Foldable caliper

Abstract

The utility model relates to the technical field of calipers, and discloses a foldable caliper which comprises a main scale, a vernier scale connected to the main scale in a sliding mode and a lengthened scale hinged to the end portion of the main scale, and a first measuring claw is hinged to the end, away from the lengthened scale, of the main scale. A second measuring claw is hinged to the end, close to the first measuring claw, of the vernier scale, and a clamping assembly is installed at the end, away from the second measuring claw, of the vernier scale. The clamping assembly comprises a sleeve piece fixed on the vernier scale and sleeved outside the main scale, a clamping cavity arranged in the sleeve piece and a pressing piece sliding in the clamping cavity, the bottom end of the pressing piece is attached to the outer surface of the main scale, and the sleeve piece is connected with a control assembly for controlling the pressing piece to ascend and descend relative to the sleeve piece. The vernier caliper has the following advantages and effects: the vernier caliper is convenient to slide to repeatedly and accurately read, and the measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of calipers, in particular to a foldable caliper. Background Art

[0002] A caliper is a measuring tool used to measure length, inner and outer diameters, and depth, and has the function of measurement and inspection. A measuring tool is an instrument used for measurement and inspection, and length measuring tools are one of its main categories, such as calipers, depth gauges, height gauges, micrometers, dial indicators, micrometers, gauge blocks, step gauges, angle rulers, inclinometers, etc. Calipers are one of the most important types of length measuring tools. The principle of a caliper is to use the difference between the line spacing on the main scale (referred to as line spacing) and the line spacing on the vernier scale to read the decimal part.

[0003] A Chinese patent with authorization announcement number CN212158362U discloses a portable caliper, including a main scale, a movable folding assembly and an extension scale, the surface of the main scale is engraved with scale values, and a vernier scale is installed on the outside of the main scale, a first locking bolt is arranged above the vernier scale, a scale head is integrally fixed to one side of the main scale, and a fixing ring is installed on one side of the scale head, the movable folding assembly is installed on the lower side of the scale head, the extension scale is installed on the other side of the rear of the main scale, and a sliding storage assembly is arranged between the extension scale and the main scale; the above device has the following disadvantages: the vernier scale is slid relative to the main scale to adjust the distance between the first measuring claw and the second measuring claw to read the reading, and when multiple readings are required, it is inconvenient to use the locking bolt to repeatedly fix for accurate reading. Utility Model Content

[0004] The utility model aims to provide a foldable caliper, which is convenient for sliding a vernier ruler to repeatedly and accurately read the data and improve the measuring efficiency.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a foldable caliper, comprising a main scale, a vernier scale slidably connected to the main scale and an extended scale hinged to the end of the main scale, the main scale being hinged with a first measuring claw at one end away from the extended scale, the vernier scale being hinged with a second measuring claw at one end close to the first measuring claw, a clamping assembly being installed at one end of the vernier scale away from the second measuring claw, the clamping assembly comprising a kit fixed to the vernier scale and sleeved on the outside of the main scale, a clamping cavity provided in the kit and a clamping piece sliding in the clamping cavity, the bottom end of the clamping piece being in contact with the outer surface of the main scale, and a control assembly for controlling the lifting and lowering of the clamping piece relative to the kit being connected to the kit.

[0006] By adopting the above technical solution, the control component controls the lifting and lowering of the pressing piece so that the pressing piece is pressed against the surface of the main scale or leaves the surface of the main scale, so that the vernier scale is fixed relative to the main scale or slides relative to the main scale. Therefore, when multiple readings are required, the vernier scale can be slid relative to the main scale at any time to adjust the distance between the first measuring claw and the second measuring claw to read the readings, thereby improving the convenience of use and the measurement efficiency.

[0007] The utility model is further configured as follows: a groove is provided in the middle of the clamping piece, the control assembly includes a control rod that slides at the bottom end of the kit and extends into the groove, a compression spring is fixed between the end of the control rod and the groove, first clamping grooves are provided on both sides of the control rod, second clamping grooves are provided on both sides of the clamping piece, a connecting piece is clamped between the first clamping groove and the second clamping groove, the connecting piece includes a clamping block, a central axis fixed to the middle of the clamping block and rotatably connected to the kit, and side axes fixed on both sides of the clamping block, and the two side axes are respectively embedded in the first clamping groove and the second clamping groove.

