Protective device of pointer type universal meter

Abstract

The utility model discloses a protection device of a pointer type multimeter, which is characterized by comprising a multimeter main body, a dial plate arranged at the top of the multimeter main body, and a plurality of connecting plugs rotationally arranged at the top of the multimeter main body, and is characterized in that a plurality of fixing rods are fixedly arranged on two sides of the dial plate; the outer side of the dial plate is sleeved with a protective cover movably connected with the fixing rod, the top wall of the protective cover is hinged to a first cover plate, and a blocking strip is arranged on the side, close to the connecting position of the first cover plate and the protective cover, of the top of the protective cover. A protruding plate extending out of the protective cover is arranged on the side, away from the connecting position of the first cover plate and the protective cover, of the first cover plate. The fixing rods are arranged on the two sides of the dial plate, the outer side of the dial plate is sleeved with the protective cover movably connected with the fixing rods, and the top wall of the protective cover is hinged to the first cover plate, so that a complete dial plate protection structure is formed. The design can effectively protect the dial plate from being damaged by external collision, scraping and the like, so that the reading is prevented from being influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of universal meter, especially relates to a protective device of pointer type universal meter. BACKGROUND

[0002] The universal meter on the market includes digital display type universal meter and pointer type universal meter, the pointer type universal meter is as shown in the specification appendix Figure 1 The dial plate of this universal meter occupies a large proportion, and in order to read accurately, the dial plate is mostly transparent plastic.

[0003] After using this universal meter for a period of time, the dial plate is easily affected by external force such as friction and collision, so that scratches and cracks appear on the surface, and even the dial plate is broken. This condition not only affects the appearance of the dial plate, but more importantly, it interferes with the clarity and accuracy of the reading. For example, when measuring circuit parameters, if the surface of the dial plate is unclear, it is difficult for the technician to quickly and accurately read the value, thereby affecting the judgment of the circuit state and the troubleshooting of the fault. In addition, the wiring head of the pointer type universal meter is also easy to get dust, which causes poor contact during later use. Although some pointer type universal meters are provided with covers, knob covers or sleeve covers at the wiring head, the covers of this type need to be removed from the universal meter during use, and need to be re-covered after use. It is not only troublesome, but also easy to forget to cover the cover after use, resulting in the loss of the cover. SUMMARY

[0004] The utility model aims at the problems existing in the prior art, and provides a protective device of pointer type universal meter, which effectively protects the dial plate, thereby solving the problem that the dial plate is easily affected by friction and the surface is relatively blurred, affecting the reading.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a protective device of pointer type universal meter, including universal meter main part, the top of universal meter main part is equipped with dial plate, the top of universal meter main part is rotatably provided with a plurality of plug-in connectors, the both sides of dial plate are fixedly provided with a plurality of fixed rods, the outside of dial plate is equipped with the shroud that is movably connected with fixed rod, the top wall of shroud is hingedly connected with first cover plate, one side of the top of shroud and close to the connecting place of first cover plate and shroud is equipped with fender, the side of fender and first cover plate is embedded with first magnetic attraction strip, the top of first cover plate is embedded with second magnetic attraction strip that is mutually attracted with first magnetic attraction strip, one side of first cover plate away from the connecting place of first cover plate and shroud is provided with the convex plate that extends out of shroud.

[0006] The technical scheme has the following beneficial effects: the fixing rods are arranged on both sides of the dial plate, the shroud is sleeved outside the dial plate and movably connected with the fixing rods, and the first cover plate is hingedly connected to the top wall of the shroud, thereby forming a complete dial plate protection structure. This design can effectively protect the dial plate from damage caused by external collision and scratching, thereby avoiding affecting the reading. After the first cover plate is opened, the second magnetic strip can be attracted to the first magnetic strip on one side of the notch, thereby vertically fixing the first cover plate, so that the operator can read the reading when using the multimeter. Meanwhile, the protruding plate on the first cover plate can protrude out of the shroud when the cover plate is closed, so that the user can quickly find and open the cover plate, thereby improving the convenience of use.

