Angle metering device convenient to carry

Abstract

The invention discloses an angle metering device convenient to carry, which relates to the technical field of angle metering and comprises a first measuring ruler plate, a second measuring ruler plate, a fixing cylinder, a limiting ring sleeve, a display screen, a tightness adjusting mechanism, a lubricating mechanism, an extension and contraction mechanism and an extension ruler plate. The tightness adjusting mechanism adjusts the rotation tightness between the first measuring ruler plate and the second measuring ruler plate, during angle measurement, the first measuring ruler plate and the second measuring ruler plate abut against the two sides of an object to be measured respectively, the measured angle is displayed through the display screen, and the lubricating mechanism adds lubricating oil to the limiting ring sleeve. During angle measurement, the extension and contraction mechanism drives the extension ruler plate to move to extend the measuring device body, so that a user can hold the measuring device body conveniently for measurement, and during storage, the extension and contraction mechanism drives the extension ruler plate to move to shorten the measuring device body, so that the measuring device body can be stored conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of angle measurement, and in particular to an angle measurement device that is convenient to carry. Background Art

[0002] Angle measuring devices are instruments used to measure angles. In life and work, there are many places where we need to measure the angles of inclined surfaces, arc surfaces, plumb lines and horizontal planes. We need angle measuring devices to measure angles. In order to improve the measurement accuracy, people often use electronic angle measuring devices to measure angles.

[0003] The existing angle measuring devices have a fixed length, and their long length makes them inconvenient to carry and easy to collide with other objects and cause damage. Therefore, there is an urgent need for an angle measuring device that is easy to carry to solve the above problem. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a portable angle measuring device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A portable angle measuring device comprises a first measuring scale plate and a second measuring scale plate, wherein the first measuring scale plate is connected to a fixing cylinder, the fixing cylinder is connected to a limiting ring sleeve, a rotating groove is provided on the second measuring scale plate, a cavity is provided on the second measuring scale plate, the limiting ring sleeve is rotatably engaged with the rotating groove on the second measuring scale plate, and a display screen is provided on the second measuring scale plate, and further comprises: A tension adjustment mechanism, one end of which is connected to the measuring scale plate 1 and the other end of which is in contact with the measuring scale plate 2, and is used to adjust the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2. The tension adjustment mechanism comprises: a threaded rod, which is connected to the measuring scale plate 1 and is arranged inside the fixed cylinder; a threaded cover plate, a threaded cylinder is arranged at the center of the bottom of the threaded cover plate, the threaded cylinder is threadedly connected to the threaded rod, and a slide groove 1 is arranged on the threaded cover plate; an extrusion assembly, the top end of which is connected to the threaded cover plate and the bottom end of which is in contact with the measuring scale plate 2; a positioning assembly, one end of which is connected to the threaded cover plate and the other end of which is in contact with the inner wall of the fixed cylinder; A lubricating mechanism, connected to the second measuring scale plate, for adding lubricating oil between the fixed cylinder and the limiting ring sleeve; The retracting mechanism is provided with two groups, one end of the retracting mechanism of one group is connected to the measuring scale plate 1, and the other end of the retracting mechanism of the other group is connected to the measuring scale plate 2; The extension ruler plate is provided with two groups and is respectively connected to the other end of the two groups of the extension and retraction mechanisms.

[0006] As a further solution of the present invention: the extrusion assembly comprises: A telescopic straight rod, the top end of which is connected to a threaded cover plate; An abutment ring connected to the bottom end of the telescopic straight rod and abutting against the second measuring ruler plate; The elastic member 1 is sleeved on the telescopic straight rod, and one end of the elastic member is connected to the threaded cover plate, and the other end of the elastic member is connected to the abutting ring.

[0007] As a further solution of the present invention: the positioning component includes: A sliding folding plate is slidably connected with a sliding groove on the threaded cover plate; A limiting arc plate is connected to the bottom end of the sliding folding plate, and the limiting arc plate is located inside the fixed cylinder and abuts against the inner wall of the fixed cylinder; Press the round block to connect with the top of the sliding flap; The second elastic member has one end connected to the sliding folding plate and the other end connected to the threaded cylinder on the threaded cover plate.

