Weighing device

Abstract

The utility model relates to the technology of weighing devices, in particular to a mechanical weighing device. By designing a four-connecting-rod structure formed by mutually pivoting the rack, the balance rod, the support frame and the connecting rod, a fixed angle is always kept in the swinging process of the balance rod and the lifting process of the support frame, so that a weighing part connected with the balance rod can be kept stable in the vertical moving process; the left-right gravity state of the balance rod is adjusted through movement of the adjusting nut along the adjusting screw rod, so that the weighing purpose is achieved. The weighing device has the advantages of being simple in structure, easy to operate and capable of being used without being powered on, and is suitable for weighing small-dose materials such as tea feeding amount during tea making.

Description

Technical Field

[0001] The utility model relates to the technology of weighing devices, in particular to a mechanical weighing device. Background Art

[0002] For the weighing requirement of small dosages, such as weighing tea for controlling the tea input amount, in the prior art, an electronic gram scale is usually used for weighing. However, the electronic gram scale needs to be powered by a power supply and cannot be used in scenarios where there is no power supply.

[0003] Therefore, there is an urgent need to develop a small-dose weighing device that is convenient to use and does not require power supply. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to develop a small-dose weighing device that is convenient to use and does not require power supply.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is as follows:

[0006] A weighing device, comprising:

[0007] A frame;

[0008] A balance bar, the middle part of the balance bar is pivotally connected to the frame through a first pivoting part;

[0009] A support frame, the support frame is pivotally connected to the balance bar through a second pivoting part;

[0010] A connecting rod, one end of the connecting rod is pivotally connected to the frame through a third pivoting part, the other end of the connecting rod is pivotally connected to the support frame through a fourth pivoting part, the first pivoting part is located above the third pivoting part, and the second pivoting part is located above the fourth pivoting part;

[0011] A weighing part, the weighing part is connected to the support frame;

[0012] An adjusting screw, the adjusting screw is connected to the balance bar through a connecting piece;

[0013] An adjusting nut, the adjusting nut is in threaded fit connection with the adjusting screw.

[0014] Further, in the above structure of the weighing device, a calibration screw is connected to the end of the balance bar, and a calibration nut is in threaded connection with the calibration screw.

[0015] Further, in the above structure of the weighing device, it further comprises:

[0016] A dust-proof shell, the dust-proof shell is connected to the balance bar through a connecting piece, and the adjusting screw is located inside the dust-proof shell.

[0017] Furthermore, in the above weighing device structure, a balance scale is provided on the upper part of the dust-proof housing, the frame is connected with a balance pendulum needle, and the balance pendulum needle is located above the balance scale.

[0018] Furthermore, in the above weighing device structure, the frame includes an outer housing, a first through hole for avoiding the weighing part is provided on the upper part of the outer housing, and an opening is provided on one side of the outer housing facing the position of the adjusting screw, and a cover body is connected at the opening.

[0019] Furthermore, in the above weighing device structure, a second through hole is provided at the position of the upper part of the housing relative to the balance pendulum needle, and a transparent lens is provided at the second through hole.

[0020] Furthermore, in the above weighing device structure, the transparent lens is a convex lens.

[0021] Furthermore, in the above weighing device structure, the weighing part includes a tray, and the tray is detachably connected to the upper part of the support frame.

[0022] Furthermore, in the above weighing device structure, the first pivoting part includes a first support arm connected to the balance rod, the cross section of the first support arm is in the shape of a water droplet, the frame is provided with a first limiting round hole, and the first support arm is inserted into the first limiting round hole in a transition fit manner.

[0023] Furthermore, in the above weighing device structure, the second pivoting part includes a second support arm connected to the balance rod, the cross section of the second support arm is in the shape of a water droplet, the support frame is provided with a second limiting round hole, and the second support arm is inserted into the second limiting round hole in a transition fit manner.

[0024] The beneficial effects of the present utility model are as follows: By designing a four-bar linkage structure formed by the mutual pivoting of the frame, the balance rod, the support frame and the connecting rod, during the swinging process of the balance rod, the lifting process of the support frame always maintains a fixed angle, so that the weighing part connected thereto can remain stable during the up and down movement. By setting the weight scale on the adjusting screw and adjusting the left and right gravity states of the balance rod by moving the adjusting nut along the adjusting screw, the weighing purpose can be achieved. The weighing device involved in the present utility model has the advantages of simple structure, simple operation and can be used without power supply, and is suitable for weighing small-dose materials such as the amount of tea leaves put into the tea when making tea. Description of the Drawings

[0025] Figure 1 It is a schematic structural view of a weighing device according to a specific embodiment of the present utility model;

[0026] Figure 2 It is a side view of a weighing device according to a specific embodiment of the present utility model;

[0027] Figure 3 is Figure 2 the sectional view taken along the line A-A of

[0028] Figure 4 the top view of a weighing device according to a specific embodiment of the present invention;

[0029] Figure 5 is Figure 4 the sectional view taken along the line B-B of

[0030] Figure 6 is Figure 4 the sectional view taken along the line C-C of

[0031] Figure 7 is Figure 5 the enlarged view of part D of

[0032] Figure 8 is Figure 5 the enlarged view of part E of

[0033] Reference numeral description:

