groove; 1706. a first stylus positioning groove; 1707. a second stylus positioning groove; 18. a battery; 19. a second annular seal ring; 21. a bracket; 22. a battery cover; 2201. a second annular rib; 23. a meter pen; 2301. an insulated gate.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

Referring to fig. 1 and 2, the utility model provides a technical scheme:

the utility model provides a dustproof waterproof type digital multimeter, including the multimeter subassembly, the multimeter subassembly includes casing upper cover 3 and casing lower cover 17, casing upper cover 3 is equipped with first annular rib 301, casing lower cover 17 is equipped with first shape waterproof groove 1701 that returns, casing upper cover 3 and casing lower cover 17 pass through first screw 16 fastening connection, first annular rib 301 and first shape waterproof groove 1701 block, be provided with first ring seal 14 inside the first shape waterproof groove 1701, first ring seal 14 is used for airtight first annular rib 301 and the clearance between first shape waterproof groove 1701 that returns; the back of the lower cover 17 of the shell is provided with a battery groove covered by a battery cover 22, and a battery is arranged in the battery groove; the battery groove is provided with a second circular waterproof groove 1702, and a second annular sealing ring 19 is arranged in the second circular waterproof groove 1702; the battery cover 22 is provided with a second annular rib 2201 matched with the second circular waterproof groove 1702; the upper cover 3 of the shell is rotationally connected with a knob 1, and a third annular sealing ring 2 is arranged between the knob 1 and the upper cover 3 of the shell; specifically, the battery 18 in the battery tank adopts a lithium ion rechargeable battery, and adopts a 18650 battery pack which is common in the market, so that the battery is convenient to purchase and has low cost; and set up in the gear of shutting down and charge, digital multimeter duration is long, convenient to use, avoids the battery lid 22 to change the battery more frequently simultaneously, and carelessly damages second ring seal 19, and then influences the waterproof performance of complete machine.

Specifically, as shown in fig. 1, 2, 3, 7 and 8, the multipurpose meter assembly further includes a driving turntable 6, a clamping spring 7, a key 9, a small circuit board 10, a circuit board 12 and a meter pen 23; the upper cover 3 of the shell is provided with a lens 5 and an input jack 4 for inserting a meter pen 23, the upper cover 3 of the shell, the lens 5 and the input jack 4 are integrally formed, a key 9 is arranged above the knob 1 on the upper cover 3 of the shell, the key 9 is fixedly connected with a small circuit board 10 through a second screw 11, the knob 1 is connected to the outer wall of the upper cover 3 of the shell through a clamp spring 7, and the knob 1 is matched with the driving turntable 6 to rotate through a knob insert 101 at the tail end; the circuit board 12 is arranged behind the small circuit board 10, the circuit board 12 is provided with a display screen 13, and the lens 5 completely covers the display screen 13; the display 13, the keys 9 and the input jacks 4 are all electrically connected with the circuit board 12.

Further, a mating surface 901 is formed on one side of the key 9 close to the inner wall of the upper cover 3 of the housing, and a third annular rib 302 is arranged around the mating surface 901 of the upper cover 3 of the housing; the inner wall of the third annular rib 302 closely fits the key 9 towards one side surface; specifically, the inner side of the third annular rib 302 presses the surface of the keyboard for fixing the key 9, and has an interference of 0.3mm, which can further play a role in waterproofing, preventing water, dust, etc. from entering from the gap where the key 9 is connected with the housing upper cover 3.

Further, as shown in fig. 1 and 9, the inner side wall of the upper cover 3 of the housing is provided with a plurality of hollow columns 303, the lower cover 17 of the housing is provided with plastic holes 1703 which are nested and matched with the hollow columns 303, the fourth annular sealing rings 15 are respectively arranged in the plastic holes 1703, and after the first screws 16 fasten the lower cover 17 of the housing, the gaps between the hollow columns 303 and the plastic holes 1703 are eliminated by the fourth annular sealing rings 15.

