Weighing scale with adjustable supporting arm

Abstract

The invention relates to a scale with an adjustable supporting arm, which comprises an outer cover, a scale main body, a frame main body arranged on the rear side of the scale main body, a positioning frame and a fixing frame which are arranged on the frame main body, a position adjusting wheel arranged on the fixing frame, a supporting arm movably arranged on the positioning frame, a first limiting rod and a second limiting rod, the supporting arm is located at a first position or a second position, the first limiting rod limits the supporting arm at the first position, and the second limiting rod limits the supporting arm at the second position; the supporting arm comprises a cross rod and two longitudinal rods connected to the two ends of the cross rod, and the bottoms of the two longitudinal rods and the two positioning frames are installed in a matched mode respectively. The pound scale body further comprises two supporting blocks, the supporting blocks are installed at the positions, close to the front side, of the outer cover, and when the supporting arms are adjusted to the second positions, the cross rods of the supporting arms abut against the walls of the supporting grooves of the supporting blocks. According to the invention, the occupied space of the scale during transportation or transfer is effectively reduced, and the overall structure is flexible.

Description

Technical Field

[0001] The invention relates to a weighing device, in particular to a weighing scale with an adjustable support arm. Background Art

[0002] A scale is a device used to measure weight, and is commonly used in warehouses, workshops, freight yards, and markets. With the continuous development of technology, there are more and more types of scales on the market. One type of scale is based on the scale body and is also equipped with a vertical pole, on which a dial or other electronic equipment is installed.

[0003] For the above-mentioned scales with a vertical pole, the vertical pole cannot be adjusted in angle, and occupies a large space during transportation, transfer or idleness, causing trouble to users. In order to solve this usage defect and save space, some manufacturers use a detachable structure with screw locking on the vertical pole of the scale, but there is a problem of inconvenient disassembly and assembly. Summary of the invention

[0004] Based on this, it is necessary to provide a support arm adjustable scale to address the deficiencies in the prior art.

[0005] A support arm adjustable scale, comprising an outer cover, a scale body, a frame body installed at the rear side of the scale body, a positioning frame and a fixing frame installed on the frame body, a positioning wheel installed on the fixing frame, a support arm movably installed on the positioning frame, a first limiting rod and a second limiting rod, wherein the outer cover is arranged on the outside of the scale body, the frame body, the positioning frame and the fixing frame, the support arm extends from the outer cover and is installed in cooperation with the positioning frame, and the support arm can be adjusted in angle on the positioning frame to be in a first position in a vertical state or a second position in a horizontal state The first limit rod limits the support arm at the first position, and the second limit rod limits the support arm at the second position; the support arm includes a cross bar and two longitudinal bars connected to the two ends of the cross bar, and the bottoms of the two longitudinal bars are respectively installed in cooperation with two positioning frames; the scale body also includes a support block, which is installed on the front side of the outer cover, and a bracket is provided on the upper end surface of the support block, and the bracket passes through the support block in the horizontal direction, and the bottom of the bracket corresponds to the shape of the cross bar; when the support arm is adjusted to the second position, the cross bar of the support arm rests on the bracket wall of the support block.

[0006] In one of the embodiments, the positioning frame includes two positioning plates arranged opposite to each other, a connecting plate connecting the two positioning plates at the rear side, and a rotating pin installed horizontally on the two positioning plates, and the positioning frame is provided with an avoidance opening under the connecting plate; a matching hole is provided on the longitudinal rod of the support arm, and the matching hole is arranged at the rear end of the longitudinal rod, and an installation space is formed between the two positioning plates, and the end of the longitudinal rod of the support arm is arranged in the installation space of the positioning frame, and the rotating pin of the positioning frame passes through the matching hole of the support arm, and the support arm can rotate around the rotating pin.