[0008] By adopting the above technical solution, when controlling the lifting and lowering of the clamping piece, the control rod is pressed, the bottom end of the control rod sinks into the groove, and at the same time, the control rod drives the side shaft on one side of the connecting piece to be pressed down through the first slot, and the entire connecting piece rotates around the central axis, so that the side shaft on the other side of the connecting piece is lifted up, and the clamping piece is driven to be lifted up through the second slot, and the clamping piece moves upward relative to the kit, and the bottom end leaves the main scale surface, so that the vernier scale can be slid relative to the main scale to adjust the distance between the first measuring claw and the second measuring claw to read the value; when the control rod is released, the control rod is lifted upward under the push of the compression spring, and at the same time, the control rod drives the side shaft on one side of the connecting piece to be lifted up through the first slot, and the side shaft on the other side of the connecting piece is pressed down, and the clamping piece is driven to be pressed down through the second slot, so that the bottom end of the clamping piece is pressed against the main scale surface, and the vernier scale and the main scale are relatively fixed, which is convenient for users to read and improves measurement accuracy.

[0009] The utility model is further configured as follows: the diameter of the side shaft is smaller than the diameter of the middle shaft.

[0010] By adopting the above technical solution, the entire connecting piece can rotate around the central axis, so that the side axes on both sides of the connecting piece can be pressed down and the other can be lifted, thereby controlling the lifting and lowering of the clamping piece relative to the sleeve.

[0011] The utility model is further configured as follows: the control rod comprises a rod head and a rod shaft, the rod head is located outside the kit, the rod shaft is inserted into the kit and then extends into the groove, and the diameter of the rod head is greater than the diameter of the rod shaft.

[0012] By adopting the above technical solution, the control rod is pressed to move up and down relative to the kit. The groove limits the up and down movement of the control rod by limiting the stroke of the rod body. The rod head limits the control rod as a whole to prevent the control rod from being separated from the kit as a whole, making the control clamping process more stable.

[0013] The utility model is further configured as follows: the pressing member is fixed with guide rods which are inserted and slidably connected to the kit and are located on both sides of the control rod.

[0014] By adopting the above technical solution, when the clamping piece moves up and down relative to the sleeve, the guide rod realizes limiting guidance, so that the process of the clamping piece moving up and down is more stable.

[0015] The utility model is further configured as follows: a connecting plate is fixed between the two guide rods, and a movable opening is provided on the connecting plate for the control rod to be inserted.

[0016] By adopting the above technical solution, the connecting plate restricts the guide rod and the pressing member from being separated from the sleeve, so that the guide rod and the pressing member can always move up and down relative to the sleeve.

[0017] The utility model is further configured as follows: a limiting plate is fixed on one side of the extended ruler close to the main ruler, and a limiting groove is provided on the side of the main ruler for the limiting plate to be embedded in.

[0018] By adopting the above technical solution, the extended ruler is flipped relative to the main ruler so that the limit plate is embedded in the limit groove, thereby extending the measuring distance of the caliper. When not in use, the extended ruler is flipped so that the extended ruler and the main ruler are folded relative to each other for easy carrying and storage, which is more convenient to use.

[0019] The utility model is further configured as follows: locking rods are slidably disposed at both ends of the main ruler, and locking grooves for inserting the ends of the locking rods are disposed on the side of the limit plate and the extension ruler away from the limit plate.

[0020] By adopting the above technical solution, when the caliper length needs to be extended, the extension ruler is flipped relative to the main ruler, the limit plate is embedded in the limit groove, and then the end of the locking rod is embedded in the locking groove to complete the relative fixation of the main ruler and the extension ruler, which is convenient for measurement; when it needs to be stored, the extension ruler is flipped relative to the main ruler, the backs of the extension ruler and the main ruler are folded together, and the end of the locking rod at the other end of the main ruler is embedded in the locking groove to complete the relative fixation of the main ruler and the extension ruler, which is convenient for carrying.

