Weighing scale assembly and electronic balance

Abstract

Provided is a scale pan assembly, comprising a scale pan and a scale pan support which are stacked, and also comprising a counterweight block which is replaceably arranged between the scale pan and the scale pan support, and the counterweight block comprises a notch part and a non-notch part which are located on the counterweight block; the scale support comprises an elastic limiting structure. Wherein the notch part is used for containing the elastic limiting structure so as to limit the balancing weight, and the non-notch part is used for extruding the elastic limiting structure so as to allow the balancing weight to move. According to the scale pan assembly, the balancing weight can be stably installed, and the balancing weight can be replaceable. The invention also provides an electronic balance comprising the scale assembly.

Description

Technical Field

[0001] The invention relates to the field of weighing, and in particular to the field of electronic balances. Background Art

[0002] The electronic balance includes a wind shield system, a balance housing and a weighing pan system. Different balance sensors require different weights of weighing pans and weighing pan brackets. Usually, each balance sensor requires a separate weighing pan and weighing pan bracket structure. Some balance weighing pan brackets and weighing pans are fixed by gluing, and some also use counterweights to meet the weighing requirements of the balance sensor.

[0003] The above method has many shortcomings. For example, the process of connecting by gluing is easy to fall off under chemical corrosion conditions, and the reliability is insufficient. Furthermore, the gluing process also requires special tooling, resulting in low production efficiency and increased labor costs. The previous scale pan and scale pan bracket can only be adapted to one type of balance sensor, which is not universal, inconvenient to use, and causes waste. Summary of the invention

[0004] An object of the present invention is to provide a scale pan assembly that can achieve stable installation of a counterweight block and make the counterweight block replaceable.

[0005] To achieve the above-mentioned purpose, the weighing pan assembly includes a stacked weighing pan and a weighing pan bracket, and also includes a counterweight block replaceably arranged between the weighing pan and the weighing pan bracket, the counterweight block includes a notch portion and a non-notch portion located on the counterweight block; the weighing pan bracket includes an elastic limiting structure; wherein the notch portion is used to clamp the elastic limiting structure to limit the counterweight block, and the non-notch portion is used to squeeze the elastic limiting structure to allow the counterweight block to move.

[0006] In one or more embodiments, the elastic limiting structure includes an elastic member and a limiting member connected to the elastic member.

[0007] In one or more embodiments, the bottom surface of the non-notch portion is configured to be able to squeeze the limiting member to apply pressure to the elastic member along the axial direction of the counterweight block.

[0008] In one or more embodiments, the outer side surface of the non-notch portion is configured to be able to squeeze the limiting member to apply pressure to the elastic member along the radial direction of the counterweight block.

[0009] In one or more embodiments, the elastic member is an elastic cantilever beam.

[0010] In one or more embodiments, the notch portion includes an inlet channel and an internal chamber, and the maximum cross-sectional width of the inlet channel is slightly smaller than the minimum width of the limiting member, so that the limiting member can be inserted into the internal chamber through the inlet channel.

[0011] In one or more embodiments, the notch portion includes an arc-shaped surface in contact with the limiting member.

[0012] In one or more embodiments, the scale pan support further includes a positioning structure, which is located above the counterweight block supported by the scale pan support and is used to fix the counterweight block together with the bottom surface of the scale pan support.

[0013] In one or more embodiments, the outer shape of the positioning structure is complementary to the outer shape of the notch portion, or the cross-sectional area of ​​the positioning structure is smaller than the cross-sectional area of ​​the notch portion.

[0014] In one or more embodiments, the positioning structure is disposed on an installation path of the counterweight block to the scale pan bracket, and is configured to guide the installation of the counterweight block by means of cooperation between the positioning structure and the notch portion during installation.

[0015] In one or more embodiments, the scale pan support further includes a fixing structure, and the fixing structure is used to apply a pre-tightening force to the scale pan so as to keep the scale pan and the scale pan support in a relatively stable state.

[0016] In one or more embodiments, the fixing structure applies a radial preload to the circumferential side of the weighing pan.

[0017] In one or more embodiments, the weighing pan includes a horizontal disc surface, a circumferential side surface, and an inclined side surface, the circumferential side surface is connected to the horizontal disc surface via the inclined side surface, and the fixing structure applies a preload force to the inclined side surface.