[0007] In one embodiment, a fixing hole is further provided on the longitudinal rod of the support arm, and the positioning frame further includes a first positioning block and a second positioning block. The first positioning block and the second positioning block are installed on the outer side of the same positioning plate facing away from the other positioning plate. The positioning frame is also provided with a first positioning hole and a second positioning hole. The first positioning hole penetrates the first positioning block and the two positioning plates in a horizontal direction, and the second positioning hole penetrates the second positioning block and the two positioning plates in a horizontal direction. When the support arm is adjusted to a first position in a vertical state, the fixing hole on the longitudinal rod is aligned with the first positioning hole on the positioning frame; when the support arm is adjusted to a second position in a vertical state, the fixing hole on the longitudinal rod is aligned with the second positioning hole on the positioning frame.

[0008] In one embodiment, the first positioning hole is provided with internal threads on the hole wall of the first positioning block and the positioning block position connected to the first positioning block, the first limiting rod comprises a rod body, a positioning head connected to one end of the rod body, and a limiting block mounted on the positioning head, the rod body comprises a first fixing section and a second fixing section, the first fixing section is arranged at a position close to the limiting block, and the first fixing section is provided with external threads;

[0009] When the support arm is adjusted to the first position of the vertical state and is fixed, the longitudinal rod of the support arm rests on the connecting plate, the fixing hole on the longitudinal rod is aligned with the first positioning hole on the positioning frame, and the first limiting rod is installed on the positioning frame. During installation, the second fixing section of the rod body passes through the first positioning hole of the positioning plate and the fixing hole of the support arm, the external thread on the first fixing section of the first limiting rod is matched with the internal thread of the first positioning hole on the positioning frame for installation, and the limiting block on the first limiting rod rests on the outer cover.

[0010] In one embodiment, the second positioning hole is provided with internal threads on the hole wall of the second positioning block and the positioning block connected to the second positioning block. The second limiting rod includes a rod body, a positioning head connected to one end of the rod body, and a limiting block installed on the positioning head. The rod body includes a first fixing section and a second fixing section. The first fixing section is arranged at a position close to the limiting block, and the first fixing section is provided with external threads.

[0011] When the support arm is adjusted to the second position of the vertical state and fixed, the fixing hole on the longitudinal rod is aligned with the second positioning hole on the positioning frame, and the second limiting rod is installed on the positioning frame. During installation, the second fixing section of the second limiting rod passes through the second positioning hole of the positioning plate and the fixing hole of the support arm, and the external thread on the second fixing section of the second limiting rod is installed in cooperation with the internal thread of the second positioning hole on the positioning frame. The limiting block on the second limiting rod rests on the outer cover, and the support block provides auxiliary support to the support arm.

[0012] In one embodiment, a first clamping hole is provided on the cross bar of the support arm, a second clamping hole is further provided on the bottom of the bracket groove wall of the bracket block, an internal thread is provided on the hole wall of the clamping hole, the second limiting rod comprises a rod body, a positioning head connected to one end of the rod body, and a limiting block installed on the positioning head, and the rod body comprises a first fixed section;

[0013] When the support arm is adjusted to the second position of the horizontal state and fixed, the first clamping hole on the cross bar is vertically aligned with the second clamping hole on the plug block, the first fixing section of the second limiting rod passes through the first clamping hole and extends into the second clamping hole of the support block, and the external thread of the first fixing section is matched with the internal thread of the hole wall of the second clamping hole for installation.

[0014] In one embodiment, the first positioning block is installed at the rear side of the positioning plate, and the second positioning block is installed at the front side of the positioning plate; the positioning pin is arranged between the second positioning hole and the first positioning hole at the front and rear positions, and the positioning pin is arranged between the first positioning hole and the second positioning hole at the upper and lower positions.

[0015] In one of the embodiments, the middle portion of the outer cover is concave to form a receiving groove, and a front convex shell and a rear convex shell are formed at the front and rear positions of the outer cover respectively. An inclined guide surface is provided at the middle position of the front side of the rear convex shell, and an avoidance groove is also provided at the front side of the rear convex shell. The avoidance groove avoids the support rod during the adjustment process, and an avoidance hole is provided on the rear side surface of the rear convex shell, and the adjustment wheel extends from the avoidance hole.

[0016] In one of the embodiments, two through holes are respectively provided on the left and right sides of the rear convex shell of the outer cover, and the two through holes on the same side are respectively aligned with the first positioning hole and the second positioning hole.