[0007] Optionally, the bottom edges of the shroud are provided with clamping grooves adapted to the fixing rods, and the clamping grooves are composed of rectangular grooves and arc grooves, and the diameter of the arc grooves is greater than the width of the rectangular grooves.

[0008] In the technical scheme, the clamping grooves provided on the bottom edges of the shroud are composed of rectangular grooves and arc grooves, and the diameter of the arc grooves is greater than the width of the rectangular grooves. This clamping groove structure design enables the fixing rods to be more stably clamped in the shroud, preventing the shroud from falling off due to vibration or collision during use. The provision of the arc grooves also provides a certain movement space for the fixing rods, making the installation and disassembly of the shroud more flexible and convenient, and facilitating the user to clean or maintain the dial plate.

[0009] Optionally, the fixing rods are cylindrical rods, and the fixing rods include inner rods and rubber sleeves wrapped on the surfaces of the inner rods, and the outer diameter of the rubber sleeves is greater than the width of the rectangular grooves.

[0010] In the technical scheme, the fixing rods are designed as cylindrical rods and include inner rods and rubber sleeves wrapped on the surfaces of the inner rods, and the outer diameter of the rubber sleeves is greater than the width of the rectangular grooves. This improved fixing rod, on the one hand, increases the friction with the clamping grooves through the rubber sleeves, further improving the stability of the shroud; on the other hand, the rubber sleeves have a certain buffering effect, which can effectively absorb impact energy when the shroud is impacted by external force, reducing damage to the dial plate and enhancing the impact resistance of the multimeter.

[0011] Optionally, the top of the shroud is provided with a reading port adapted to the first cover plate, the inner walls on both sides of the reading port are fixedly installed with limiting strips, the limiting strips are elastic rubber strips, and the first cover plate is provided with limiting grooves corresponding to the limiting strips on both sides.

[0012] In the above technical solution, the reading port adapted to the first cover plate is arranged at the top of the shield, so that the user can clearly read the data on the dial when using the multimeter without being blocked by the shield. The limiting strips fixedly installed on the inner walls on both sides of the reading port are elastic rubber strips, which cooperate with the limiting grooves on both sides of the first cover plate to effectively limit the movement of the first cover plate, ensure that the cover plate tightly fits the shield when closed, and enhance the sealing performance and protection effect of the shield.

[0013] Optionally, the top of the multimeter body is provided with a dustproof assembly movably connected with the plug, the dustproof assembly comprises a fixed column fixed on the top of the multimeter column body, a first fixed plate is arranged on the top of the fixed column, a connecting column is fixedly arranged on the top of the first fixed plate, a torsional spring is sleeved on the outer side of the connecting column, a connecting plate is rotatably connected to the outer side of the connecting column, the two ends of the torsional spring are fixedly connected with the connecting plate and the connecting column respectively, a second cover plate is fixedly arranged on one end of the connecting plate, and a second fixed plate is fixedly arranged on the top of the connecting column.

[0014] In the above technical solution, when the multimeter is not in use, the elastic force of the torsional spring drives the connecting plate and the second cover plate to automatically cover the plug, preventing dust from entering the inside of the plug and protecting the cleanliness and conductivity of the plug. This design not only improves the dustproof ability of the multimeter, but also reduces the user's trouble of manually cleaning the plug, improves the user experience, and avoids the loss of the plug cover.

[0015] Optionally, a through hole is formed in the connecting plate, and the connecting column is located in the through hole.

[0016] Optionally, the diameter of the second cover plate is greater than the diameter of the plug, and a rubber pad is fixedly attached to the bottom of the second cover plate. The diameter of the second cover plate is greater than the diameter of the plug, ensuring that the second cover plate can completely cover the plug, providing more comprehensive dust protection. The rubber pad fixedly attached to the bottom of the second cover plate has good elasticity and sealing performance, which can further enhance the sealing effect between the second cover plate and the plug, prevent dust and moisture from entering, and improve the adaptability and reliability of the multimeter in harsh environments.

