Counting ruler for rotating-body-shaped articles and using method of counting ruler
By designing a counting ruler for rotary body-like items, using the hinge structure and comparison table of the ruler part, the problems of low metrology efficiency and error prone in the prior art are solved, and fast and accurate item measurement is achieved.
Patent Information
- Application Number
- CN202510274791.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-05-27
AI Technical Summary
In the prior art, when measuring the same type of article with a rotating body and the same diameter, the efficiency is low and the measurement time is long, which can easily lead to fatigue and counting errors.
A counting ruler for rotating body-like items is designed. The corner hinges of the two rulers are hinged, and the ruler scale line and the total number of items are set. The expansion and folding state of the ruler are used, and the relationship between the comparison table is combined to quickly check the number of items.
It improves metrology efficiency, reduces labor intensity and metrology time, and reduces manual counting errors. It is especially suitable for situations where the measurement number is large and the time is long.
Smart Images
Figure CN120046641A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of object number measurement, and in particular to a counting ruler for rotating objects and a use method thereof. Background Art
[0002] Objects with the shape of rotating bodies that people often encounter in daily life mainly include round objects such as coins, game coins, bottle caps, and spherical objects such as glass marbles, ping-pong balls, steel balls, and artificial pearls. Counting objects with the shape of rotating bodies to determine the specific number of objects is a problem that people often encounter.
[0003] In the prior art, people usually count one by one. This method does not take too much time and is not prone to errors when the total number of objects in the shape of a rotating body is particularly small. However, the applicant has found that the prior art has at least the following technical problems:
[0004] In the prior art, the method of counting one by one is adopted. When the total number of the same type of objects with the shape of a rotating body and the same diameter is particularly large, not only the efficiency is low, but also people will get tired after counting for a while, and it is easy to make mistakes in counting the majority or the minority after being tired.
[0005] Therefore, how to propose a counting method that can improve the counting efficiency of the same type of objects with the shape of a rotating body and the same diameter, while preventing people from fatigue and counting errors, has become a counting problem that has not been effectively solved so far. Summary of the invention
[0006] The embodiment of the present invention provides a counting ruler for rotating objects and a method for using the same, which solves the technical problems in the prior art of low measuring efficiency and easy errors when the measuring number is large and the measuring time is long.
[0007] The embodiment of the present invention provides the following technical solutions:
[0008] An embodiment of the present invention provides a counting ruler for rotating solid-shaped objects, the counting ruler for rotating solid-shaped objects comprising two ruler parts hinged together by corner hinges, the counting ruler for rotating solid-shaped objects further comprising ruler scale lines and a comparison table of the total number of rows of objects, the comparison table of the total number of rows of objects recording the corresponding relationship between the number of rows of objects and the total number of objects, wherein:
[0009] Each of the ruler parts is provided with the ruler scale line;
[0010] At least one of the two ruler parts is provided with a comparison table of the total number of rows of articles;
[0011] The two ruler parts can be rotated to an unfolded state and a folded state at the hinge point of the corner hinge. When in the unfolded state, the angle between the two ruler parts is 60° and the item row total number comparison table is located at the top. At this time, the same type of items with the shape of a rotating body and the same diameter are stacked between the two ruler parts so that each row of stacked items is in a full state. The number of items stacked between the two ruler parts can be queried based on the corresponding relationship between the number of rows of items and the total number of items recorded in the item row total number comparison table;
[0012] When in a folded state, the two ruler parts can be folded to a position where they overlap each other and the ruler scale lines are located at the top, and the length of the line segment can be measured according to the ruler scale lines;
[0013] The corresponding relationship between the number of rows of the items and the total number of items satisfies the following formula: N=n(n+1) / 2+a, where: N is the total number of items to be measured; n is the number of rows of items stacked between the two ruler parts when the two ruler parts are in the unfolded state, and the items stacked in each row between the two ruler parts are in a full state; a is the number of items not stacked between the two ruler parts.
[0014] Optionally, each of the ruler portions includes a front section and a rear section hinged to the front section via a trunk hinge, the front section of one of the ruler portions is hinged to the front section of another of the ruler portions via the corner hinges, the total number of rows of items comparison table is set on the rear section of one of the ruler portions, and the front sections of the two ruler portions are the same in length, and the rear sections of the two ruler portions are also the same in size, and the front section can be rotated relative to the rear section via the trunk hinge to a position allowing the items to leak out from the front.