Further, as shown in fig. 1 and 10, the inner wall of the upper cover 3 of the housing is provided with annular and uniformly distributed tooth-shaped grooves 305, the driving turntable 6 is assembled in the tooth-shaped grooves 305, one end of the driving turntable 6 is provided with a hexagonal hole to be matched with the knob insert 101, and the other end is matched with a positioning hole of the circuit board 12 by arranging a circular positioning pin 604; 4 elastic arms 601 are circumferentially arranged around the driving turntable 6, arc-shaped clamping points 602 are respectively arranged at the ends of the elastic arms 601, and the arc-shaped clamping points 602 are matched with the tooth-shaped grooves 305 to realize rotary gear shifting; the turntable 6 is provided with a mounting rib 605, and the mounting rib 605 is provided with a V-shaped contact piece 8; when the knob 1 is turned, the internal rotary disk 6 is driven, and meanwhile, the V-shaped contact piece 8 is switched to different functional gears, so that different measuring circuits in the interior are enabled to work; further, the direction indication mark 603 is arranged on the turntable 6 and used for automatically assembling the infrared identification of the V-shaped contact piece 8 machine, and the installation direction of the turntable 6 can be conveniently identified by operators on a product assembling line or in maintenance, so that the assembly error is avoided.

Further, as shown in fig. 9 and 11, the outer surfaces of the upper cover 3 and the lower cover 17 are respectively covered by an upper cover rubber coating 304 and a lower cover rubber coating 1704, a pen meter storage slot 1705 for storing a pen meter 23 is arranged on the lower cover rubber coating 1704, a second pen meter positioning slot 1707 and a first pen meter positioning slot 1706 are sequentially arranged above the pen meter storage slot 1705, an insulation grid 2301 is arranged in the middle of the pen meter 23, and the second pen meter positioning slot 1707 and the first pen meter positioning slot 1706 are used for fixing the insulation grid 2301; specifically, when the pen 23 needs to be held in the pen holding groove 1705, the pen 23 is placed in the pen holding groove 1705 of the lower cover 17 of the housing, so that the insulation grid 2301 of the pen 23 is placed in the first pen positioning groove 1706, and at this time, the metal nib of the pen 23 protrudes slightly from the upper end of the digital multimeter; when the meter pen 23 is required to be accommodated in the meter pen accommodating groove 1705, the insulating grid 2301 of the meter pen 23 is placed in the second meter pen positioning groove 1707, and at this time, the metal pen point 2302 of the meter pen is completely positioned in the meter pen accommodating groove 1705, and no meter body is protruded; the housing upper cap rubber 304 and the housing lower cap rubber 1704 are wear resistant TPE soft rubber with a thicker texture on the surface. Preferably, a bracket 21 can be additionally arranged on the back of the lower cover 17 of the shell, and the watch can be turned outwards by an angle through the bracket 21, so that the watch can stand, and the screen can be observed when the watch is convenient to use.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (8)

1. A dustproof and waterproof type digital multipurpose meter is characterized in that: the multipurpose meter comprises a multipurpose meter assembly, wherein the multipurpose meter assembly comprises a housing upper cover (3) and a housing lower cover (17), the housing upper cover (3) is provided with a first annular rib (301), the housing lower cover (17) is provided with a first annular waterproof groove (1701), the housing upper cover (3) and the housing lower cover (17) are fixedly connected through a first screw (16), the first annular rib (301) and the first annular waterproof groove (1701) are clamped, a first annular sealing ring (14) is arranged in the first annular waterproof groove (1701), and the first annular sealing ring (14) is used for sealing a gap between the first annular rib (301) and the first annular waterproof groove (1701); the back of the lower cover (17) of the shell is provided with a battery groove covered by a battery cover (22), and a battery (18) is arranged in the battery groove; the battery groove is provided with a second circular waterproof groove (1702), and a second annular sealing ring (19) is arranged inside the second circular waterproof groove (1702); a second annular rib (2201) matched with the second circular waterproof groove (1702) is arranged on the battery cover (22); the shell upper cover (3) is rotationally connected with a knob (1), and a third annular sealing ring (2) is arranged between the knob (1) and the shell upper cover (3).