[0017] Optionally, an inner pad frame is arranged on the inner top wall of the shield, the inner pad frame is made of silica gel, and the thickness is between 0.3-0.5 cm, and a side of the first cover plate facing the dial is provided with a buffer cloth adapted to the dial.

[0018] In the above technical solution, the inner pad frame is used to separate the inner top wall of the shield from the dial, so that they do not directly contact each other. The inner pad frame supported by silica gel can provide a certain buffering effect for the dial, and the buffer cloth on the inner side of the first cover plate realizes double protection for the dial, effectively improving the protection effect of the dial.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting fixing rods on both sides of the dial, and sleeved with a protective cover that is movably connected to the fixing rods on the outside of the dial, and hinged to the top wall of the protective cover, a complete dial protection structure is formed. This design can effectively protect the dial from external collisions, scratches and other damage, thereby avoiding affecting the reading; 2. The protruding plate design on the first cover allows the cover to protrude from the protective cover when closed, making it convenient for users to quickly find and open the cover, improving ease of use; 3. The slots opened on the bottom edges of both sides of the protective cover are composed of rectangular slots and arc-shaped slots. The diameter of the arc-shaped slot is larger than the width of the rectangular slot. This allows the fixing rods to be more stably locked inside the protective cover, preventing the protective cover from falling off due to vibration or collision during use. The arc-shaped groove provides some space for the fixing rod, making the installation and removal of the cover more flexible and convenient, and facilitating user cleaning or maintenance of the dial; 4. The fixing rod is designed as a cylindrical rod, including an inner rod and a rubber sleeve wrapped around the surface of the inner rod. The outer diameter of the rubber sleeve is larger than the width of the rectangular groove. This design increases the friction with the slot through the rubber sleeve, further improving the stability of the cover; on the other hand, the rubber sleeve has a certain buffering effect, effectively absorbing impact energy when the cover is subjected to external impact, reducing damage to the dial, and enhancing the multimeter's impact resistance; 5. The limiting strips fixedly installed on the inner walls on both sides of the reading port are elastic rubber strips, which cooperate with the limiting grooves on both sides of the first cover plate to effectively limit the independent flipping of the first cover plate, ensuring that the cover plate fits tightly against the cover when closed, enhancing the sealing and protective effect of the cover; 6. When the multimeter is not in use, the spring force will drive the connecting plate and the second cover plate to automatically cover the connector, preventing dust from entering the connector and protecting the cleanliness and conductivity of the connector. This design not only improves the multimeter's dust resistance but also reduces the hassle of manually cleaning the connectors, enhancing the user experience and preventing the connector caps from being lost. Attached Figure Description

[0020] Figure 1 This represents the intent of a pointer-type universal pointer in the existing technology;

[0021] Figure 2 This is a side view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the separation structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection structure between the protective cover and the first cover plate of this utility model;

[0024] Figure 5 This is a schematic diagram showing the fixed rod and the slot in the separated state of this utility model;

[0025] Figure 6The utility model discloses a protective cover bottom view schematic drawing.

[0026] Figure 7 The utility model discloses a protective structure schematic drawing.

[0027] The utility model discloses a protective cover bottom view schematic drawing. Specific implementation

[0028] The technical scheme of the utility model will be described clearly and completely in connection with the drawings in the utility model, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the range of protection of the utility model.

[0029] In the description of the utility model, it is necessary to explain that the orientation or position relation of the terms "intermediate", "upper", "lower", "left", "right", "inner", "outer" and the like is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation of the utility model.

[0030] The application is suitable for the pointer type multimeter as Figure 1 The utility model discloses a protective cover bottom view schematic drawing.

