Detachable digital multimeter

Abstract

The utility model discloses a detachable digital multimeter, which belongs to the technical field of digital multimeters and is characterized by comprising a shell, a groove is arranged on the back of the shell, a cover is mounted at an opening of the groove in a hinged manner, a cavity is arranged on the shell, a movable groove is arranged on one side wall of the cavity, and the movable groove is arranged in the movable groove. A movable hole communicated with the movable groove is formed in the side of the groove, two vertical plates are installed in the cavity, a threaded rod is rotationally installed between the vertical plates and the side wall of the cavity, a locking block is in threaded connection with the threaded rod, a locking hole matched with the locking block is formed in the cover, a first bevel gear is fixedly installed at one end of the threaded rod, and a rotating rod is rotationally installed on the shell; one end of the rotating rod extends into the cavity, a second bevel gear is installed at the end, close to the first bevel gear, of the rotating rod, a rectangular groove is formed in the outer side wall of the shell, the rotating rod is located in the middle of the rectangular groove, and a rotating disc is installed at the end, away from the second bevel gear, of the rotating rod.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital multimeter technical field, more specifically, it relates to a detachable digital multimeter. BACKGROUND

[0002] Digital multimeter (DMM) is a kind of multifunctional electronic measuring instrument, is widely used in electrical engineering, electronic testing and scientific research etc. Its main functions include measuring voltage, current, resistance, capacitance, frequency and other electrical parameters.

[0003] At present, in order to facilitate the maintenance of the later period, the detachable mode of the multimeter is usually screw fixed, buckle fixed, and the detachable mode has the following shortcomings in use: screw fixed, usually needs to use cross or straight screwdriver to detach the multimeter, and the straight slot and the cross slot of the screw are easily worn out, so that the screw is very troublesome to detach after being worn out, and buckle fixed usually uses detachable buckle integrated with the shell, and the fixing mode needs to pry the buckle with a tool, and sometimes too much force can damage the buckle or shell. Therefore, a detachable digital multimeter is needed to solve the above problems. UTILITARY MODEL

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a detachable digital multimeter, which has the advantages of convenient disassembly and maintenance.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A detachable digital multimeter, comprising a shell, a recess is formed on the back of the shell, a cover is hingedly installed at the opening of the recess, a cavity is formed on the shell, a movable slot is formed on one side wall of the cavity, a movable hole is formed on the side of the recess and communicates with the movable slot, two vertical plates are installed in the cavity, a threaded rod is rotatably installed between the vertical plate and the side wall of the cavity, a lock block is threadedly connected to the threaded rod, and a lock hole is formed on the cover and matched with the lock block.

[0007] One end of the lock block is slidably installed in the movable slot and the movable hole, a first bevel gear is fixedly installed at one end of the threaded rod, a rotating rod is rotatably installed on the shell, one end of the rotating rod extends into the cavity, a second bevel gear is installed on the end of the rotating rod close to the first bevel gear, the second bevel gear and the first bevel gear are meshed with each other, a rectangular slot is formed on the outer side wall of the shell, the rotating rod is located at the middle position of the rectangular slot, and a rotating disc is installed on the end of the rotating rod away from the second bevel gear.

[0008] According to the advantages of the scheme, at least in the need for cleaning and maintenance of the inside of the multimeter, by rotating the rotating disc, the rotating disc drives the rotating rod and the second bevel gear to rotate, the second bevel gear drives the first bevel gear and the threaded rod fixedly connected with the first bevel gear to rotate between the vertical plate and the inner side wall of the cavity, so that the lock block threaded with the threaded rod moves in the movable groove and the moving groove, and is away from the lock hole of the sealing cover, and then the cover is pulled out of the groove, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and maintained, avoiding the situation that the multimeter needs to be assembled and disassembled by using tools in the prior art.

[0009] The utility model further sets up: install the sealing assembly for sealing the rectangular groove in the slot of rectangular groove, open the round groove on the casing, the inner side wall of round groove is surrounded with the wave shape's clamping groove, fix the pivot in the round groove, the sealing assembly includes the sealing cover of rotation installation on the pivot and the elastic fixing spare of being located on the sealing cover and being with clamping groove cooperation.