[0018] In one or more embodiments, the fixing structure includes an elastic portion and a limiting portion, and the limiting portion includes a curved surface for cooperating with the surface of the scale pan.

[0019] In one or more embodiments, the elastic portion is a cantilever beam, and the limiting portion is a limiting bead.

[0020] In one or more embodiments, the weighing pan further includes a groove for engaging with the limiting portion to limit the movement of the weighing pan.

[0021] In one or more embodiments, the weighing pan assembly includes a batch of counterweights with different shapes and / or thicknesses and / or materials, and any of the counterweights can be replaceably disposed between the weighing pan and the weighing pan support.

[0022] Another object of the present invention is to provide an electronic balance, comprising a wind shield system, a balance housing, and characterized in that it also comprises the above-mentioned weighing pan assembly.

[0023] The above-mentioned weighing pan assembly is designed through the elastic limiting structure and the notch part and the non-notch part, and cooperates with the movement of the counterweight block in the rotating weighing pan bracket, so that the elastic limiting structure has the effect of fixing and non-fixing the counterweight block when corresponding to the notch part and the non-notch part respectively. When the elastic limiting structure is stuck in the notch part, it can avoid the risk of easy detachment caused by traditional glue, and realize the stable installation of the counterweight block, the weighing pan and the weighing pan bracket. When the elastic limiting structure cooperates with the non-notch part, the counterweight block can also be removed. By replacing the counterweight block, the counterweight performance of the weighing pan assembly can be adjusted, making the weighing pan assembly more versatile and meeting various weighing requirements of the electronic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0025] Figure 1 It is the external schematic diagram of the electronic balance;

[0026] Figure 2 This is a schematic diagram of the partial structural breakdown of an electronic balance;

[0027] Figure 3 It is a schematic diagram of the disassembly of parts of an embodiment of a weighing pan assembly;

[0028] Figure 4 It is a structural schematic diagram in which the counterweight block and the scale pan support are in a relatively fixed state;

[0029] Figure 5 is a side cross-sectional view of one embodiment of a scale pan assembly;

[0030] Figure 6 It's a weighing pan Figure 5 A partial enlarged view of point C in the middle;

[0031] Figure 7 Schematic diagram of an embodiment of a notch inlet channel.

[0032] Symbols and Markings

[0033] 10. Fan hood system

[0034] 20 Balance housing

[0035] 30 Weighing pan assembly

[0036] 301 weighing pan

[0037] 302 Counterweight

[0038] 304 elastic limit structure

[0039] 305 Positioning structure

[0040] 306 scale support

[0041] 307 Fixed structure

[0042] 3011 Groove

[0043] 3012 Horizontal plate

[0044] 3013 Circumferential side

[0045] 3014 Sloped side

[0046] 3021 Notch

[0047] 3022 Non-notched part

[0048] 3028 Internal chamber

[0049] 3029 Entryway

[0050] 3041 Elastic parts

[0051] 3042 Limiting parts

[0052] 3066 Raised platform

[0053] 3067 Recess

[0054] 3068 Bottom

[0055] 3069 Sidewall

[0056] 3071 elastic part 3072 limiting part DETAILED DESCRIPTION

[0057] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0058] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0059] like Figure 1 and Figure 2As shown, the electronic balance includes a wind shield system 10, a balance housing 20 and a weighing pan assembly 30. The conventional weighing pan assembly includes a weighing pan, a weighing pan support and a counterweight fixed by adhesive glue. When using the adhesive process, it is easy to fall off and separate under the condition of chemical corrosion, and the reliability is insufficient. In addition, after the counterweight is pasted, the weighing pan, the weighing pan support and the counterweight are generally not disassembled, so they have unchangeable counterweight parameters and can only be applied to one balance sensor without universality.

[0060] The scale pan assembly disclosed in the present invention is used to solve the above problems. Figures 3 to 5 As shown, the scale pan assembly 30 includes a stacked scale pan 301 and a scale pan support 306, and also includes a counterweight 302 that can be replaced between the scale pan 301 and the scale pan support 306. Figure 3 As shown, the pan support 306 includes a bottom surface 3068 and a side wall 3069, and a recess 3067 surrounded by the bottom surface 3068 and the side wall 3069. The counterweight 302 is disposed in the recess 3067, and the pan 301 is located above the pan support 306 and the counterweight 302. The pan support 306 includes an elastic limiting structure 304.