[0017] In one of the embodiments, it also includes an inclined guide plate and a side baffle plate. The scale body is provided with a weighing plate, and the weighing plate is arranged in a receiving groove. The inclined guide plate and the side baffle plate are both installed on the outer cover. The inclined guide plate and the side baffle plate are arranged on the left and right sides of the weighing plate, and the inclined guide plate can be freely disassembled and assembled on the outer shell; the positioning wheel faces the rear of the scale body. When the scale needs to be moved, the scale is turned over so that the positioning wheel faces downward and rolls in contact with the ground.

[0018] The beneficial effect of the adjustable support arm type scale of the present invention is that by setting a positioning frame, a support arm movably installed on the positioning frame, a first limit rod and a second limit rod, the support arm can be adjusted in angle on the positioning frame to be in a first position in a vertical state or a second position in a horizontal state. The first limit rod and the second limit rod can limit the support arm in the first position and the second position respectively, thereby achieving adjustable and fixed position of the support arm, effectively reducing the space occupied by the scale during transportation or transfer. The overall structure is flexible, highly practical, and has great promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a scale with adjustable support arm according to a first embodiment of the present invention, wherein the support arm is in a first position;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the adjustable support arm scale at another angle;

[0021] Figure 3 for Figure 1 An exploded view of a scale with adjustable support arm is shown;

[0022] Figure 4 for Figure 1 The structural diagram of the positioning frame, the supporting arm, the first limiting rod and the second limiting rod of the supporting arm adjustable scale shown in FIG.

[0023] Figure 5 for Figure 4 Enlarged view of the middle circled portion A;

[0024] Figure 6 for Figure 4 The structural schematic diagram of the positioning frame shown;

[0025] Figure 7 It is a structural schematic diagram of a weighing scale with an adjustable support arm according to the first embodiment of the present invention, wherein the support arm is in the second position, and the fixed head and the control panel are not shown;

[0026] Figure 8 It is a structural schematic diagram of a scale with an adjustable support arm according to a second embodiment of the present invention, wherein the support arm is in a second position, and the fixed head and the control panel are not shown;

[0027] Fig. 9 for Figure 8 Schematic diagram of the structure when the support arm and the support block are installed in coordination. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] See also Figures 1 to 5 , which is the first embodiment of the present invention, and this embodiment provides a support arm adjustable scale, comprising an outer cover 20, a scale body 10, a frame body 30 installed on the rear side of the scale body 10, a positioning frame 40 and a fixing frame 50 installed on the frame body 30, a positioning wheel 60 installed on the fixing frame 50, a support arm 70 movably installed on the positioning frame 40, a fixing head 100 installed on the support arm 70, a control panel 110 installed on the fixing head 100, a first limiting rod 80 and a second limiting rod 90, wherein the outer cover 20 is arranged on the scale On the outside of the main body 10, the frame body 30, the positioning frame 40 and the fixing frame 50, the support arm 70 extends from the outer cover 20 and is installed in cooperation with the positioning frame 40. The angle of the support arm 70 can be adjusted on the positioning frame 40 so that it is in a first position in a vertical state or a second position in a horizontal state. The first limiting rod 80 and the second limiting rod 90 can pass through the outer cover 20 and can be freely disassembled and assembled with the positioning frame 40. The first limiting rod 80 limits the support arm 70 in the first position, and the second limiting rod 90 limits the support arm 70 in the second position.

[0035] In this embodiment, there are two positioning frames 40 and two fixing frames 50, and the two positioning frames 40 are respectively installed on both sides of the frame body 30, and the two fixing frames 50 are arranged between the two positioning frames 40. The support arm 70 is arranged in an inverted U shape as a whole. The support arm 70 includes a cross bar 71 and two longitudinal bars 72 connected to the two ends of the cross bar 71. The bottoms of the two longitudinal bars 72 are respectively installed with the two positioning frames 40. There are two groups of positioning wheels 60, and the two groups of positioning wheels 60 are respectively installed on the two fixing frames 50. During the weighing process, the positioning wheels 60 face the rear of the scale body 10. When it is necessary to move the scale, the scale can be turned over so that the positioning wheels 60 face downward and roll in contact with the ground.