[0031] The utility model discloses a protective cover bottom view schematic drawing. Figure 2The specific scheme of the embodiment is shown in Fig. 5, and is as follows: a protective device of a pointer-type multimeter, comprising a multimeter body 1, a dial plate 2 arranged on the top of the multimeter body 1, a rotatable mechanical zero adjustment arranged on the dial plate, a flat one-word opening arranged on the top of the mechanical zero adjustment, a flat-head screwdriver used by an operator to perform zero adjustment, a resistance zero adjustment column 3 rotatably arranged on the top of the multimeter body 1, a plurality of plug-in connectors 4 rotatably arranged on the top of the multimeter body 1 and used to connect test lines, an adjustment knob 5 rotatably arranged on the top of the multimeter body 1 and used to adjust gears, a plurality of fixed rods 6 fixedly arranged on both sides of the dial plate 2, a protective cover 7 movably sleeved on the outer side of the dial plate 2 and connected with the fixed rods 6, a first cover plate 8 hingedly connected to the top wall of the protective cover 7, a blocking strip 71 arranged on one side of the top of the protective cover 7 and close to the connection between the protective cover 7 and the first cover plate 8, a first magnetic strip embedded on the side of the blocking strip 71 facing the first cover plate 8, a second magnetic strip 81 embedded on the top of the first cover plate 8 and magnetically attracted to the first magnetic strip, and a protruding plate 9 arranged on the side of the first cover plate 8 away from the connection between the protective cover 7 and the first cover plate 8 and extending out of the protective cover 7.

[0032] The multimeter body 11 in the embodiment is of the MF47T type, and its structure and operation principle are both prior art, so the structure and operation principle are not described herein.

[0033] The above technical scheme forms a complete protective structure of the dial plate 2 by arranging the fixed rods 6 on both sides of the dial plate 2, sleeving the protective cover 7 movably connected with the fixed rods 6 on the outer side of the dial plate 2, and hingedly connecting the first cover plate 8 to the top wall of the protective cover 7. This design can effectively protect the dial plate 2 from damage caused by external collision and scratching, thereby avoiding affecting reading. Meanwhile, the protruding plate 9 on the first cover plate 8 is designed such that the cover plate can protrude out of the protective cover 7 when closed, so as to facilitate users to quickly find and open the cover plate, thereby improving the convenience of use. After the first cover plate 8 is opened, the second magnetic strip 81 can be magnetically attracted to the first magnetic strip on one side of the blocking strip 71, so as to vertically fix the first cover plate 8 for the operator to read when using the multimeter.

[0034] When using the multimeter, the first cover plate 8 is turned upward from the protruding plate 9 and flipped upward until the second magnetic strip 81 and the first magnetic strip are magnetically attracted together, so as to fix the first cover plate 8, and the pointer can be directly seen when reading. After use, the first cover plate 8 is closed again.

[0035] In this embodiment, the bottom edges of the two sides of the shield 7 are provided with clamping grooves matched with the fixing rod 6, the clamping grooves are composed of rectangular grooves and arc grooves, and the diameter of the arc grooves is greater than the width of the rectangular grooves. The clamping groove structure design makes the fixing rod 6 more stably clamped in the shield 7, preventing the shield 7 from falling off due to vibration or collision during use. The setting of the arc grooves also provides a certain space for the movement of the fixing rod 6, making the installation and disassembly of the shield 7 more flexible and convenient, and facilitating the user to clean or maintain the dial 2. At the same time, the fixing rod 6 is a cylindrical rod, which includes an inner rod and a rubber sleeve wrapped on the surface of the inner rod, and the outer diameter of the rubber sleeve is greater than the width of the rectangular groove. On the one hand, the rubber sleeve increases the friction with the clamping groove, further improving the stability of the shield 7; on the other hand, the rubber sleeve has a certain buffering effect, which can effectively absorb the impact energy when the shield 7 is impacted by external force, reducing the damage to the dial 2 and enhancing the impact resistance of the multimeter.