[0061] The counterweight block 302 includes a notch portion 3021 and a non-notch portion 3022 located on the counterweight block. The notch portion 3021 and the non-notch portion 3022 may be located at the edge of the counterweight block 302. Figure 3 As shown, it can also be located at other positions such as the disk surface of the counterweight 302. The notch portion 3021 is used to clamp the elastic limiting structure 304 to limit the counterweight 302, and the non-notch portion 3022 is used to squeeze the elastic limiting structure 304 to allow the counterweight 302 to move, thereby preventing the elastic limiting structure 304 from limiting the counterweight 302.

[0062] The term "movement" includes but is not limited to "rotation" or "translation" to achieve the change of the position of the counterweight. It can be understood by those skilled in the art that other movement methods that can achieve the change of the original position, such as moving, inserting, extending, and translating, can be applied to the present disclosure. For example, the non-notch portion 3022 squeezes the elastic limiting structure 304 so that the counterweight 302 can "rotate" or "translate" or "move" in the recess 3067.

[0063] Specifically, during the installation of the counterweight 302, the elastic limiting structure 304 contacts the non-notch portion 3022, and the elastic limiting structure 304 is squeezed by the non-notch portion 3022, leaving the position in the natural state to allow the counterweight 302 to move in the recess 3067 on the scale pan bracket 306; when the elastic limiting structure 304 disengages from the non-notch portion 3022 and enters the notch portion 3021, the elastic limiting structure 304 loses the external squeezing force and is reset by elastic force, stuck in the notch portion 3021, to limit the movement of the counterweight 302 and fix the counterweight 302 on the scale pan bracket 306.

[0064] In some embodiments, the elastic limiting structure 304 includes an elastic member 3041 and a limiting member 3042 connected to the elastic member 3041. The elastic member 3041 can be an elastic cantilever beam or a spring, so that the limiting member 3042 can be displaced when the elastic member 3041 is squeezed, and can also be reset when the external force disappears.

[0065] On the basis of the above embodiment, the first force application method is that the non-notch portion 3022 compresses the limiting member 3042 by means of the bottom surface located in the axial direction S thereof, so as to apply pressure to the elastic member 3041 along the axial direction S, and presses the elastic limiting structure 304 down on the bottom of the entire counterweight 302. During the rotation of the counterweight 302, the elastic limiting structure 304 will be out of contact with the non-notch portion 3022 and cooperate with the notch portion 3021, and the limiting member 3042 will be reset under the elastic restoring force of the elastic member 3041 and lifted to the inside of the notch, thereby limiting the counterweight 302.

[0066] On the basis of the above embodiment, the second force application method is that the non-notch portion 3022 compresses the limiting member 3042 along the radial direction of the counterweight 302 by means of its outer side surface, applies radial pressure to the elastic member 3041, and pushes the elastic limiting structure 304 outward to the radial outer side of the counterweight 302. During the rotation of the counterweight 302, when the elastic limiting structure 304 is out of contact with the non-notch portion 3022, that is, when the elastic limiting structure 304 is matched with the notch portion 3021, the limiting member 3042 is reset under the elastic restoring force of the elastic member 3041, and radially returns to the inside of the notch, thereby limiting the counterweight 302.

[0067] The limiting member 3042 can be a plurality of structures for engaging or locking the limiting position, such as a limiting convex column, a limiting boss or a limiting sphere. By using the above elastic limiting structure, the counterweight 302 can be fixed on the scale support 306, and the function of being detachable and replaceable can also be realized to meet the actual use requirements.

[0068] In some embodiments, the notch shape of the notch portion 3021 can be as follows: Figure 3As shown in the semicircle, the radial inner side surface where the notch 3021 contacts the limiting member 3042 is an arc-shaped surface, so that when the notch and the limiting member 3042 contact and move relative to each other, the resistance can be reduced, thereby facilitating the rotational movement.