[0036] The middle part of the outer cover 20 is concave to form a receiving groove 23. The front and rear positions of the outer cover 20 respectively form a front convex shell 22 and a rear convex shell 21. The front side of the rear convex shell 21 is provided with an inclined guide surface 211 near the middle position, and the rear convex shell 21 is also provided with an avoidance groove 212 near the front side. The avoidance groove 212 avoids the support rod during the adjustment process. The rear side surface of the rear convex shell 21 is provided with an avoidance hole 213, and the adjustment wheel 60 extends from the avoidance hole 213. The present invention also includes an inclined guide plate and a side baffle.

[0037] The scale body 10 is provided with a weighing plate 11 and a weighing assembly 12. The weighing plate 11 is arranged in a receiving groove 23. The weighing assembly 12 extends from the middle of the outer cover 20 and abuts against the bottom of the weighing plate 11. The inclined guide plate 130 and the side baffle 140 are both installed on the outer cover 20. The inclined guide plate 130 and the side baffle 140 are arranged on the left and right sides of the weighing plate 11. The inclined guide plate 130 can be freely disassembled and assembled on the outer shell. In addition, the scale body 10 also includes two brackets 120. The brackets 120 are installed on the front convex shell 22 at the front side. The upper end surface of the bracket 120 is provided with a bracket 121. The bracket 121 passes through the bracket 120 in the horizontal direction. The bottom of the bracket 121 is arranged in an arc shape, corresponding to the shape of the cross bar 71.

[0038] The positioning frame 40 includes two positioning plates 41 arranged opposite to each other, a connecting plate 42 connecting the two positioning plates 41 at the rear side, a rotating pin 43 installed transversely on the two positioning plates 41, a first positioning block 44, and a second positioning block 45. The positioning frame 40 is provided with an escape opening 48 below the connecting plate 42. The first positioning block 44 and the second positioning block 45 are installed at the outer side of the same positioning plate 41 facing away from the other positioning plate 41. The first positioning block 44 is installed at the rear side of the positioning plate 41, and the second positioning block 45 is installed at the outer side of the positioning plate 41. The positioning plate 41 is located at the front side, and the front sides of the two positioning plates 41 are installed at the bevel cut 410. The positioning frame 40 is also provided with a first positioning hole 46 and a second positioning hole 47. The first positioning hole 46 penetrates the first positioning block 44 and the two positioning plates 41 in the horizontal direction, and the second positioning hole 47 penetrates the second positioning block 45 and the two positioning plates 41 in the horizontal direction. The positioning pin is provided between the second positioning hole 47 and the first positioning hole 46 at the front and rear positions, and the positioning pin is provided between the first positioning hole 46 and the second positioning hole 47 at the upper and lower positions. The first positioning hole 46 is provided with an internal thread on the hole wall of the first positioning block 44 and the positioning block position connected to the first positioning block 44, and the second positioning hole 47 is provided with an internal thread on the hole wall of the second positioning block 45 and the positioning block position connected to the second positioning block 45.

[0039] The first limiting rod 80 and the second limiting rod 90 both comprise a rod body (82, 92), a positioning head (81, 91) connected to one end of the rod body (82, 92), and a limiting block (83, 93) mounted on the positioning head (81, 91); the rod body (82, 92) comprises a first fixing section (821, 921) and a second fixing section (822, 922); the first fixing section (821, 921) is arranged at a position close to the limiting block (83, 93); the outer diameter of the first fixing section (821, 921) is slightly larger than the outer diameter of the second fixing section (822, 922); and the first fixing section (821, 921) is provided with an external thread.

[0040] The longitudinal rod 72 of the support arm 70 is provided with a matching hole 721 and a fixing hole 722 , and the matching hole 721 is arranged at the rear end of the longitudinal rod 72 .