[0008] As a further solution of the present invention: the lubrication mechanism comprises: A connecting tube connected to the second measuring ruler plate; An oil inlet pipe is connected to the connecting tube and communicated with the interior thereof, wherein a one-way valve 1 is provided in the oil inlet pipe; Press the slide bar to penetrate one end of the oil inlet pipe and slide it to connect with it; A piston block is disposed inside the connecting tube and is slidably connected to the inner wall thereof, and the piston block is connected to the pressing slide rod; The connecting cavity is arranged inside the second measuring scale plate and is communicated with the inside of the connecting cylinder. The connecting cavity is communicated with the rotating groove and the inside of the cavity.

[0009] As a further solution of the present invention: the extension and contraction mechanism comprises: Sliding grooves, wherein the sliding grooves are provided in two groups, one group of the sliding grooves is opened on the measuring ruler plate 1, and the other group of the sliding grooves is opened on the measuring ruler plate 2; A sliding sleeve block is slidably connected with the sliding groove; A sliding block is slidably engaged with the sliding sleeve block, and a second sliding groove is provided on the sliding block; A limit block connected to the sliding sleeve block and slidably abutting against the second sliding groove; A fixed component 1, one end of which is connected to the sliding sleeve block, and the other end of which is connected to the sliding groove; The fixing component 2 has one end connected to the measuring scale plate 1 and the measuring scale plate 2, and the other end connected to the extension scale plate.

[0010] As a further solution of the present invention: the fixing component 1 includes: Magnetic block 1, connected with the sliding sleeve block; The second magnetic block is connected to the sliding groove and is located at one end close to the fixed cylinder. The magnetic properties of the second magnetic block are opposite to those of the first magnetic block.

[0011] As a further solution of the present invention: the second fixing component comprises: Magnetic block three, the magnetic block three is provided with two groups, one group of magnetic block three is connected to the measuring scale plate one, and the other group of magnetic block three is connected to the measuring scale plate two, and the magnetic block three is located at one end away from the fixed cylinder; Magnetic block four is connected to the extended ruler plate. The magnetic properties of magnetic block four are opposite to those of magnetic block three. Magnetic block four is located at one end close to the fixed cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The tension adjustment mechanism adjusts the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2. When measuring the angle, the measuring scale plate 2 is rotated so that the measuring scale plate 1 and the measuring scale plate 2 are respectively in contact with the two sides of the object to be measured, and the measured angle is displayed on the display screen. The lubrication mechanism adds lubricating oil between the fixed cylinder and the limit ring sleeve to ensure the smoothness of the rotation between the measuring scale plate 1 and the measuring scale plate 2. When measuring the angle, the extension and retraction mechanism drives the extension scale plate to move, and extends the measuring device body to facilitate the user to hold it for measurement. When storing, the extension and retraction mechanism drives the extension scale plate to move, and shortens the measuring device body to facilitate its storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a portable angle measuring device in an embodiment of the present invention.

[0014] Figure 2 It is a schematic structural diagram of a portable angle measuring device in a measuring state according to an embodiment of the present invention.

[0015] Figure 3 It is a schematic structural diagram of a portable angle measuring device in a stored state according to an embodiment of the present invention.

[0016] Figure 4 It is a partial cross-sectional view of a portable angle measuring device according to an embodiment of the present invention.

[0017] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0018] Figure 6 It is a schematic diagram of the structural disassembly of the tension adjustment mechanism in an embodiment of the present invention.

[0019] Figure 7 It is a schematic diagram of the structural disassembly of the extension and retraction mechanism in an embodiment of the present invention.