[0015] Optionally, the number of the corner hinges is two and the rotation axis center lines of the two corner hinges coincide. Optionally, when the object is round, the thickness of the ruler portion is greater than 1 / 2 of the thickness of the object; when the object is spherical, the thickness of the ruler portion is greater than the radius of the object. Optionally, an adsorption portion is also arranged on the ruler portion, and the adsorption portion is a reusable adhesive layer coated on the back of the ruler portion and a circular magnet embedded in the reusable adhesive layer; when in the unfolded state, the two ruler portions can be temporarily adsorbed on an external flat plate or desktop through the adsorption portion.
[0016] Optionally, the ruler portion further includes an extension ruler portion, which is a linear structure and the head end of which can be plugged onto the end surface of the rear section of the ruler portion through an extension interface to extend the length of the ruler portion.
[0017] Optionally, the extension interface comprises an outer convex portion and an inner concave portion detachably plugged with the outer convex portion, the inner concave portion is arranged at the rear section, the cross section of the outer convex portion is in a "convex" shape, the outer convex portion is arranged at the head end of the extension ruler portion, and the tail end of the extension ruler portion is provided with a concave portion with the same structure as the inner concave portion;
[0018] An adsorption component capable of adsorbing the outer convex portion and the inner concave portion is also provided between the bottom surface of the inner concave portion and the outer convex portion, and the adsorption component includes a first magnet embedded in one of the inner concave portion and the outer convex portion and a second magnet embedded in the other of the inner concave portion and the outer convex portion.
[0019] Optionally, when a is 0, the content of the item row total number comparison table is:
[0020] Number of rows of items (n) Total quantity (N) 1 1 2 3 3 6 4 10 5 15 6 21 7 28 8 36 9 45 10 55 11 66 12 78 13 91 14 105 15 120 16 136 17 153 18 171 19 190 20 210
[0021] The columns corresponding to the number of rows and the total quantity of items in the item row number and total number comparison table contain reserved spaces, and the reserved spaces can be filled in by yourself.
[0022] Optionally, the counting ruler for rotating objects further comprises two limit plates and two guide baffles, wherein:
[0023] The guide baffle and the outer wall of the top edge of the limit plate are detachably connected by plug-in buckles; the cross section of each guide baffle is "∟", and two guide baffles are spliced to form a rectangular funnel structure, and the diameter of the rectangular funnel structure gradually decreases from top to bottom;
[0024] The limiting plates are both fan-shaped structures with rounded corners. The two limiting plates can clamp the two ruler parts in the unfolded state inside, and the upper and lower surfaces of the two ruler parts can be adsorbed by the two limiting guide discs through the magnetic attraction structure when in the unfolded state.
[0025] The method for using the counting ruler for rotating objects provided by the present invention comprises the following steps:
[0026] Step A: When the two ruler parts of any of the above-mentioned counting rulers for rotating objects provided by the present invention are in an unfolded state, objects of the same kind with a rotating body shape and the same diameter are stacked between the two ruler parts so that each row of the stacked objects is in a full stack state.
[0027] Step B: querying the number of items stacked between the two ruler parts according to the correspondence between the number of rows of items and the total number of items recorded in the comparison table of the number of rows of items;
[0028] Step C: If there are still items left after executing Step A and Step B once, record the value obtained in Step B each time;
[0029] Step D: visually inspect the number of remaining items, and add the visually inspected values of the remaining items to the values of the previously measured items to obtain the total number of items to be measured; or, clear the items stacked between the two ruler portions and perform steps A and B again on the remaining items until all items are measured, and then add the values obtained from each execution of step B to obtain the total number of items to be measured.