[0010] According to the advantages of the scheme, at least in the need for cleaning and maintenance of the inside of the multimeter, by rotating the rotating disc, the rotating disc drives the rotating rod and the second bevel gear to rotate, the second bevel gear drives the first bevel gear and the threaded rod fixedly connected with the first bevel gear to rotate between the vertical plate and the inner side wall of the cavity, so that the lock block threaded with the threaded rod moves in the movable groove and the moving groove, and is away from the lock hole of the sealing cover, and then the cover is pulled out of the groove, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and maintained, avoiding the situation that the multimeter needs to be assembled and disassembled by using tools in the prior art.

[0011] The utility model further sets up: open U type groove in the side wall of sealing cover, the elastic fixing spare includes spring and fixed ball, the spring is fixed and is installed in U type groove, the fixed ball is fixedly installed in the end of spring.

[0012] According to the advantages of the scheme, at least in the need for cleaning and maintenance of the inside of the multimeter, by rotating the rotating disc, the rotating disc drives the rotating rod and the second bevel gear to rotate, the second bevel gear drives the first bevel gear and the threaded rod fixedly connected with the first bevel gear to rotate between the vertical plate and the inner side wall of the cavity, so that the lock block threaded with the threaded rod moves in the movable groove and the moving groove, and is away from the lock hole of the sealing cover, and then the cover is pulled out of the groove, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and maintained, avoiding the situation that the multimeter needs to be assembled and disassembled by using tools in the prior art.

[0013] The utility model further sets up: install the magnet block of opposite sex attraction on the casing and sealing cover respectively.

[0014] According to the advantages of the scheme, at least in the need for cleaning and maintenance of the inside of the multimeter, by rotating the rotating disc, the rotating disc drives the rotating rod and the second bevel gear to rotate, the second bevel gear drives the first bevel gear and the threaded rod fixedly connected with the first bevel gear to rotate between the vertical plate and the inner side wall of the cavity, so that the lock block threaded with the threaded rod moves in the movable groove and the moving groove, and is away from the lock hole of the sealing cover, and then the cover is pulled out of the groove, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and maintained, avoiding the situation that the multimeter needs to be assembled and disassembled by using tools in the prior art.

[0015] The utility model further sets up: open the take hand groove of taking out sealing cover on the casing, install the convex block on sealing cover.

[0016] According to the advantages of the scheme, at least in the need for cleaning and maintenance of the inside of the multimeter, by rotating the rotating disc, the rotating disc drives the rotating rod and the second bevel gear to rotate, the second bevel gear drives the first bevel gear and the threaded rod fixedly connected with the first bevel gear to rotate between the vertical plate and the inner side wall of the cavity, so that the lock block threaded with the threaded rod moves in the movable groove and the moving groove, and is away from the lock hole of the sealing cover, and then the cover is pulled out of the groove, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and maintained, avoiding the situation that the multimeter needs to be assembled and disassembled by using tools in the prior art.

[0017] The utility model further sets up: in the bottom of casing and the bottom of lid all are pasted with antiskid pad, the strong magnet is embedded in the four corner position of antiskid pad.

[0018] According to the advantages of this scheme, at least in: by setting antiskid pad, antiskid pad not only can prevent skidding, but also can avoid the abrasion of casing and lid bottom, inlaying strong magnet in antiskid pad is convenient for multimeter to be adsorbed on iron material and thus liberates hands, increases the applicability of multimeter.

[0019] Summarized above, the utility model has at least following advantages:

[0020] 1, by setting threaded rod, rotating rod, lock block and lock hole, when needing to clean and maintain the inside of multimeter, rotating the rotating disc, the rotating disc drives rotating rod and second bevel gear to rotate, second bevel gear drives first bevel gear and the threaded rod fixedly connected with it to rotate between the inner side wall of vertical plate and chamber, so that lock block is moved in movable slot and moving groove with threaded rod, and is far away from the lock hole of sealing cover, and then the cover is pulled out from the recess, and the multimeter can be easily opened, and the inside of multimeter is cleaned and maintained, avoiding the condition that the multimeter is assembled and disassembled using tool in prior art occurs;

[0021] 2, by setting sealing cover, sealing cover can avoid dirt and dust or water into rectangular groove, prevent the corrosion and rust of internal threaded rod and rotating rod, by the setting of spring and fixed ball, fixed ball is lifted by spring and extends into the clamping groove in round groove, and sealing cover keeps original state under the condition of no external rotation, under the condition of external force, sealing cover can be rotated and opened;

[0022] 3, by setting magnet block, using the characteristic that magnet block repels each other, sealing cover can be more firmly fixed on the outer wall of casing, by the setting of hand slot and protruding block, the maintainer can more conveniently and quickly open the cover. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall schematic view of the embodiment;

[0024] Figure 2 It is the overall schematic view of the casing in the embodiment;

[0025] Figure 3 It is the explosion schematic view of the embodiment;

[0026] Figure 4 It is Figure 3 It is the enlarged schematic view of part A in the embodiment;

[0027] Figure 5 It is the overall schematic view of sealing cover in the embodiment.