[0034] 1. Frame; 11. Outer housing; 111. Cover; 12. Balance pendulum; 13. First through hole; 14. Second through hole; 15. Transparent lens; 16. First limiting round hole;

[0035] 2. Balance rod; 21. First pivoting part; 211. First support arm; 22. Second pivoting part; 221. Second support arm; 23. Connecting member;

[0036] 3. Support frame; 31. Second limiting round hole;

[0037] 4. Link; 41. Third pivoting part; 42. Fourth pivoting part;

[0038] 5. Weighing part; 51. Tray;

[0039] 61. Adjusting screw; 62. Adjusting nut;

[0040] 71. Calibration screw; 72. Calibration nut;

[0041] 8. Dust-proof housing; 81. Balance scale. Specific embodiments

[0042] To describe in detail the technical content, achieved objectives and effects of the present invention, the following is described in conjunction with the embodiments and with reference to the drawings.

[0043] Please refer to Figures 1 to 8 , a specific embodiment of the present invention relates to a weighing device, comprising:

[0044] Frame 1;

[0045] A balance bar 2, the middle of the balance bar 2 is pivotally connected to the frame 1 through a first pivot portion 21;

[0046] A support frame 3, the support frame 3 is pivotally connected to the balance bar 2 through a second pivot portion 22;

[0047] A connecting rod 4, one end of the connecting rod 4 is pivotally connected to the frame 1 through a third pivot portion 41, the other end of the connecting rod 4 is pivotally connected to the support frame 3 through a fourth pivot portion 42, the first pivot portion 21 is located above the third pivot portion 41, and the second pivot portion 22 is located above the fourth pivot portion 42;

[0048] A weighing portion 5, the weighing portion 5 is connected to the support frame 3;

[0049] An adjusting screw 61, the adjusting screw 61 is connected to the balance bar 2 through a connecting member 23;

[0050] An adjusting nut 62, the adjusting nut 62 is in threaded engagement with the adjusting screw 61.

[0051] In the above embodiments, a cutting plane is provided on one side of the adjusting screw 61, and a scale for marking the gram weight is provided on the cutting plane by laser marking. An anti-slip edge scale is provided on the outer circumference of the adjusting nut 62 to facilitate the user's rotation and adjustment operation.

[0052] In the above embodiments, by designing a four-bar linkage 4 structure formed by pivotally connecting the frame 1, the balance bar 2, the support frame 3 and the connecting rod 4, during the swinging process of the balance bar 2, the lifting process of the support frame 3 always maintains a fixed angle, so that the connected weighing portion 5 can remain stable during the up and down movement. By setting the scale of the gram weight on the adjusting screw 61 and adjusting the left and right gravity states of the balance bar 2 by moving the adjusting nut 62 along the adjusting screw 61, the weighing purpose is achieved. The weighing device involved in the present invention has the advantages of simple structure, simple operation, and can be used without power supply. It is suitable for weighing small-dose materials such as the amount of tea leaves put into the tea when making tea. The weighing result is very accurate, and the error can be controlled within 0.03 g.

[0053] As a preferred embodiment, a calibration screw 71 is connected to the end of the balance bar 2, and a calibration nut 72 is threadedly connected to the calibration screw 71.

[0054] In the above embodiments, by rotating the calibration nut 72 to finely adjust its position threadedly connected to the calibration screw 71, during calibration, a weight or gram weight calibration object of the corresponding gram weight can be placed on the weighing portion 5, the adjusting nut 62 is adjusted to the position of the corresponding scale, and then by rotating the calibration nut 72, the balance bar 2 is brought to a left-right balanced state to ensure the accuracy of the gram weight weighing.

[0055] As a preferred embodiment, it further includes:

[0056] A dust-proof housing 8, the dust-proof housing 8 is connected to the balance rod 2 through a connecting member 23, and the adjusting screw 61 is located inside the dust-proof housing 8.

[0057] In the above embodiments, since the adjusting screw 61 is an important component for calibrating the weight, setting it inside the dust-proof box can avoid interference from external impurities and further improve the accuracy of weight measurement.

[0058] As a preferred embodiment, a balance scale 81 is provided on the upper part of the dust-proof housing 8, the frame 1 is connected with a balance pendulum needle 12, and the balance pendulum needle 12 is located above the balance scale 81.

[0059] In the above embodiments, during the measurement process, the user places the material on the weighing part 5 according to the calibrated weight. For example, in the quantitative weighing of the tea input amount, the tea input amount is adjusted to 5 g by adjusting the nut 62, and the tea is placed on the weighing part 5. At the same time, observe the position of the balance pendulum needle 12 relative to the balance scale 81, and adjust the tea input amount to make the balance pendulum needle 12 located in the middle of the balance scale 81, then the weighing is completed.

[0060] As a preferred embodiment, the frame 1 includes an outer housing 11, a first through hole 13 for avoiding the weighing part 5 is provided on the upper part of the outer housing 11, and an opening is provided on one side of the outer housing 11 facing the position of the adjusting screw 61, and a cover 111 is connected at the opening.