[0030] Any of the above technical solutions provided by the embodiments of the present invention produces at least the following technical effects:
[0031] The present invention can stack objects between the two ruler parts when the two ruler parts are rotated to the unfolded state at the hinge points of the corner hinges, and make each row of the stacked objects in a full state. The number of objects stacked between the two ruler parts can be queried according to the correspondence between the number of rows of objects recorded in the comparison table of the total number of rows of objects and the total number of objects. If there are unstacked objects, the number of unstacked objects is also limited. Only simple addition is needed to quickly measure the number of objects of the same type with the shape of a rotating body and the same diameter. Compared with the existing counting method of measuring the same type of objects with the shape of a rotating body and the same diameter by counting one by one in the existing counting method, the measuring efficiency is greatly improved, the labor intensity is greatly reduced, and the measuring time is shorter. Especially in the case where the measuring number is large and the measuring time is long, because it is realized with the help of tools, the time of manual counting is omitted. Even if counting is required, the counting time is greatly reduced, and the situation of errors caused by fatigue of manual counting is avoided. Therefore, the technical problems of low measuring efficiency and easy errors when the measuring number is large and the measuring time is long in the existing technology are solved. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Through the following drawings, those skilled in the art may better understand the technical effects of the present invention.
[0033] Figure 1 A schematic diagram of a counting ruler for rotating objects provided in an embodiment of the present invention switching from an unfolded state to a folded state.
[0034] Figure 2 for Figure 1 The schematic diagram of stacking circular objects in a counting ruler for rotating objects provided by an embodiment of the present invention is shown.
[0035] Figure 3 for Figure 1 FIG. 1 is a schematic diagram of a counting ruler for rotating objects provided by an embodiment of the present invention.
[0036] Figure 4 A schematic diagram of the plugging process between the extended ruler portion and the straight ruler portion of a counting ruler for rotating objects provided in another embodiment of the present invention.
[0037] Figure 5 for Figure 4 The schematic diagram shows that the front section of the counting ruler for rotating objects is rotated to a position allowing the objects to leak out from the front.
[0038] Figure 6 for Figure 4 A three-dimensional schematic diagram of a counting ruler for rotating objects shown.
[0039] Figure 7 for Figure 4 Another three-dimensional schematic diagram of a counting ruler for rotating objects shown.
[0040] Figure 8 for Figure 4 Another three-dimensional schematic diagram of a counting ruler for rotating objects shown.
[0041] Fig. 9 for Figure 4 Another three-dimensional schematic diagram of a counting ruler for rotating objects shown.
[0042] Fig.10 A schematic plan view of a counting ruler for rotating objects provided in another embodiment of the present invention.
[0043] Fig.11 for Fig.10 FIG. 1 is a schematic diagram of the three-dimensional structure of a counting ruler for rotating objects provided by an embodiment of the present invention.
[0044] Fig.12 A schematic diagram of the principle of the use formula of the counting ruler for rotating objects provided in an embodiment of the present invention.
[0045] Markings in the figure: 1. Corner hinge; 2. Ruler part; 21. Front part; 22. Trunk hinge; 23. Back part; 3. Ruler scale lines; 4. Item row total number comparison table; 5. Adsorption part; 51. Repeatedly stickable adhesive layer; 52. Round magnet; 6. Extended ruler part; 7. Extended interface; 71. Outer convex part; 72. Inner concave part; 73. Concave part; 8. Second magnet; 91. Limit plate; 92. Guide baffle; 93. Plug-in buckle. DETAILED DESCRIPTION
[0046] The following is combined with the above Figure 1-Figure 12 The preferred implementation modes and various optional implementation modes provided by the embodiments of the present invention are described in more detail.