[0041] During assembly, the oblique cutout 410 fits with the inner side of the oblique guide surface 211 of the outer cover 20, and an installation space 49 is formed between the two positioning plates 41. The installation space 49 is aligned with the avoidance groove 212 of the rear convex shell 21. In addition, two through holes are respectively provided on the left and right sides of the rear convex shell 21 of the outer cover 20, and the two through holes at the same side are respectively aligned with the first positioning hole 46 and the second positioning hole 47. The end of the longitudinal rod 72 of the support arm 70 is arranged in the installation space 49 of the positioning frame 40, and the rotation pin 43 of the positioning frame 40 passes through the matching hole 721 of the support arm 70, and the support arm 70 can rotate around the rotation pin 43.

[0042] Please read further Figure 6 During use, when the support arm 70 needs to be adjusted to the first position of the vertical state, the support arm 70 is flipped upward, and the avoidance opening 48 of the positioning frame 40 avoids the bottom of the longitudinal rod 72 until the longitudinal rod 72 of the support arm 70 is against the connecting plate 42. At this time, the fixing hole 722 on the longitudinal rod 72 is aligned with the first positioning hole 46 on the positioning frame 40, and then the first limiting rod 80 is installed on the positioning frame 40. During installation, the second fixing section 822 of the first limiting rod 80 passes through the through hole of the outer cover 20 and the first fixing hole 46 of the positioning plate 41. The first limiting rod 80 is rotated so that the external thread on the first fixing section 821 of the first limiting rod 80 cooperates with the internal thread of the first positioning hole 46 on the positioning frame 40 for installation until the limiting block 83 on the first limiting rod 80 abuts against the outer cover 20. At the same time, the rotating pin 43 passing through the longitudinal rod 72 and the first fixing section 821 of the first limiting rod 80 cooperate to limit the support arm 70. After the support arm 70 is installed, the second limiting rod 90 is installed on the positioning frame 40 for next use.

[0043] Please read further Figure 7When the support arm 70 needs to be adjusted to the second position of the horizontal state, the first limiting rod 80 and the second limiting rod 90 are first released from the positioning frame 40, and the support arm 70 is flipped downward, and the avoidance opening 48 of the positioning frame 40 avoids the bottom of the longitudinal rod 72 until the cross bar 71 of the support arm 70 is against the wall of the bracket 121 of the bracket block 120. At this time, the fixing hole 722 on the longitudinal rod 72 is aligned with the second positioning hole 47 on the positioning frame 40, and then the second limiting rod 90 is installed on the positioning frame 40. During installation, the second fixing section 922 of the second limiting rod 90 passes through the outer cover 2 0, the second positioning hole 47 of the positioning plate 41 and the fixing hole 722 of the support arm 70, rotate the second limiting rod 90, and the external thread on the second fixing section 922 of the second limiting rod 90 cooperates with the internal thread of the second positioning hole 47 on the positioning frame 40 until the limiting block 93 on the second limiting rod 90 abuts against the outer cover 20, and at the same time, the rotating pin 43 passing through the longitudinal rod 72 and the second fixing section 922 of the second limiting rod 90 cooperate to limit the support arm 70. After the support arm 70 is installed, the first limiting rod 80 is installed on the positioning frame 40 for next use. The support block 120 provides auxiliary support for the support arm 70, increases the bearing capacity of the support arm 70, and effectively prevents the support arm 70 from being deformed when it is hit.

[0044] See also Figure 8 , Fig. 9 , which is the second embodiment of the present invention. The scale structure in this embodiment is basically similar to that in the first embodiment, except that the cross bar 71 of the support arm 70 is provided with a first clamping hole 73, the second limiting rod 90 is not provided with a second fixing section (922), and the bracket block 120 is further provided with a second clamping hole 122 at the bottom of the bracket groove 121, and the hole wall of the clamping hole is provided with an internal thread.

[0045] When the support arm 70 needs to be adjusted to the second position of the horizontal state, the first limiting rod 80 and the second limiting rod 90 are first released from the positioning frame 40, and the support arm 70 is flipped downward until the cross bar 71 of the support arm 70 is against the wall of the bracket 121 of the support block 120, the first clamping hole 73 on the cross bar 71 is vertically aligned with the second clamping hole 122 on the plug block, the first fixing section 821 of the second limiting rod 90 passes through the first clamping hole 73 and extends into the second clamping hole 122 of the support block 120, and the external thread of the first fixing section 821 is installed in cooperation with the internal thread of the hole wall of the second clamping hole 122. When the support arm 70 needs to be adjusted to the first position of the horizontal state, the second limiting rod 90 is first released, and then the support arm 70 is adjusted to the first position of the horizontal state. At this time, the second limiting rod 90 can be selected to be installed again on the support block 120 or the second positioning block 45 on the positioning frame 40.