[0069] In other embodiments, Figure 7 As shown, the notch portion 3021 includes an inlet channel 3029 and an internal chamber 3028, and the maximum cross-sectional width of the inlet channel 3029 is smaller than the minimum width of the stopper 3042 (for example, the diameter of the spherical stopper bead), so that the stopper 3042 can be inserted into the internal chamber 3028 by squeezing the inlet channel 3029, thereby improving the limiting effect of the stopper 3042 on the counterweight 302 when it is engaged in the internal chamber 3028, and preventing the stopper 3042 from accidentally falling off from the notch portion 3021. Thus, through the engagement of the stopper 3042 and the notch portion 3021, a stable connection relationship is provided between the counterweight 302 and the scale pan support 306. It can be understood by those skilled in the art that the shape of the notch portion 3021 includes but is not limited to the above-mentioned embodiments, and other notch shapes that can engage or lock the stopper 3042 can be applied to the present disclosure.

[0070] Back to Figure 3 and Figure 4 The weighing pan support 306 further includes a positioning structure 305, which is located above the counterweight 302 supported on the weighing pan support 306, and together with the bottom surface of the weighing pan support, fixes the counterweight 302 in the up and down directions.

[0071] The positioning structure 305 plays the role of pressing the counterweight 302 from above. Figure 3 As shown, the shape of the positioning structure 305 and the shape of the notch 3021 can complement each other; the cross-sectional area of ​​the positioning structure 305 can also be smaller than the cross-sectional area of ​​the notch 3021, as long as it can achieve the function of limiting and fixing above the counterweight block.

[0072] In one embodiment, the weighing pan 301 and the weighing pan support 306 are in a separable state. When the counterweight block 302 is installed to the weighing pan support 306 from top to bottom, the positioning structure 305 is located on the installation path of the counterweight block 302 to the weighing pan support 306. Figure 3The semicircular positioning bosses are arranged on the side wall 3069 of the pan support 306. At this time, the notches on the counterweight 302 are aligned with the positioning structures 305 on the pan support 306. The positioning structures 305 cooperate with the notches 3021 to guide the installation position of the counterweight 302. The counterweight 302 is moved down to the bottom surface 3068 of the pan support 306. At this time, the counterweight 302 is guided and the bottom of the counterweight 302 is securely placed in the recess 3067. The counterweight block is then rotated, and when the positioning structure 305 is located above the non-notch portion 3022 of the counterweight block 302 supported by the scale pan bracket 306, and at the same time the limiting member 3042 of the elastic limiting structure 304 is inserted into the notch portion 3021 of the counterweight block 302, the bottom surface 3068 of the scale pan bracket 306 and the positioning structure 305 jointly fix the counterweight block 302 in the up and down directions, and the elastic limiting structure 304 fixes the counterweight block 302 in the horizontal direction. Corresponding to the above embodiment, the disassembly process of the weighing pan assembly is: overcome the squeezing force of the fixed structure 307 to separate the weighing pan 301 and the weighing pan bracket 306 from each other; then separate the elastic limiting structure 304 from the notch portion 3021 manually or with other auxiliary tools, continue to rotate the counterweight block 302 to squeeze the elastic limiting structure 304 until the notch portion 3021 is located below the positioning structure 305, and then lift the counterweight block 302 upward to separate the counterweight block 302 from the weighing pan bracket 306.

[0073] In another embodiment, when the weighing pan 301 and the weighing pan support 306 are in an inseparable state, the counterweight 302 is inserted horizontally into the recess 3067 instead of being inserted up and down. For example, the counterweight 302 of a square, round, oval or other shape is horizontally extended under the positioning structure 305, and the positioning structure 305 and the bottom surface 3068 of the weighing pan support 306 play a role of fixing up and down, and at this time, the elastic limiting structure 304 is not stuck in the notch 3021; ​​then the counterweight 302 is moved in a rotational or translational manner, so that the notch 3021 is engaged with the elastic limiting structure 304, and the counterweight 302 is fixed in the horizontal direction.

[0074] Corresponding to the above embodiment, the disassembly process of the weighing pan assembly is: within the space defined by the weighing pan 301 and the weighing pan bracket 306, the counterweight 302 is moved by methods such as translation, movement, etc., until the counterweight body squeezes the non-notch portion 3022, the notch portion 3021 and the elastic limiting structure 304 are separated, and at this time, the elastic limiting structure 304 no longer restricts the movement of the counterweight 302, and then the counterweight 302 is taken out by translation.