[0028] Fig. 1 is a shell; 2 is a cover; 3 is a chamber; 4 is a movable slot; 5 is a movable hole; 6 is a vertical plate; 7 is a threaded rod; 8 is a locking block; 9 is a locking hole; 10 is a first bevel gear; 11 is a rotating rod; 12 is a second bevel gear; 13 is a rectangular slot; 14 is a rotating disc; 15 is a sealing assembly; 1501 is a sealing cover; 1502 is an elastic fixing piece; 15021 is a spring; 15022 is a fixing ball; 16 is a circular slot; 1601 is a rotating shaft; 17 is a clamping slot; 18 is a U-shaped slot; 19 is a magnet block; 20 is a hand holding slot; 21 is a protrusion; 22 is an anti-skid pad; 23 is a strong magnet. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail below in combination with the drawings.

[0030] A detachable digital multimeter, as shown in Figure 1 , Figure 2 , Figure 3 , comprises a shell 1, a recess is formed in the back of the shell 1, a cover 2 is hingedly installed at the opening of the recess, a chamber 3 is formed in the shell 1, a movable slot 4 is formed in one side wall of the chamber 3, a movable hole 5 is formed in the side of the recess and communicates with the movable slot 4, two vertical plates 6 are installed in the chamber 3, a threaded rod 7 is rotatably installed between the vertical plate 6 and the side wall of the chamber 3, a locking block 8 is threadedly connected to the threaded rod 7, and a locking hole 9 is formed in the cover 2 and matches the locking block 8.

[0031] One end of the locking block 8 is slidably installed in the movable slot 4 and the movable hole 5, a first bevel gear 10 is fixedly installed at one end of the threaded rod 7, a rotating rod 11 is rotatably installed on the shell 1, one end of the rotating rod 11 extends into the chamber 3, a second bevel gear 12 is installed at the end of the rotating rod 11 close to the first bevel gear 10, the second bevel gear 12 meshes with the first bevel gear 10, a rectangular slot 13 is formed in the outer side wall of the shell 1, the rotating rod 11 is located at the middle position of the rectangular slot 13, and a rotating disc 14 is installed at the end of the rotating rod 11 away from the second bevel gear 12.

[0032] As shown in Figure 4 , Figure 5As shown in the drawings, in order to prevent dirt and dust or water from entering into the rectangular groove 13, in some embodiments, a sealing assembly 15 for sealing the rectangular groove 13 is installed on the slot of the rectangular groove 13, a circular groove 16 is formed on the shell 1, a wavy clamping groove 17 is arranged on the inner side wall of the circular groove 16, a rotating shaft 1601 is fixed in the circular groove 16, the sealing cover 1501 is rotatably installed on the rotating shaft 1601, and the elastic fixing piece 1502 is arranged on the sealing cover 1501 and matched with the clamping groove 17. A U-shaped groove 18 is formed on one side wall of the sealing cover 1501, and it is worth mentioning that the elastic fixing piece 1502 comprises a spring 15021 and a fixed ball 15022, the spring 15021 is fixedly arranged in the U-shaped groove 18, and the fixed ball 15022 is fixedly installed on the end of the spring 15021.

[0033] As shown in the drawings, Figure 5 In order to make the sealing cover 1501 more firmly fixed on the slot of the rectangular groove 13, in the preferred embodiment, a magnet block 19 with opposite magnetic poles is respectively installed on the shell 1 and the sealing cover 1501. By using the characteristic that the magnet blocks 19 with opposite magnetic poles attract each other, the sealing cover 1501 is more firmly fixed on the outer wall of the shell 1.