[0021] The utility model is further configured as follows: the main ruler is provided with a notch for the locking rod to be inserted and slid, a fixing plate is fixed to the end of the locking rod, and a locking spring sleeved on the outside of the locking rod is fixed between the fixing plate and the main ruler.

[0022] By adopting the above technical solution, the extension ruler is flipped after pulling the locking rod, so that the extension ruler and the main ruler are in a horizontal or folded state, and then the locking rod is released. The locking rod is pulled by the locking spring and the lower end is embedded in the locking groove, thereby achieving relative fixation of the main ruler and the extension ruler.

[0023] The utility model is further configured as follows: protrusions are provided on both sides of the main ruler, and sliding grooves for the protrusions to slide are provided on both sides of the kit.

[0024] By adopting the above technical solution, when the vernier scale slides relative to the main scale, the protrusion is embedded in the slide groove to limit the travel of the vernier scale and the kit, making the sliding adjustment process more stable.

[0025] The beneficial effects of the utility model are:

[0026] 1. The control component controls the lifting and lowering of the pressing piece so that the pressing piece is pressed against the main scale surface or leaves the main scale surface, so that the vernier scale is fixed relative to the main scale or slides relative to the main scale. When multiple readings are required, the vernier scale can be slid relative to the main scale at any time to adjust the distance between the first measuring claw and the second measuring claw to read the readings, thereby improving the convenience of use and the measurement efficiency;

[0027] 2. When the caliper length needs to be extended, flip the extension ruler relative to the main ruler, embed the limit plate into the limit groove, and then embed the end of the locking rod into the locking groove to complete the relative fixation of the main ruler and the extension ruler, which is convenient for measurement; when it needs to be stored, flip the extension ruler relative to the main ruler, fold the back of the extension ruler and the main ruler together, and embed the end of the locking rod at the other end of the main ruler into the locking groove to complete the relative fixation of the main ruler and the extension ruler, which is convenient for carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the utility model.

[0030] Figure 2 It is a schematic diagram of the connection relationship between the set, the pressing piece and the control component in the utility model.

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0032] Figure 4 yes Figure 3 Enlarged view of point A.

[0033] In the figure, 1, main ruler; 2, vernier ruler; 3, extension ruler; 4, first measuring claw; 5, second measuring claw; 6, clamping assembly; 61, kit; 62, clamping chamber; 63, clamping member; 64, control assembly; 641, control rod; 641a, rod head; 641b, rod body; 642, compression spring; 643, first clamping groove; 644, second clamping groove; 645, connecting member; 645a, clamping block; 645b, middle axis; 645c, side axis; 65, groove; 66, guide rod; 67, connecting plate; 68, movable opening; 7, limit plate; 8, limit groove; 9, locking rod; 10, locking groove; 11, fixing plate; 12, notch; 13, locking spring; 14, protrusion; 15, slide groove. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Embodiment 1, a foldable caliper, such as Figure 1 , Figure 2 As shown, it includes a main scale 1, a vernier scale 2 slidably connected to the main scale 1, and an extended scale 3 hinged to the end of the main scale 1, the main scale 1 is hinged with a first measuring claw 4 at one end away from the extended scale 3, the vernier scale 2 is hinged with a second measuring claw 5 at one end close to the first measuring claw 4, and a clamping assembly 6 is installed at the end of the vernier scale 2 away from the second measuring claw 5. The clamping assembly 6 includes a kit 61 fixed to the vernier scale 2 and sleeved on the outside of the main scale 1, a clamping cavity 62 provided in the kit 61, and a clamping piece 63 sliding in the clamping cavity 62, the bottom end of the clamping piece 63 is in contact with the outer surface of the main scale 1, and the kit 61 is connected to a control assembly 64 for controlling the lifting and lowering of the clamping piece 63 relative to the kit 61.