[0036] When the shield 7 is sleeved on the dial 2, the rectangular groove will extrude the rubber sleeve because the width of the rectangular groove is smaller than the diameter of the rubber sleeve, so that the rubber sleeve is deformed, allowing the fixing rod 6 to pass through the rectangular groove and reach the arc groove. After the fixing rod 6 reaches the arc groove, the rubber sleeve returns to its original state, forming a clamping state with the clamping groove, so that the shield 7 cannot be separated from the dial 2 without external force.

[0037] In this embodiment, the top of the shield 7 is provided with a reading port matched with the first cover plate 8, which allows the user to clearly read the data on the dial 2 when using the multimeter without being blocked by the shield 7. The two side inner walls of the reading port are fixedly installed with limiting strips 10, and the limiting strips 10 are elastic rubber strips. The two sides of the first cover plate 8 are provided with limiting grooves corresponding to the limiting strips 10, which can effectively limit the movement of the first cover plate 8 and ensure that the cover plate tightly fits the shield 7 when closed, enhancing the sealing and protection effect of the shield 7.

[0038] In this embodiment, the top of the shield 7 is also provided with a through port matched with the mechanical zero adjustment.

[0039] As shown in Figure 4 , Figure 6 , an inner pad frame 72 is arranged on the inner top wall of the shield 7, which is made of silica gel or soft rubber with a thickness of 0.3-0.5 cm. The inner pad frame separates the inner top wall of the shield from the dial, so that they do not directly contact each other. At the same time, the side of the first cover plate 8 facing the dial 2 is provided with a buffer cloth 82 matched with the dial 2. The buffer cloth 82 is made of soft or delicate cotton cloth or super fiber cloth, which realizes double protection of the dial in cooperation with the buffer cloth on the inner side of the first cover plate, effectively improving the protection effect of the dial.

[0040] As shown in Figure 7As shown, in this embodiment, a dustproof assembly is arranged on the top of the universal meter body 1 and movably connected with the plug 4 to protect the plug 4 from dust.

[0041] Specifically, the dustproof assembly comprises a fixing column 11 fixed on the top of the universal meter column, a first fixing plate 12 arranged on the top of the fixing column 11, a connecting column 13 fixed on the top of the first fixing plate 12, a torsion spring 14 sleeved on the outer side of the connecting column 13, a connecting plate 15 rotatably connected with the outer side of the connecting column 13, and a second cover plate 16 fixed on one end of the connecting plate 15, and a second fixing plate 17 fixed on the top of the connecting column 13.

[0042] When the universal meter is used, the second cover plate 16 is rotated to the horizontal direction, and the plug 4 is exposed, so that the plug of the measuring wire can be inserted into the plug 4. After the second cover plate 16 is rotated, the torsion spring 14 inside the connecting plate 15 is deformed due to the rotation of the connecting plate 15. When the universal meter is not used, the torsion spring 14 is reset, and the connecting plate 15 and the second cover plate 16 are automatically covered on the plug 4 under the elastic force of the torsion spring 14, so as to prevent dust from entering the inside of the plug 4 and protect the cleanliness and conductivity of the plug 4. The automatic cover design not only improves the dustproof ability of the universal meter, but also reduces the user's trouble of manually cleaning the plug 4, improves the use experience, and avoids the loss of the plug cover.

[0043] It should be noted that the connecting plate 15 is internally provided with a through hole, the connecting column 13 is arranged inside the through hole, the diameter of the second cover plate 16 is greater than the diameter of the plug 4, and the bottom of the second cover plate 16 is fixedly attached with a rubber pad. The diameter of the second cover plate 16 is greater than the diameter of the plug 4, so as to ensure that the second cover plate 16 can completely cover the plug 4 and provide more comprehensive dustproof protection. The rubber pad fixedly attached to the bottom of the second cover plate 16 has good elasticity and sealing property, which can further enhance the sealing effect between the second cover plate 16 and the plug 4, prevent dust and moisture from entering, and improve the adaptability and reliability of the universal meter in harsh environments.