[0047] like Figure 1-Figure 12As shown, the counting ruler for rotating solid-shaped objects provided by the embodiment of the present invention comprises two ruler parts 2 hinged together by corner hinges 1, and the counting ruler for rotating solid-shaped objects further comprises ruler scale lines 3 and a comparison table 4 for the total number of rows of objects, wherein the comparison table 4 for the total number of rows of objects records the corresponding relationship between the number of rows of objects and the total number of objects, wherein:
[0048] Each ruler portion 2 is provided with a ruler scale line 3;
[0049] At least one of the two ruler parts 2 is provided with a comparison table 4 of the total number of rows of articles;
[0050] The two ruler parts 2 can be rotated to an unfolded state and a folded state at the hinge point of the corner hinge 1. When in the unfolded state, the angle between the two ruler parts 2 is 60° (the angle between the inner side of each ruler part 2 and the symmetry center line of the two ruler parts 2 is 30°, so the two ruler parts 2 are assembled to obtain the 60° angle when they are in the unfolded state) and the total number of rows of items comparison table 4 is located at the top. At this time, the same type of items with the shape of a rotating body and the same diameter (such as coins with the same diameter or glass marbles with the same diameter) are stacked between the two ruler parts 2 and each row of stacked items is in a full state. According to the corresponding relationship between the number of rows of items and the total number of items recorded in the total number of rows of items comparison table 4, the number of items stacked between the two ruler parts 2 can be queried;
[0051] When in the folded state, the two ruler parts 2 can be folded to a position where they overlap each other and the ruler scale lines 3 are located at the top, and the length of the line segment can be measured according to the ruler scale lines 3;
[0052] The corresponding relationship between the number of rows of items and the total number of items satisfies the following formula:
[0053] N=n(n+1) / 2+a, where: N is the total number of items to be measured; n is the number of rows of items stacked between the two ruler parts 2 when the two ruler parts 2 are in the unfolded state, and the items stacked in each row between the two ruler parts 2 are in a full state; a is the number of items not stacked between the two ruler parts 2 (scattered outside the two ruler parts 2).
[0054] The present invention can stack objects between the two ruler parts 2 and make each row of stacked objects in a full state when the two ruler parts 2 are rotated to the unfolded state at the hinge point of the corner hinge 1. The number of objects stacked between the two ruler parts 2 can be queried based on the correspondence between the number of rows of objects and the total number of objects recorded in the comparison table 4 of the total number of rows of objects. If there are unstacked objects, the number of unstacked objects is also limited. Only simple addition is required to quickly measure the number of the same type of objects with the shape of a rotating body and the same diameter. Compared with the existing counting method of measuring the same type of objects with the shape of a rotating body and the same diameter by counting one by one, the measuring efficiency is greatly improved, the labor intensity is greatly reduced, and the measuring time is shorter. Especially for the case where the measuring number is large and the measuring time is long, because it is achieved with the help of tools, the time for manual counting is omitted. Even if counting is required, the counting time is greatly reduced, avoiding the occurrence of errors caused by manual counting fatigue.
[0055] This application Figure 1-Figure 9 The solution has the advantages of simple structure, low cost, and easy portability, use and promotion.
[0056] like Fig.12 As shown, Fig.12 The left part of the middle figure and the middle part of the figure are two rotating object counting rulers with exactly the same number of circular objects. When the two ruler parts 2 of the two are in the unfolded state, the number of rows of objects stacked between the two ruler parts 2 is n, n=3. The right part of the figure obtained by superimposing the objects of the two has the number of columns (n+1)=4. The total number of objects in the two rotating object counting rulers=n(n+1)=12, and the total number of objects in the single rotating object counting ruler is N=n(n+1) / 2=6. If there are objects that are not stacked between the two ruler parts 2 (scattered outside the two ruler parts 2) and their number is a, then the formula N=n(n+1) / 2+a can be obtained;
[0057] As an optional implementation, in the present embodiment, each ruler portion 2 includes a front section 21 and a rear section 23 hinged to the front section 21 through a trunk hinge 22, the length of the rear section 23 can be at least twice the length of the front section 21, the front section 21 of one ruler portion 2 is hinged to the front section 21 of another ruler portion 2 through a corner hinge 1, the total number of item rows comparison table 4 is set on the rear section 23 of one ruler portion 2, and the length of the front section 21 of each of the two ruler portions 2 is the same, and the size of the rear section 23 of each of the two ruler portions is also the same, and the front section 21 can be rotated relative to the rear section 23 through the trunk hinge 22 to a position allowing items to leak out from the front.
[0058] When the rotating body-shaped object provided by the present invention is adsorbed on a vertical or inclined flat plate (such as a blackboard) by using the counting ruler, the front section 21 of the ruler part 2 can be turned up to quickly allow the same type of objects with the shape of a rotating body and the same diameter to leak out from the front by gravity to facilitate the collection of the objects. Of course, the front section 21 of the ruler part 2 can also be turned up on a horizontal table or flat plate, and in this case, it is pushed out by hand. For example, a pile of objects are placed on the horizontal table, and the number of objects is counted in the middle of the ruler part 2. After counting, the front section 21 of the ruler part 2 is turned up and the opening is moved to the bottom of the table, and gravity is not necessarily required.