[0036] like Figure 2 As shown, a groove 65 is provided in the middle of the clamping member 63, and the control component 64 includes a control rod 641 that slides on the bottom end of the sleeve 61 and extends into the groove 65, a compression spring 642 is fixed between the end of the control rod 641 and the groove 65, first clamping grooves 643 are provided on both sides of the control rod 641, and second clamping grooves 644 are provided on both sides of the clamping member 63, and a connecting member 645 is clamped between the first clamping groove 643 and the second clamping groove 644, and the connecting member 645 includes a clamping block 645a, a central axis 645b fixed to the middle of the clamping block 645a and rotatably connected to the sleeve 61, and side axes 645c fixed to both sides of the clamping block 645a, and the two side axes 645c are respectively embedded in the first clamping groove 643 and the second clamping groove 644.

[0037] Furthermore, the diameter of the side shaft 645c is smaller than the diameter of the middle shaft 645b.

[0038] Furthermore, the control rod 641 includes a rod head 641a and a rod shaft 641b. The rod head 641a is located outside the kit 61, and the rod shaft 641b is inserted into the kit 61 and extends into the groove 65. The diameter of the rod head 641a is greater than the diameter of the rod shaft 641b.

[0039] Furthermore, the pressing member 63 is fixed with guide rods 66 which are inserted and slidably connected to the sleeve 61 and are located on both sides of the control rod 641 .

[0040] Furthermore, a connecting plate 67 is fixed between the two guide rods 66 , and a movable opening 68 for the control rod 641 to pass through is provided on the connecting plate 67 .

[0041] like Figure 1 , Figure 4 As shown, a limit plate 7 is fixed to the side of the extension ruler 3 close to the main ruler 1, and a limit groove 8 for the limit plate 7 to be embedded in the side of the main ruler 1 is provided.

[0042] Furthermore, locking rods 9 are slidably provided at both ends of the main ruler 1, and locking grooves 10 for inserting the ends of the locking rods 9 are provided on the side of the limit plate 7 and the extension ruler 3 away from the limit plate 7.

[0043] Furthermore, the main ruler 1 is provided with a slot 12 for the locking rod 9 to be inserted and slid, a fixing plate 11 is fixed to the end of the locking rod 9, and a locking spring 13 which is sleeved on the outside of the locking rod 9 is fixed between the fixing plate 11 and the main ruler 1.

[0044] Furthermore, protrusions 14 are provided on both sides of the main ruler 1, and sliding grooves 15 for the protrusions 14 to slide are provided on both sides of the sleeve 61.

[0045] The working principle of the utility model is as follows: when it is necessary to slide the vernier ruler 2 relative to the main ruler 1 to adjust the spacing between the first measuring claw 4 and the second measuring claw 5 to read the value, the control rod 641 is pressed, the bottom end of the control rod 641 sinks into the groove 65, and at the same time, the control rod 641 drives the side shaft 645c on one side of the connecting member 645 to press down through the first clamping groove 643, and the entire connecting member 645 rotates around the central axis 645b, so that the side shaft 645c on the other side of the connecting member 645 is lifted up, and the pressing member 63 is lifted up through the second clamping groove 644, and the pressing member 63 moves upward relative to the sleeve 61, and the bottom end leaves the surface of the main ruler 1, and the guide rod 66 realizes the guidance, so that the vernier ruler 2 can be slid relative to the main ruler 1 to adjust the spacing between the first measuring claw 4 and the second measuring claw 5 to read the value; when the control rod 641 is released, the control rod 641 is lifted up under the push of the compression spring 642, and at the same time, the control rod 641 is lifted up through the first clamping groove 644. The groove 643 drives the side shaft 645c on one side of the connecting member 645 to lift up, and the side shaft 645c on the other side of the connecting member 645 is pressed down, and the pressing member 63 is pressed down through the second clamping groove 644, so that the bottom end of the pressing member 63 is pressed against the surface of the main scale 1, and the vernier scale 2 and the main scale 1 are relatively fixed, which is convenient for users to read and improves the measurement accuracy; when it is necessary to extend the length of the caliper, the locking rod 9 is pulled to flip the extended scale 3 relative to the main scale 1, and the limit plate 7 is embedded in the limit groove 8, and then the end of the locking rod 9 is embedded in the locking groove 10 to complete the relative fixation of the main scale 1 and the extended scale 3, which is convenient for measurement; when it is necessary to store it, the locking rod 9 is pulled to flip the extended scale 3 relative to the main scale 1, so that the backs of the extended scale 3 and the main scale 1 are folded together, and the end of the locking rod 9 at the other end of the main scale 1 is embedded in the locking groove 10 to complete the relative fixation of the main scale 1 and the extended scale 3, which is convenient for carrying.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable caliper, comprising a main scale (1), a vernier scale (2) slidably connected to the main scale (1), and an extension scale (3) hinged to the end of the main scale (1), characterized in that: The end of the main scale (1) away from the extension scale (3) is hinged with a first measuring claw (4), the end of the vernier scale (2) close to the first measuring claw (4) is hinged with a second measuring claw (5), and the end of the vernier scale (2) away from the second measuring claw (5) is equipped with a clamping assembly (6), the clamping assembly (6) comprising a sleeve (61) fixed to the vernier scale (2) and sleeved on the outside of the main scale (1), a clamping cavity (62) arranged in the sleeve (61) and a clamping member (63) sliding in the clamping cavity (62), the bottom end of the clamping member (63) is in contact with the outer surface of the main scale (1), and the sleeve (61) is connected to a control assembly (64) for controlling the lifting and lowering of the clamping member (63) relative to the sleeve (61).