[0061] In the above embodiments, referring to Figure 1 , the outer housing 11 is rectangular in shape, and the cover 111 adopts a combination of pivot connection and snap connection to movably close the opening where the adjusting screw 61 is located. When not in use, the opening is covered to prevent dust. When in use, the cover 111 is opened to facilitate the rotation operation of the adjusting nut 62.

[0062] As a preferred embodiment, a second through hole 14 is provided at the upper part of the housing relative to the position of the balance pendulum needle 12, and a transparent lens 15 is provided at the second through hole 14.

[0063] Preferably, the transparent lens 15 is a convex lens.

[0064] In the above embodiments, the convex lens can play a role in magnifying the balance pendulum needle 12 and the balance scale 81, which is convenient for the user to observe.

[0065] As a preferred embodiment, the weighing part 5 includes a tray 51, and the tray 51 is detachably connected to the upper part of the support frame 3.

[0066] Referring to Figure 1, the tray 51 includes a supporting plane at the bottom and side baffles provided at the edge of the supporting plane. A notch for discharging materials is provided on one side of the tray 51. For example, after the weighing of the tea input amount is completed, the tray 51 can be removed from the support frame 3, and the tea leaves can be poured into the container through the notch for brewing.

[0067] As a preferred embodiment, the first pivoting portion 21 includes a first support arm 211 connected to the balance rod 2. The cross-section of the first support arm 211 is in the shape of a water droplet. The frame 1 is provided with a first limiting round hole 16. The first support arm 211 is transitionally fitted through the first limiting round hole 16. The hole wall of the first limiting through hole and the surface of the first support arm 211 are both smooth surfaces.

[0068] As a preferred embodiment, the second pivoting portion 22 includes a second support arm 221 connected to the balance rod 2. The cross-section of the second support arm 221 is in the shape of a water droplet. The support frame 3 is provided with a second limiting round hole 31. The second support arm 221 is transitionally fitted through the second limiting round hole 31. The hole wall of the second limiting through hole and the surface of the second support arm 221 are both smooth surfaces.

[0069] In the above embodiments, with reference to Figure 7 and Figure 8 , both the first relief portion and the second pivoting portion 22 adopt the connection relationship of the water-droplet-shaped support arms and the corresponding limiting round holes with transitional fit to realize the rotational connection of the pivoting portions. While ensuring the pivoting stability, the friction contact area of the pivoting portions is effectively reduced, the friction resistance of the pivoting portions is reduced, and the weighing accuracy is further improved.

[0070] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A weighing device, characterized in that: include: frame; A balance bar, wherein the middle portion of the balance bar is pivotally connected to the frame via a first pivoting portion; A support frame, the support frame is pivotally connected to the balance pole through a second pivoting portion; A connecting rod, one end of which is pivotally connected to the frame via a third pivoting portion, and the other end of which is pivotally connected to the support frame via a fourth pivoting portion, wherein the first pivoting portion is located above the third pivoting portion, and the second pivoting portion is located above the fourth pivoting portion; A weighing part connected to the supporting frame; An adjusting screw rod, wherein the adjusting screw rod is connected to the balancing rod through a connecting piece; An adjusting nut is threadably connected to the adjusting screw.

2. The weighing device according to claim 1, characterized in that: The end of the balancing rod is connected with a calibration screw, and the calibration screw is threadedly connected with a calibration nut.

3. The weighing device according to claim 1, characterized in that: Also includes: A dustproof shell is connected to the balance rod through a connecting piece, and the adjusting screw is located in the dustproof shell.

4. The weighing device according to claim 3, characterized in that: A balance scale is arranged on the upper part of the dustproof shell, and a balance pendulum needle is connected to the frame, and the balance pendulum needle is located above the balance scale.

5. The weighing device according to claim 4, characterized in that: The frame comprises an outer shell, the upper part of which is provided with a first through hole for avoiding the weighing part, and the outer shell is provided with an opening on one side facing the position of the adjusting screw, and the opening is connected with a cover.

6. The weighing device according to claim 5, characterized in that: A second through hole is provided at the upper portion of the shell relative to the position of the balance pendulum needle, and a transparent lens is provided at the second through hole.

7. The weighing device according to claim 6, characterized in that: The transparent lens is a convex lens.

8. The weighing device according to claim 1, characterized in that: The weighing part comprises a tray, and the tray is detachably connected to the upper part of the supporting frame.

9. The weighing device according to claim 1, characterized in that: The first pivoting portion includes a first support arm connected to the balance pole, the cross section of the first support arm is teardrop-shaped, the frame is provided with a first limiting circular hole, and the first support arm is disposed in a transitionally matched manner through the first limiting circular hole.

10. The weighing device according to claim 1, characterized in that: The second pivoting portion includes a second support arm connected to the balance pole, the cross section of the second support arm is teardrop-shaped, the support frame is provided with a second limiting circular hole, and the second support arm is passed through the second limiting circular hole in a transitionally matched manner.

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