[0020] In the figure: 1- measuring ruler plate 1; 2- fixing tube; 3- limiting ring sleeve; 4- measuring ruler plate 2; 5- display screen; 6- tension adjustment mechanism; 7- lubrication mechanism; 8- extension mechanism; 9- extension ruler plate; 10- rolling ball; 61- threaded rod; 62- threaded cover plate; 63- extrusion assembly; 64- positioning assembly; 631- telescopic straight rod; 632- abutment ring; 633- elastic member 1; 641- sliding folding plate; 642-limiting arc plate; 643-pressing round block; 644-elastic member 2; 71-connecting cylinder; 72-oil inlet pipe; 73-pressing slide rod; 74-piston block; 75-connecting cavity; 81-sliding groove; 82-sleeve block; 83-sliding block; 84-limiting block; 85-fixing component 1; 86-fixing component 2; 851-magnetic block 1; 852-magnetic block 2; 861-magnetic block 3; 862-magnetic block 4. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the embodiment of the present invention, please refer to Figures 1 to 7 A portable angle measuring device comprises a measuring scale plate 1 and a measuring scale plate 2 4, wherein the measuring scale plate 1 is connected to a fixing tube 2, the fixing tube 2 is connected to a limiting ring sleeve 3, a rotating groove is provided on the measuring scale plate 2 4, a cavity is provided on the measuring scale plate 2 4, the limiting ring sleeve 3 is rotatably connected with the rotating groove on the measuring scale plate 2 4, and a display screen 5 is provided on the measuring scale plate 2 4, and further comprises: The tension adjustment mechanism 6 has one end connected to the measuring scale plate 1 and the other end abutting against the measuring scale plate 2 4, and is used to adjust the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2 4. The tension adjustment mechanism 6 includes: a threaded rod 61 connected to the measuring scale plate 1, and the threaded rod 61 is arranged inside the fixed tube 2; a threaded cover plate 62, a threaded tube is arranged at the bottom center of the threaded cover plate 62, and the threaded tube is threadedly connected to the threaded rod 61, and a slide groove 1 is arranged on the threaded cover plate 62; an extrusion component 63, the top end of which is connected to the threaded cover plate 62, and the bottom end abuts against the measuring scale plate 2 4; a positioning component 64, one end of which is connected to the threaded cover plate 62, and the other end abuts against the inner wall of the fixed tube 2; A lubricating mechanism 7, connected to the measuring ruler plate 2 4, for adding lubricating oil between the fixing cylinder 2 and the limiting ring sleeve 3; The retracting mechanism 8 is provided with two groups, one end of the retracting mechanism 8 of one group is connected to the measuring scale plate 1, and the other end of the retracting mechanism 8 of the other group is connected to the measuring scale plate 2 4; The extension ruler plate 9 is provided with two groups, and is respectively connected to the other end of the two groups of the extension and retraction mechanisms 8.

[0023] The tension adjustment mechanism 6 adjusts the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2 4. When measuring the angle, the measuring scale plate 2 4 is rotated so that the measuring scale plate 1 and the measuring scale plate 2 4 are respectively in contact with the two sides of the object to be measured, and the measured angle is displayed on the display screen 5. The lubricating mechanism 7 adds lubricating oil between the fixed cylinder 2 and the limit ring sleeve 3 to ensure the smoothness of the rotation between the measuring scale plate 1 and the measuring scale plate 2 4. When measuring the angle, the extension and retraction mechanism 8 drives the extension scale plate 9 to move, and extends the measuring device body to facilitate the user to hold it for measurement. When storing, the extension and retraction mechanism 8 drives the extension scale plate 9 to move, and shortens the measuring device body to facilitate its storage.

[0024] As an embodiment of the present invention, please refer to Figures 4 to 6 , the extrusion assembly 63 comprises: The top end of the telescopic straight rod 631 is connected to the threaded cover plate 62; The abutment ring 632 is connected to the bottom end of the telescopic straight rod 631 and abuts against the measuring ruler plate 24; The elastic member 1 633 is sleeved on the telescopic straight rod 631 , and one end of the elastic member 633 is connected to the threaded cover plate 62 , and the other end of the elastic member 633 is connected to the abutting ring 632 .

[0025] In the initial state, the elastic member 1 633 is in a compressed state. When adjusting the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2 4, the position limit of the positioning assembly 64 on the threaded cover plate 62 is released, and the threaded cover plate 62 is rotated. The threaded cover plate 62 rotates and moves longitudinally, thereby driving the elastic member 1 633 to move, and the deformation of the elastic member 1 633 is adjusted, thereby adjusting the extrusion force of the elastic member 1 633, thereby adjusting the friction between the abutment ring 632 and the measuring scale plate 2 4, so as to achieve the purpose of adjusting the rotational tightness between the measuring scale plate 1 and the measuring scale plate 2 4. The elastic member 1 633 can be a spring, a spring sheet, etc.

[0026] As an embodiment of the present invention, please refer to Figures 1 to 6 , the positioning component 64 includes: The sliding folding plate 641 is slidably connected with a sliding groove on the threaded cover plate 62; The limiting arc plate 642 is connected to the bottom end of the sliding folding plate 641, and the limiting arc plate 642 is located inside the fixed cylinder 2 and abuts against the inner wall of the fixed cylinder 2; The pressing round block 643 is connected to the top of the sliding folding plate 641; The second elastic member 644 has one end connected to the sliding folding plate 641 and the other end connected to the threaded tube on the threaded cover plate 62 .