[0075] Back to Figure 3In some embodiments, the scale pan support 306 further includes a fixing structure 307, and the fixing structure 307 is used to apply a pre-tightening force to the scale pan 301 to keep the scale pan 301 and the scale pan support 306 stable.

[0076] In some embodiments, the weighing pan 301 includes a horizontal pan surface 3012, a circumferential side surface 3013, and an inclined side surface 3014, wherein the circumferential side surface 3013 is connected to the horizontal pan surface 3012 via the inclined side surface 3014. The fixing structure 307 applies a downwardly inclined pre-tightening force to the inclined side surface 3014, so that the weighing pan support and the weighing pan can be effectively connected, thereby completing the fixing of the entire weighing pan system 30. In other embodiments, the fixing structure 307 may also directly apply a radial pre-tightening force to the circumferential side surface 3013 of the weighing pan 301, so that the weighing pan 301 is clamped on the weighing pan support 306.

[0077] In some embodiments, the fixing structure 307 includes an elastic part 3071 and a limiting part 3072, and the limiting part 3072 includes an arc surface for matching with the surface of the scale pan 301, such as the elastic part 3071 is a cantilever beam, and the limiting part 3072 is a limiting bead, so as to avoid damage to the surface of the scale pan 301. After the scale pan 301 is placed on the scale pan support 306, the elastic part 3071 is squeezed outward or squeezed obliquely upward due to the interference fit, thereby providing squeezing force on the scale pan 301, so that the scale pan support 306 clamps the scale pan 301.

[0078] Preferably, the weighing pan support 306 includes a plurality of symmetrically distributed fixing structures 307 to achieve symmetrical, multi-point fixation of the weighing pan 301 .

[0079] In order to meet certain requirements during weighing, based on the above embodiment, the scale pan 301 can be allowed to overcome the squeezing force of the elastic part 3071 to achieve its own rotation. In other embodiments, such as when weighing, the scale pan 301 is required to remain stationary, and the scale pan 301 can also include a groove 3011 for engaging with the limit part 3072 to limit the movement of the scale pan 301 to meet the requirements of different application scenarios.

[0080] It is understandable that the scale pan assembly includes a number of counterweights 302 with different shapes and / or thicknesses and / or materials, and any counterweight 302 can be interchangeably matched with the scale pan bracket to adjust the counterweight parameters. By adjusting the shape, thickness or material of the counterweight 302, the weight of the counterweight 302 is adjusted, thereby adjusting the weight of the entire scale pan system 30, and the weighing requirements of different balance sensors can be met.

[0081] For example, when the counterweight needs to be reduced, a counterweight with multiple through holes on the surface or a thin counterweight can be selected to meet the use requirements. Therefore, by adjusting the counterweight, using the same scale pan and scale pan bracket, and thus adjusting the weight of the entire scale pan system, the weighing requirements of different balance sensors can be adapted, reducing waste and saving parts costs.

[0082] The shape of the counterweight block 302 can also be matched with the shape of the bottom surface of the scale pan support 306. For example, if the bottom surface of the scale pan support 306 includes a raised platform 3066, a groove for accommodating the raised platform 3066 can be reserved in the counterweight block 302.

[0083] Combined with the above introduction to the weighing pan assembly, one can also understand an electronic balance, which includes a windshield, a balance housing and the above-mentioned weighing pan assembly, eliminates the gluing process in the original weighing pan, realizes a replaceable design of the counterweight block, solves the problems of high process cost and insufficient reliability in existing products, and effectively improves production efficiency.

[0084] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0085] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A weighing pan assembly (30), comprising a stacked weighing pan (301) and a weighing pan support (306), characterized in that: Also includes: A counterweight (302) is arranged between the weighing pan (301) and the weighing pan support (306), and comprises a notch portion (3021) and a non-notch portion (3022) located on the counterweight; The scale pan support (306) includes an elastic limiting structure (304); The notch portion (3021) is used to accommodate the elastic limiting structure (304) to limit the counterweight (302), and the non-notch portion (3022) is used to squeeze the elastic limiting structure (304) to allow the counterweight (302) to move.