2. A dustproof and waterproof digital multimeter as recited in claim 1, wherein: the multipurpose meter assembly further comprises a driving turntable (6), a clamp spring (7), a key (9), a small circuit board (10), a circuit board (12) and a meter pen (23); the portable electronic device is characterized in that a lens (5) and an input jack (4) for inserting a meter pen (23) are arranged on the upper cover (3) of the shell, the lens (5) and the input jack (4) are integrally formed, a key (9) is arranged above the knob (1) on the upper cover (3) of the shell, the key (9) is fixedly connected with a small circuit board (10) through a second screw (11), the knob (1) is connected to the outer wall of the upper cover (3) of the shell through a clamp spring (7), and the knob (1) is matched with the driving turntable (6) to rotate through a knob insert (101) at the tail end; the circuit board (12) is arranged behind the small circuit board (10), a display screen (13) is arranged on the circuit board (12), and the lens (5) completely covers the display screen (13); the display screen (13), the keys (9) and the input jacks (4) are electrically connected with the circuit board (12).

3. A dustproof and waterproof digital multimeter as recited in claim 2, wherein: one side of the key (9) close to the inner wall of the upper cover (3) of the shell is provided with a matching surface (901), and a third annular rib (302) is arranged around the matching surface (901) of the upper cover (3) of the shell; the inner wall of the third annular rib (302) is tightly matched with the surface of the key (9) facing one side.

4. A dustproof and waterproof digital multimeter as recited in claim 2, wherein: the inner side wall of the upper shell cover (3) is provided with a plurality of hollow columns (303), the lower shell cover (17) is provided with plastic holes (1703) which are nested and matched with the hollow columns (303), fourth annular sealing rings (15) are respectively arranged in the plastic holes (1703), and after the lower shell cover (17) is fastened by first screws (16), gaps between the hollow columns (303) and the plastic holes (1703) are eliminated by the fourth annular sealing rings (15).

5. A dustproof and waterproof digital multimeter as recited in claim 2, wherein: the inner wall of the upper cover (3) of the shell is provided with annular and uniformly distributed tooth-shaped grooves (305), the driving turntable (6) is assembled in the tooth-shaped grooves (305), one end of the driving turntable (6) is provided with a hexagonal hole to be matched with the knob insert (101), and the other end of the driving turntable is matched with the positioning hole of the circuit board (12) by arranging a circular positioning pin (604); 4 elastic arms (601) are circumferentially arranged around the driving turntable (6), arc-shaped clamping points (602) are respectively arranged at the ends of the elastic arms (601), and the arc-shaped clamping points (602) are matched with the tooth-shaped grooves (305) to realize rotary gear shifting; the turntable (6) is provided with a mounting rib (605), and the mounting rib (605) is provided with a V-shaped contact piece (8).

6. A dustproof and waterproof digital multimeter according to claim 5, wherein: the rotary table (6) is provided with a direction indication mark (603) for infrared identification of a machine for automatically assembling the V-shaped contact piece (8).

7. A dustproof and waterproof digital multimeter as recited in claim 1, wherein: the utility model discloses a table pen, including casing upper cover (3) and casing lower cover (17), the surface of casing upper cover rubber coating (304) and casing lower cover rubber coating (1704) have been wrapped up respectively, be provided with on casing lower cover rubber coating (1704) and be used for accomodating table pen (23) table pen holding tank (1705), table pen holding tank (1705) top has set gradually second table pen constant head tank (1707) and first table pen constant head tank (1706), table pen (23) middle part is provided with insulated gate (2301), second table pen constant head tank (1707) and first table pen constant head tank (1706) are used for fixed insulated gate (2301).

8. A dustproof and waterproof digital multimeter as recited in claim 1, wherein: the outer wall of the lower cover (17) of the shell is provided with a turnover bracket (21).

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