[0027] When the second elastic member 644 is in a compressed state, the limiting arc plate 642 abuts against the inner wall of the fixed cylinder 2 to prevent the abutting ring 632 from rotating when the measuring scale plate 24 rotates, thereby preventing the threaded cover plate 62 from rotating. When the threaded cover plate 62 needs to be rotated, the pressing round block 643 is pressed, and the pressing round block 643 drives the sliding folding plate 641 to move, so that the limiting arc plate 642 is separated from the fixed cylinder 2, and the limiting of the threaded cover plate 62 is released. The second elastic member 644 can be a spring, a spring sheet, etc.

[0028] In this embodiment, the side of the limiting arc plate 642 abutting against the fixed cylinder 2 is provided with anti-skid grooves or anti-skid pads to increase the friction between the limiting arc plate 642 and the fixed cylinder 2 .

[0029] As an embodiment of the present invention, please refer to Figures 1 to 5 , the lubrication mechanism 7 comprises: A connecting tube 71 is connected to the measuring ruler plate 24; The oil inlet pipe 72 is connected to the connecting tube 71 and communicates with the interior thereof, and a one-way valve 1 is provided in the oil inlet pipe 72; Press the slide bar 73 to penetrate one end of the oil inlet pipe 72 and be slidably connected thereto; The piston block 74 is disposed inside the connecting tube 71 and is slidably connected to the inner wall thereof. The piston block 74 is connected to the pressing slide rod 73; The connecting cavity 75 is provided inside the measuring scale plate 24 and communicates with the inside of the connecting tube 71. The connecting cavity 75 communicates with the rotating groove and the inside of the cavity.

[0030] Lubricating oil is poured into the connecting tube 71 from the oil inlet pipe 72. When lubrication is needed, the pressing slide rod 73 is pressed. The pressing slide rod 73 drives the piston block 74 to move. The piston block 74 squeezes the lubricating oil and presses the lubricating oil into the connecting cavity 75. Then, the lubricating oil flows into the cavity and the rotating groove to lubricate the limit ring sleeve 3 and the measuring scale plate 4. The rolling ball 10 can also be lubricated to ensure smooth rotation.

[0031] As an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 , the extension and contraction mechanism 8 comprises: Sliding grooves 81, wherein the sliding grooves 81 are provided in two groups, one group of the sliding grooves 81 is provided on the measuring ruler plate 1, and the other group of the sliding grooves 81 is provided on the measuring ruler plate 2 4; The sliding sleeve block 82 is slidably connected with the sliding groove 81; The sliding block 83 is slidably engaged with the sliding sleeve block 82, and the sliding block 83 is provided with a second sliding groove; The limit block 84 is connected to the sliding block 82 and is in sliding contact with the second sliding groove; A fixing component 85, one end of which is connected to the sliding sleeve block 82, and the other end of which is connected to the sliding groove 81; The second fixing component 86 has one end connected to the measuring scale plate 1 and the measuring scale plate 2 4 , and the other end connected to the extension scale plate 9 .

[0032] When storing, the extended ruler 9 moves longitudinally so that the sliding block 83 abuts against the limit block 84, and then the extended ruler 9 moves transversely so that the extended ruler 9 abuts against the side of the measuring ruler 1 and the measuring ruler 2 4 away from each other, and the fixing component 1 85 fixes the sliding block 82, thereby fixing the extended ruler 9, reducing the overall length of the measuring device for easy storage. At the same time, the extended ruler 9 can also protect the display screen 5 to prevent the display screen 5 from being scratched; when measuring, the extended ruler 9 moves transversely and then moves longitudinally so that the extended ruler 9 abuts against the end of the measuring ruler 1 and the measuring ruler 2 4 away from the fixed tube 2, and the fixing component 2 86 fixes the extended ruler 9. The longer measuring device is convenient for the user to hold for measurement.

[0033] In this embodiment, a limiting block is provided in the sliding groove 81 to limit the maximum sliding distance of the sliding sleeve block 82 .

[0034] As an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 7 , the fixing assembly 85 comprises: Magnetic block 1 851, connected to the sliding block 82; The second magnetic block 852 is connected to the sliding groove 81 and is located at one end close to the fixed cylinder 2 . The second magnetic block 852 has opposite magnetic properties to the first magnetic block 851 .

[0035] The first magnetic block 851 and the second magnetic block 852 are magnetically attracted together to fix the sliding sleeve block 82 .

[0036] As an embodiment of the present invention, please refer to Figures 1 to 3 , the second fixing assembly 86 comprises: Magnetic block three 861, the magnetic block three 861 is provided with two groups, one group of the magnetic block three 861 is connected to the measuring scale plate one 1, and the other group of the magnetic block three 861 is connected to the measuring scale plate two 4, and the magnetic block three 861 is located at one end away from the fixed tube 2; Magnetic block four 862 is connected to the extended ruler plate 9. The magnetic properties of magnetic block four 862 and magnetic block three 861 are opposite. Magnetic block four 862 is located at one end close to the fixed tube 2.