2. The weighing pan assembly according to claim 1, characterized in that: The elastic limiting structure (304) comprises an elastic member (3041) and a limiting member (3042) connected to the elastic member (3041).

3. The weighing pan assembly according to claim 2, characterized in that: The bottom surface of the non-notch portion (3022) is configured to be able to squeeze the limiting member (3042) so as to apply pressure to the elastic member (3041) along the axial direction of the counterweight block (302).

4. The weighing pan assembly according to claim 2, characterized in that: The outer side surface of the non-notch portion (3022) is configured to be able to squeeze the limiting member (3042) so as to apply pressure to the elastic member (3041) along the radial direction of the counterweight block (302).

5. The weighing pan assembly according to any one of claims 2 to 4, characterized in that: The elastic member (3041) is an elastic cantilever beam.

6. The weighing pan assembly according to any one of claims 2 to 5, characterized in that: The notch portion (3021) includes an inlet channel (3029) and an internal chamber (3028), and the maximum cross-sectional width of the inlet channel (3029) is smaller than the minimum width of the limiting member (3042), so that the limiting member (3042) can be inserted into the internal chamber (3028) through the inlet channel (3029).

7. The weighing pan assembly according to any one of claims 1 to 6, characterized in that: The notch portion (3021) comprises an arc-shaped surface in contact with the limiting member (3042).

8. The weighing pan assembly according to any one of claims 1 to 7, characterized in that: The weighing pan support (306) further comprises a positioning structure (305) which is located above the counterweight (302) supported by the weighing pan support (306) and is used to fix the counterweight (302) together with the bottom surface of the weighing pan support (306).

9. The weighing pan assembly according to claim 8, characterized in that: The outer shape of the positioning structure (305) is complementary to the outer shape of the notch portion (3021), or the cross-sectional area of ​​the positioning structure (305) is smaller than the cross-sectional area of ​​the notch portion (3021).

10. The weighing pan assembly according to claim 9, characterized in that: The positioning structure (305) is arranged on the installation path of the counterweight block (302) to the scale pan bracket (306), and is arranged to guide the installation of the counterweight block (302) by means of the cooperation between the positioning structure (305) and the notch portion (3021) during installation.

11. The weighing pan assembly according to any one of claims 1 to 10, characterized in that: The weighing pan support (306) further comprises a fixing structure (307), wherein the fixing structure (307) is used to apply a pre-tightening force to the weighing pan (301) so as to keep the weighing pan (301) and the weighing pan support (306) in a relatively stable state.

12. The weighing pan assembly according to claim 11, characterized in that: The fixing structure (307) applies a radial pre-tightening force to the circumferential side surface (3013) of the weighing pan (301).

13. The weighing pan assembly according to claim 11, characterized in that: The weighing pan (301) comprises a horizontal disk surface (3012), a circumferential side surface (3013) and an inclined side surface (3014); the circumferential side surface (3013) is connected to the horizontal disk surface (3012) via the inclined side surface (3014); and the fixing structure (307) applies a pre-tightening force to the inclined side surface (3014).

14. The weighing pan assembly according to claim 11, characterized in that: The fixing structure (307) comprises an elastic portion (3071) and a limiting portion (3072), and the limiting portion (3072) comprises a curved surface for cooperating with the surface of the weighing pan (301).

15. The weighing pan assembly according to claim 14, characterized in that: The elastic portion (3071) is a cantilever beam, and the limiting portion (3072) is a limiting bead.

16. The weighing pan assembly according to claim 14, characterized in that: The weighing pan (301) further comprises a groove (3011) for engaging with the limiting portion (3072) to limit the movement of the weighing pan (301).

17. The weighing pan assembly according to any one of claims 1 to 16, characterized in that: The weighing pan assembly includes a number of counterweight blocks with different shapes and / or thicknesses and / or materials, and any of the counterweight blocks can be replaceably arranged between the weighing pan (301) and the weighing pan support (306).

18. An electronic balance, comprising a wind shield system (10) and a balance housing (20), characterized in that: It also comprises a weighing pan assembly (30) as claimed in any one of claims 1 to 17.

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