[0059] As an optional implementation, in this embodiment, the number of corner hinges 1 can be two (the specific number can also be 1 or more than two) and the rotation axis center lines of the two corner hinges 1 coincide. The use of two corner hinges 1 can improve the connection reliability of the connection structure on the one hand, and on the other hand, the two corner hinges 1 can ensure the accuracy of the angle between the two ruler parts 2, thereby ensuring the accuracy of the object measurement.
[0060] As an optional implementation, in this embodiment, when the object is round, the thickness of the ruler part 2 is greater than 1 / 2 of the thickness of the object; when the object is spherical, the thickness of the ruler part 2 is greater than the radius of the object. The above thickness requirement of the ruler part 2 can effectively prevent the object from falling out of the ruler part 2 during the measurement process. When the thickness of the ruler part 2 is low, it also has the advantages of being light and low cost.
[0061] As an optional implementation, in this embodiment, an adsorption portion 5 is further arranged on the ruler portion 2, and the adsorption portion 5 is a repeatedly sticky adhesive layer 51 coated on the back of the ruler portion 2 (the repeatedly sticky adhesive layer can be made of strong or weak double-sided tape or silicone) and a circular magnet 52 embedded in the repeatedly sticky adhesive layer 51; when in the unfolded state, the two ruler portions 2 can be temporarily adsorbed on an external flat plate or desktop through the adsorption portion 5.
[0062] The circular magnet 52 can adsorb a blackboard or a flat plate with magnetic attraction, and the repeatedly adhesive layer 51 can be adsorbed on a flat desktop. The setting of the adsorption part 5 can prevent the ruler part 2 from being deflected due to the impact of objects during the measurement process, avoid frequent adjustment of the position accuracy of the ruler part 2, and thus improve the overall speed of object stacking and measurement.
[0063] As an optional implementation, the ruler portion 2 in this embodiment further includes an extension ruler portion 6, which is a linear structure and the head end of the extension ruler portion 6 can be plugged into the end surface of the rear section 23 of the ruler portion 2 through an extension interface 7 to extend the length of the ruler portion 2. The provision of the extension ruler portion 6 can increase the length of the ruler portion 2, thereby increasing the size and number of items that can be measured.
[0064] As an optional implementation, the extension interface 7 in this embodiment includes an outer convex portion 71 and an inner concave portion 72 that is detachably plugged into the outer convex portion 71, the inner concave portion 72 is arranged on the rear section 23, the cross-section of the outer convex portion 71 is in a "convex" shape, the outer convex portion 71 is arranged at the head end of the extension ruler portion 6, and the tail end of the extension ruler portion 6 is provided with a recessed portion 73 with the same structure as the inner concave portion 72.
[0065] The above structure facilitates the alignment and plugging operation of the extended ruler portion 6 and the straight ruler portion 2, thereby helping to improve assembly efficiency and measurement speed.
[0066] As an optional implementation, in this embodiment, an adsorption component capable of adsorbing the outer convex part 71 and the inner concave part 72 is further provided between the bottom surface of the inner concave part 72 and the outer convex part 71, and the adsorption component includes a first magnet embedded in one of the inner concave part 72 and the outer convex part 71 and a second magnet 8 embedded in the other of the inner concave part 72 and the outer convex part 71. The provision of the adsorption component improves the reliability of the connection between the inner concave part 72 and the outer convex part 71, thereby ensuring the accuracy and efficiency of the measurement.
[0067] As an optional implementation, in this embodiment, when a is 0, the content of the total number of item rows comparison table 4 is:
[0068] Number of rows of items (n) Total quantity (N) 1 1 2 3 3 6 4 10 5 15 6 21 7 28 8 36 9 45 10 55 11 66 12 78 13 91 14 105 15 120 16 136 17 153 18 171 19 190 20 210
[0069] The columns corresponding to the number of rows and total quantity of items in the comparison table 4 contain reserved spaces, which can be filled in by yourself. The number of rows and total quantity of items can be filled in more rows according to actual needs.