[0044] The working principle of the above embodiment is that, during use, first, the shroud 7 is stably sleeved outside the dial plate 2 through cooperation of the fixing rods 6 on both sides of the dial plate 2 with the clamping grooves at the bottom edge of the shroud 7, wherein the rubber sleeves of the fixing rods 6 are extruded and deformed when passing through the rectangular grooves, and return to the original state after entering the arc-shaped grooves, thereby achieving firm clamping of the shroud 7 and effectively preventing damage to the dial plate 2 caused by external collision and scratching; when data needs to be read, the reading port at the top of the shroud 7 is designed to make the data of the dial plate 2 clear and visible, and the limiting grooves at both sides of the first cover plate 8 are in close cooperation with the elastic rubber strips limiting strips 10 on the inner wall of the reading port in the closed state, thereby enhancing the sealing property of the shroud 7; meanwhile, when the multimeter is not in use, the torsional spring 14 in the dustproof assembly at the top drives the connecting plate 15 and the second cover plate 16 to automatically cover the plug-in connector 4, the rubber pad at the bottom of the second cover plate 16 is in close contact with the plug-in connector 4, thereby preventing dust and moisture from entering, protecting the cleanliness and conductive property of the plug-in connector 4, and ensuring the reliability and durability of the multimeter in various environments.

[0045] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A protective device for a pointer-type multimeter, characterized in that, The device includes a multimeter body with a dial on top and multiple connectors rotatably mounted on the top. The dial has multiple fixed rods on both sides, a protective cover movably connected to the fixed rods is fitted around its outer side, a first cover plate is hinged to the top wall of the cover, a baffle is provided on the top of the cover near the connection between the first cover plate and the cover, a first magnetic strip is embedded in the baffle facing the first cover plate, a second magnetic strip is embedded in the top of the first cover plate and attracts the first magnetic strip, and a protruding plate extending beyond the cover is provided on the side of the first cover plate away from the connection with the cover.

2. The protective device for a pointer-type multimeter according to claim 1, characterized in that: The bottom edges on both sides of the protective cover are provided with slots that are adapted to the fixing rod. The slots are composed of rectangular slots and arc-shaped slots, and the diameter of the arc-shaped slots is larger than the width of the rectangular slots.

3. The protective device for a pointer-type multimeter according to claim 2, characterized in that: The fixing rod is a cylindrical rod, which includes an inner rod and a rubber sleeve wrapped around the surface of the inner rod. The outer diameter of the rubber sleeve is larger than the width of the rectangular groove.

4. The protective device for a pointer-type multimeter according to claim 1, characterized in that: The top of the protective cover has a reading port that is compatible with the first cover plate. Limiting strips are fixedly installed on the inner walls of both sides of the reading port. The limiting strips are elastic rubber strips. Limiting grooves corresponding to the limiting strips are opened on both sides of the first cover plate.

5. The protective device for a pointer-type multimeter according to claim 1, characterized in that: The top of the multimeter body is provided with a dustproof component that is movably connected to the connector. The dustproof component includes a fixing post fixed to the top of the multimeter body, a first fixing plate provided on the top of the fixing post, a connecting post fixedly provided on the top of the first fixing plate, a torsion spring sleeved on the outside of the connecting post, a connecting plate rotatably connected to the outside of the connecting post, the two ends of the torsion spring being fixedly connected to the connecting plate and the connecting post respectively, a second cover plate fixedly provided on one end of the connecting plate, and a second fixing plate fixedly provided on the top of the connecting post.

6. The protective device for a pointer-type multimeter according to claim 5, characterized in that: The connecting plate has a through hole inside, and the connecting post is located inside the through hole.

7. A protective device for a pointer-type multimeter according to claim 5, characterized in that: The diameter of the second cover plate is larger than the diameter of the connector, and a rubber pad is fixedly attached to the bottom of the second cover plate.

8. The protective device for a pointer-type multimeter according to claim 1, characterized in that: The inner top wall of the protective cover is provided with an inner pad frame, which is made of silicone and has a thickness of 0.3-0.5 cm. The side of the first cover plate facing the dial is provided with a cushioning cloth that is compatible with the dial.

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