[0037] The magnetic block three 861 and the magnetic block four 862 are magnetically attracted together to fix the extended ruler plate 9.

[0038] As an embodiment of the present invention, please refer to Figure 4 and Figure 5 , also includes: The rolling ball 10 is arranged in the cavity of the measuring scale plate 24 and is rotatably connected to the measuring scale plate 24 and is located on the upper and lower sides of the measuring scale plate 24. The rolling ball 10 located at the bottom is rotatably engaged with the measuring scale plate 1, and the rolling ball 10 located at the top is rotatably engaged with the bottom of the abutment ring 632.

[0039] The rolling balls 10 are arranged to ensure that the measuring scale plate 1 and the measuring scale plate 2 4 can rotate smoothly and stably.

[0040] The working principle of the present invention is as follows: in the initial state, the elastic member 644 is in a compressed state, and the limiting arc plate 642 abuts against the inner wall of the fixed cylinder 2 to prevent the abutting ring 632 from rotating when the measuring scale plate 4 rotates, thereby preventing the threaded cover plate 62 from rotating. When the rotation tightness between the measuring scale plate 1 and the measuring scale plate 2 is adjusted, the pressing round block 643 is pressed, and the pressing round block 643 drives the sliding folding plate 641 to move, so that the limiting arc plate 642 is separated from the fixed cylinder 2, and the limit on the threaded cover plate 62 is released, and the threaded cover plate 62 is rotated. The threaded cover plate 62 rotates and moves longitudinally at the same time, thereby driving the elastic member 633 to move, and the deformation of the elastic member 633 is adjusted, thereby adjusting the extrusion force of the elastic member 633, thereby adjusting the friction between the abutting ring 632 and the measuring scale plate 2 4, thereby achieving the purpose of adjusting the rotation tightness between the measuring scale plate 1 and the measuring scale plate 2 4; During measurement, the extended ruler 9 first moves horizontally and then moves vertically, so that the extended ruler 9 abuts against the end of the measuring ruler 1 and the measuring ruler 2 4 away from the fixed tube 2, and the magnetic block 3 861 and the magnetic block 4 862 are magnetically attracted together to fix the extended ruler 9. The longer measuring device is convenient for the user to hold for measurement, and the measuring ruler 2 4 is rotated so that the measuring ruler 1 and the measuring ruler 2 4 abut against the two sides of the object to be measured respectively, and the measured angle is displayed on the display screen 5; during storage, the extended ruler 9 first moves vertically so that the sliding block 83 abuts against the limit block 84, and then the extended ruler 9 moves horizontally so that the extended ruler 9 abuts against the side of the measuring ruler 1 and the measuring ruler 2 4 away from each other, and the magnetic block 1 851 and the magnetic block 2 852 are magnetically attracted together to fix the sliding sleeve block 82, thereby fixing the extended ruler 9, reducing the overall length of the measuring device, and facilitating storage; Lubricating oil is poured into the connecting tube 71 from the oil inlet pipe 72. When lubrication is needed, the pressing slide rod 73 is pressed. The pressing slide rod 73 drives the piston block 74 to move. The piston block 74 squeezes the lubricating oil and presses the lubricating oil into the connecting cavity 75. Then, the lubricating oil flows into the cavity and the rotating groove to lubricate the limit ring sleeve 3 and the measuring scale plate 4. The rolling ball 10 can also be lubricated to ensure smooth rotation.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable angle measuring device, comprising a measuring scale plate 1 and a measuring scale plate 2, wherein the measuring scale plate 1 is connected to a fixing cylinder, the fixing cylinder is connected to a limiting ring sleeve, a rotating groove is provided on the measuring scale plate 2, a cavity is provided on the measuring scale plate 2, the limiting ring sleeve is rotatably engaged with the rotating groove on the measuring scale plate 2, and a display screen is provided on the measuring scale plate 2, characterized in that: Also includes: A tension adjustment mechanism, one end of which is connected to the measuring scale plate 1 and the other end of which is in contact with the measuring scale plate 2, and is used to adjust the rotational tension between the measuring scale plate 1 and the measuring scale plate 2. The tension adjustment mechanism includes: a threaded rod connected to the measuring scale plate 1, and the threaded rod is arranged inside the fixing tube; A threaded cover plate, wherein a threaded barrel is provided at the center of the bottom of the threaded cover plate, the threaded barrel is threadedly connected to the threaded rod, and a slide groove 1 is provided on the threaded cover plate; an extrusion component, wherein the top end is connected to the threaded cover plate, and the bottom end is abutted against the measuring scale plate 2; a positioning component, wherein one end is connected to the threaded cover plate, and the other end is abutted against the inner wall of the fixed barrel; A lubricating mechanism, connected to the second measuring scale plate, for adding lubricating oil between the fixed cylinder and the limiting ring sleeve; The retracting mechanism is provided with two groups, one end of the retracting mechanism of one group is connected to the measuring scale plate 1, and the other end of the retracting mechanism of the other group is connected to the measuring scale plate 2; The extension ruler plate is provided with two groups and is respectively connected to the other end of the two groups of the extension and retraction mechanisms.