[0046] The beneficial effect of the support arm adjustable scale of the present invention is that: by setting a positioning frame 40, a support arm 70 movably installed on the positioning frame 40, a first limit rod 80 and a second limit rod 90, the support arm 70 can be adjusted in angle on the positioning frame 40 so that it is in a first position in a vertical state or a second position in a horizontal state. The first limit rod 80 and the second limit rod 90 can limit the support arm 70 in the first position and the second position respectively, so that the position of the support arm 70 can be adjusted and fixed, effectively reducing the space occupied by the scale during transportation or transfer. The overall structure is flexible, highly practical, and has a strong promotion significance.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A scale with adjustable support arm, characterized in that: The invention comprises an outer cover, a scale body, a frame body installed at the rear side of the scale body, a positioning frame and a fixing frame installed on the frame body, a positioning wheel installed on the fixing frame, a support arm movably installed on the positioning frame, a first limiting rod and a second limiting rod, wherein the outer cover is arranged on the outside of the scale body, the frame body, the positioning frame and the fixing frame, the support arm extends from the outer cover and is installed in cooperation with the positioning frame, the support arm can be adjusted in angle on the positioning frame to be in a first position in a vertical state or a second position in a horizontal state, and the first limiting rod The positioning rod limits the support arm at the first position, and the second limiting rod limits the support arm at the second position; the support arm includes a cross bar and two longitudinal bars connected to the two ends of the cross bar, and the bottoms of the two longitudinal bars are respectively installed in cooperation with two positioning frames; the scale body also includes a support block, which is installed on the front side of the outer cover, and a bracket is provided on the upper end surface of the support block, and the bracket passes through the support block in the horizontal direction, and the bottom of the bracket corresponds to the shape of the cross bar; when the support arm is adjusted to the second position, the cross bar of the support arm rests on the bracket wall of the support block.

2. The support arm adjustable scale according to claim 1, characterized in that: The positioning frame includes two positioning plates arranged opposite to each other, a connecting plate connecting the two positioning plates at the rear side, and a rotating pin installed horizontally on the two positioning plates. The positioning frame is provided with an avoidance opening below the connecting plate; a matching hole is provided on the longitudinal rod of the support arm, and the matching hole is arranged at the rear end of the longitudinal rod. An installation space is formed between the two positioning plates, and the end of the longitudinal rod of the support arm is arranged in the installation space of the positioning frame. The rotating pin of the positioning frame passes through the matching hole of the support arm, and the support arm can rotate around the rotating pin.

3. The support arm adjustable scale according to claim 2, characterized in that: The longitudinal rod of the support arm is also provided with a fixing hole, and the positioning frame also includes a first positioning block and a second positioning block. The first positioning block and the second positioning block are installed on the outer side of the same positioning plate facing away from the other positioning plate. The positioning frame is also provided with a first positioning hole and a second positioning hole. The first positioning hole penetrates the first positioning block and the two positioning plates in a horizontal direction, and the second positioning hole penetrates the second positioning block and the two positioning plates in a horizontal direction. When the support arm is adjusted to a first position in a vertical state, the fixing hole on the longitudinal rod is aligned with the first positioning hole on the positioning frame; when the support arm is adjusted to a second position in a vertical state, the fixing hole on the longitudinal rod is aligned with the second positioning hole on the positioning frame.