[0034] As shown in the drawings, Figure 3 In order to facilitate the repairer to more quickly open the cover 2, in some embodiments, a hand-taking groove 20 for taking out the sealing cover 1501 is formed on the shell 1, and a protruding block 21 is installed on the sealing cover 1501. In order to prevent the shell 1 and the bottom of the cover 2 from being worn due to long-time friction, an anti-skid pad 22 is pasted on the bottom of the shell 1 and the bottom of the cover 2, and a strong magnet 23 is embedded at the four corner positions of the anti-skid pad 22. Embedding the strong magnet 23 in the anti-skid pad 22 facilitates the multimeter to be adsorbed on the iron material, thereby freeing the hands and increasing the applicability of the multimeter.

[0035] The working process and beneficial effects of the utility model are as follows:

[0036] When it is necessary to clean and repair the inside of the multimeter, the sealing cover 1501 is first rotated and rotated to leak out of the rectangular groove 13, then the rotating disc 14 is rotated, the rotating disc 14 drives the rotating rod 11 and the second bevel gear 12 to rotate, the second bevel gear 12 drives the first bevel gear 10 and the threaded rod 7 fixedly connected with the first bevel gear 10 to rotate between the inner side wall of the vertical plate 6 and the cavity 3, so that the lock block 8 threadedly connected with the threaded rod 7 moves in the movable groove and the moving groove and moves away from the lock hole 9 of the sealing cover 1501, the cover 2 is pulled out of the recess through the hand-taking groove 20 and the protruding block 21, the multimeter can be easily opened, and the inside of the multimeter can be cleaned and repaired, thereby avoiding the situation that tools are needed to assemble and disassemble the multimeter in the prior art.

[0037] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the design concept of the present application shall be included in the protection scope of the present application.

Claims

1. A detachable digital multimeter, comprising a housing (1), a recess is formed on the back of the housing (1), a cover (2) is hingedly installed at the opening of the recess, characterized in that: A cavity (3) is formed on the shell (1), one side wall of the cavity (3) is formed with a movable slot (4), a movable hole (5) is formed on the side of the groove and communicates with the movable slot (4), two vertical plates (6) are installed in the cavity (3), a threaded rod (7) is rotatably installed between the vertical plate (6) and the side wall of the cavity (3), a lock block (8) is threadedly connected to the threaded rod (7), a lock hole (9) is formed on the cover (2) and matches the lock block (8); One end of the lock block (8) is slidably installed in the movable slot (4) and the movable hole (5), a first bevel gear (10) is fixedly installed on one end of the threaded rod (7), a rotating rod (11) is rotatably installed on the shell (1), one end of the rotating rod (11) extends into the cavity (3), a second bevel gear (12) is installed on the end of the rotating rod (11) close to the first bevel gear (10), the second bevel gear (12) and the first bevel gear (10) are meshed with each other, a rectangular slot (13) is formed on the outer side wall of the shell (1), the rotating rod (11) is located at the middle position of the rectangular slot (13), and a rotating disc (14) is installed on the end of the rotating rod (11) away from the second bevel gear (12).

2. A pocket digital multimeter according to claim 1, wherein: A sealing assembly (15) for sealing the rectangular slot (13) is installed on the slot of the rectangular slot (13), a circular groove (16) is formed on the shell (1), a wave-shaped clamping groove (17) is arranged on the inner side wall of the circular groove (16), a rotating shaft (1601) is fixedly installed in the circular groove (16), the sealing assembly (15) comprises a sealing cover (1501) rotatably installed on the rotating shaft (1601) and an elastic fixing member (1502) located on the sealing cover (1501) and matched with the clamping groove (17).

3. A pocket digital multimeter according to claim 2, wherein: A U-shaped groove (18) is formed on one side wall of the sealing cover (1501), the elastic fixing member (1502) comprises a spring (15021) and a fixed ball (15022), the spring (15021) is fixedly installed in the U-shaped groove (18), and the fixed ball (15022) is fixedly installed on the end of the spring (15021).

4. A pocket digital multimeter according to claim 3, wherein: Magnet blocks (19) of different shapes that attract each other are respectively installed on the shell (1) and the sealing cover (1501).

5. A pocket digital multimeter according to claim 4, wherein: A taking hand groove (20) is formed on the shell (1) to facilitate taking out the sealing cover (1501), and a protruding block (21) is installed on the sealing cover (1501).

6. A pocket digital multimeter according to claim 5, wherein: Anti-slip pads (22) are attached to the bottom of the shell (1) and the bottom of the cover (2), and powerful magnets (23) are embedded at the four corner positions of the anti-slip pads (22).

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