2. A portable angle measuring device according to claim 1, characterized in that: The extrusion assembly comprises: A telescopic straight rod, the top end of which is connected to a threaded cover plate; An abutment ring connected to the bottom end of the telescopic straight rod and abutting against the second measuring ruler plate; The elastic member 1 is sleeved on the telescopic straight rod, and one end of the elastic member is connected to the threaded cover plate, and the other end of the elastic member is connected to the abutting ring.

3. A portable angle measuring device according to claim 1, characterized in that: The positioning component comprises: A sliding folding plate is slidably connected with a sliding groove on the threaded cover plate; A limiting arc plate is connected to the bottom end of the sliding folding plate, and the limiting arc plate is located inside the fixed cylinder and abuts against the inner wall of the fixed cylinder; Press the round block to connect with the top of the sliding flap; The second elastic member has one end connected to the sliding folding plate and the other end connected to the threaded cylinder on the threaded cover plate.

4. The portable angle measuring device according to claim 1, characterized in that: The lubrication mechanism comprises: A connecting tube connected to the second measuring ruler plate; An oil inlet pipe is connected to the connecting tube and communicated with the interior thereof, wherein a one-way valve 1 is provided in the oil inlet pipe; Press the slide bar to penetrate one end of the oil inlet pipe and slide it to connect with it; A piston block is disposed inside the connecting tube and is slidably connected to the inner wall thereof, and the piston block is connected to the pressing slide rod; The connecting cavity is arranged inside the second measuring scale plate and is communicated with the inside of the connecting cylinder. The connecting cavity is communicated with the rotating groove and the inside of the cavity.

5. The portable angle measuring device according to claim 1, characterized in that: The extension and contraction mechanism comprises: Sliding grooves, wherein the sliding grooves are provided in two groups, one group of the sliding grooves is opened on the measuring ruler plate 1, and the other group of the sliding grooves is opened on the measuring ruler plate 2; A sliding sleeve block is slidably connected with the sliding groove; A sliding block is slidably engaged with the sliding sleeve block, and a second sliding groove is provided on the sliding block; A limit block connected to the sliding sleeve block and slidably abutting against the second sliding groove; A fixed component 1, one end of which is connected to the sliding sleeve block, and the other end of which is connected to the sliding groove; The fixing component 2 has one end connected to the measuring scale plate 1 and the measuring scale plate 2, and the other end connected to the extension scale plate.

6. A portable angle measuring device according to claim 5, characterized in that: The fixing component 1 comprises: Magnetic block 1, connected with the sliding sleeve block; The second magnetic block is connected to the sliding groove and is located at one end close to the fixed cylinder. The magnetic properties of the second magnetic block are opposite to those of the first magnetic block.

7. The portable angle measuring device according to claim 5, characterized in that: The second fixing component comprises: Magnetic block three, the magnetic block three is provided with two groups, one group of magnetic blocks three is connected to the measuring scale plate one, and the other group of magnetic blocks three is connected to the measuring scale plate two, and the magnetic block three is located at one end away from the fixed cylinder; Magnetic block four is connected to the extended ruler plate. The magnetic properties of magnetic block four are opposite to those of magnetic block three. Magnetic block four is located at one end close to the fixed cylinder.

8. The portable angle measuring device according to claim 2, characterized in that: Also includes: The rolling ball is arranged in the second cavity of the measuring scale plate and is rotatably connected to the second measuring scale plate. The rolling ball at the bottom is rotatably engaged with the first measuring scale plate, and the rolling ball at the top is rotatably engaged with the bottom of the abutment ring.

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