4. The support arm adjustable scale according to claim 3, characterized in that: The first positioning hole is provided with internal threads on the hole wall of the first positioning block and the positioning block position connected to the first positioning block, the first limiting rod includes a rod body, a positioning head connected to one end of the rod body, and a limiting block installed on the positioning head, the rod body includes a first fixing section and a second fixing section, the first fixing section is arranged at a position close to the limiting block, and the first fixing section is provided with external threads; When the support arm is adjusted to the first position of the vertical state and is fixed, the longitudinal rod of the support arm rests on the connecting plate, the fixing hole on the longitudinal rod is aligned with the first positioning hole on the positioning frame, and the first limiting rod is installed on the positioning frame. During installation, the second fixing section of the rod body passes through the first positioning hole of the positioning plate and the fixing hole of the support arm, the external thread on the first fixing section of the first limiting rod is matched with the internal thread of the first positioning hole on the positioning frame for installation, and the limiting block on the first limiting rod rests on the outer cover.

5. The support arm adjustable scale according to claim 3, characterized in that: The second positioning hole is provided with internal threads on the hole wall of the second positioning block and the positioning block position connected to the second positioning block; the second limiting rod includes a rod body, a positioning head connected to one end of the rod body, and a limiting block installed on the positioning head, the rod body includes a first fixing section and a second fixing section, the first fixing section is arranged at a position close to the limiting block, and the first fixing section is provided with external threads; When the support arm is adjusted to the second position of the vertical state and fixed, the fixing hole on the longitudinal rod is aligned with the second positioning hole on the positioning frame, and the second limiting rod is installed on the positioning frame. During installation, the second fixing section of the second limiting rod passes through the second positioning hole of the positioning plate and the fixing hole of the support arm, and the external thread on the second fixing section of the second limiting rod is installed in cooperation with the internal thread of the second positioning hole on the positioning frame. The limiting block on the second limiting rod rests on the outer cover, and the support block provides auxiliary support to the support arm.

6. The support arm adjustable scale according to claim 3, characterized in that: The cross bar of the support arm is provided with a first clamping hole, the bracket block is further provided with a second clamping hole at the bottom of the bracket groove wall, the hole wall of the clamping hole is provided with an internal thread, the second limiting rod comprises a rod body, a positioning head connected to one end of the rod body, and a limiting block installed on the positioning head, and the rod body comprises a first fixed section; When the support arm is adjusted to the second position of the horizontal state and fixed, the first clamping hole on the cross bar is vertically aligned with the second clamping hole on the plug block, the first fixing section of the second limiting rod passes through the first clamping hole and extends into the second clamping hole of the support block, and the external thread of the first fixing section is matched with the internal thread of the hole wall of the second clamping hole for installation.

7. The support arm adjustable scale according to claim 3, characterized in that: The first positioning block is installed at the rear side of the positioning plate, and the second positioning block is installed at the front side of the positioning plate; the positioning pin is arranged between the second positioning hole and the first positioning hole at the front and rear positions, and the positioning pin is arranged between the first positioning hole and the second positioning hole at the upper and lower positions.

8. The support arm adjustable scale according to claim 3, characterized in that: The middle part of the outer cover is concave to form a receiving groove, and a front convex shell and a rear convex shell are formed at the front and rear positions of the outer cover respectively. An inclined guide surface is provided at the middle position of the front side of the rear convex shell, and an avoidance groove is also provided at the front side of the rear convex shell. The avoidance groove avoids the support rod during the adjustment process, and an avoidance hole is provided on the rear side surface of the rear convex shell, and the adjustment wheel extends from the avoidance hole.

9. The support arm adjustable scale according to claim 8, characterized in that: Two through holes are respectively arranged on the left and right sides of the rear convex shell of the outer cover, and the two through holes at the same side are respectively aligned with the first positioning hole and the second positioning hole.

10. The support arm adjustable scale according to claim 8, characterized in that: It also includes an inclined guide plate and a side baffle plate. The scale body is provided with a weighing plate, and the weighing plate is arranged in a receiving groove. The inclined guide plate and the side baffle plate are both installed on the outer cover. The inclined guide plate and the side baffle plate are arranged on the left and right sides of the weighing plate, and the inclined guide plate can be freely disassembled and assembled on the outer shell; the positioning wheel faces the rear of the scale body. When the scale needs to be moved, the scale is turned over so that the positioning wheel faces downward and rolls in contact with the ground.

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