2. A foldable caliper according to claim 1, characterized in that: A groove (65) is provided in the middle of the clamping member (63), and the control assembly (64) comprises a control rod (641) which slides at the bottom end of the sleeve (61) and extends into the groove (65), a compression spring (642) is fixed between the end of the control rod (641) and the groove (65), first grooves (643) are provided on both sides of the control rod (641), and second grooves (644) are provided on both sides of the clamping member (63), and the first grooves ( A connecting piece (645) is clamped between the first clamping slot (643) and the second clamping slot (644), and the connecting piece (645) comprises a clamping block (645a), a central axis (645b) fixed to the middle of the clamping block (645a) and rotatably connected to the kit (61), and side axes (645c) fixed to both sides of the clamping block (645a), and the two side axes (645c) are respectively embedded in the first clamping slot (643) and the second clamping slot (644).

3. A foldable caliper according to claim 2, characterized in that: The diameter of the side shaft (645c) is smaller than the diameter of the middle shaft (645b).

4. A foldable caliper according to claim 2, characterized in that: The control rod (641) comprises a rod head (641a) and a rod shaft (641b); the rod head (641a) is located outside the kit (61); the rod shaft (641b) is inserted into the kit (61) and then extends into the groove (65); the diameter of the rod head (641a) is greater than the diameter of the rod shaft (641b).

5. A foldable caliper according to claim 4, characterized in that: The pressing member (63) is fixed with guide rods (66) which are inserted and slidably connected to the sleeve (61) and are located on both sides of the control rod (641).

6. A foldable caliper according to claim 5, characterized in that: A connecting plate (67) is fixed between the two guide rods (66), and a movable opening (68) for the control rod (641) to pass through is provided on the connecting plate (67).

7. A foldable caliper according to claim 1, characterized in that: A limiting plate (7) is fixed to one side of the extended ruler (3) close to the main ruler (1), and a limiting groove (8) is provided on the side of the main ruler (1) for the limiting plate (7) to be embedded.

8. A foldable caliper according to claim 7, characterized in that: Locking rods (9) are slidably provided at both ends of the main ruler (1), and locking grooves (10) for inserting the ends of the locking rods (9) are provided on the side of the limit plate (7) and the extension ruler (3) away from the limit plate (7).

9. A foldable caliper according to claim 8, characterized in that: The main ruler (1) is provided with a notch (12) for the locking rod (9) to be inserted and slid, a fixing plate (11) is fixed to the end of the locking rod (9), and a locking spring (13) sleeved on the outside of the locking rod (9) is fixed between the fixing plate (11) and the main ruler (1).

10. The foldable caliper according to claim 1, characterized in that: The main ruler (1) is provided with protrusions (14) on both sides, and the sleeve (61) is provided with sliding grooves (15) for the protrusions (14) to slide on both sides.

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