[0070] The reserved spaces facilitate operators to fill in the required corresponding data according to the actual number of items measured, thereby improving the flexibility and versatility of use.
[0071] As an optional implementation, in this embodiment, the counting ruler for rotating objects further includes two limit plates 91 and two guide baffles 92, wherein:
[0072] The guide baffle 92 and the outer wall of the top edge of the limiting plate 91 are detachably connected by inserting the buckle 93;
[0073] The cross section of each guide baffle 92 is in the shape of a “∟”. Two guide baffles 92 are spliced together to form a rectangular funnel structure, and the diameter of the rectangular funnel structure gradually decreases from top to bottom.
[0074] The limiting plates 91 are both fan-shaped structures with rounded corners. The two limiting plates 91 can clamp the two ruler parts 2 in the unfolded state, and the upper and lower surfaces of the two ruler parts 2 can be adsorbed to the two limiting guide discs through the magnetic attraction structure when in the unfolded state.
[0075] The arrangement of the limiting plate 91 and the guide baffle 92 facilitates the rapid stacking of objects between the two ruler portions 2, thereby improving the efficiency of measurement, especially when a large number of objects are to be measured, greatly improving the speed of stacking the objects.
[0076] The method for using the counting ruler for rotating objects provided by the present invention comprises the following steps:
[0077] Step A: When the two ruler parts 2 of any of the above-mentioned counting rulers for rotating objects provided by the present invention are in an unfolded state, objects of the same kind with the shape of rotating objects and the same diameter are stacked between the two ruler parts 2 so that each row of the stacked objects is in a full state.
[0078] Step B: Query the number of items stacked between the two ruler parts 2 according to the correspondence between the number of rows of items and the total number of items recorded in the comparison table of the number of rows of items;
[0079] Step C: If there are still items left after executing Step A and Step B once, record the value obtained in Step B each time;
[0080] Step D: visually inspect the number of remaining items, and add the visually inspected remaining item values to the previously measured item values to obtain the total number of items to be measured; or, clear the items stacked between the two ruler parts 2 and execute steps A and B again for the remaining items until all items are measured, and then accumulate the values obtained from each execution of step B to obtain the total number of items to be measured.
[0081] The above technical solutions are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A counting ruler for rotating objects, characterized in that: The rotating object counting ruler comprises two ruler parts hinged together by corner hinges, and the rotating object counting ruler also comprises ruler scale lines and a comparison table of the total number of rows of objects, wherein the comparison table of the total number of rows of objects records the corresponding relationship between the number of rows of objects and the total number of objects, wherein: Each of the ruler parts is provided with the ruler scale line; At least one of the two ruler parts is provided with a comparison table of the total number of rows of articles; The two ruler parts can be rotated to an unfolded state and a folded state at the hinge point of the corner hinge. When in the unfolded state, the angle between the two ruler parts is 60° and the item row total number comparison table is located at the top. At this time, the same type of items with the shape of a rotating body and the same diameter are stacked between the two ruler parts so that each row of stacked items is in a full state. The number of items stacked between the two ruler parts can be queried based on the corresponding relationship between the number of rows of items and the total number of items recorded in the item row total number comparison table; When in a folded state, the two ruler parts can be folded to a position where they overlap each other and the ruler scale lines are located at the top, and the length of the line segment can be measured according to the ruler scale lines; The corresponding relationship between the number of rows of the items and the total number of items satisfies the following formula: N=n(n+1) / 2+a, where: N is the total number of items to be measured; n is the number of rows of items stacked between the two ruler parts when the two ruler parts are in the unfolded state, and the items stacked in each row between the two ruler parts are in a full state; a is the number of items not stacked between the two ruler parts.
2. The counting ruler for rotating objects according to claim 1, characterized in that: Each of the ruler parts includes a front section and a rear section hinged to the front section through a trunk hinge. The front section of one of the ruler parts is hinged to the front section of another of the ruler parts through the corner hinge. The total number of rows of items comparison table is set on the rear section of one of the ruler parts. The length of the front sections of the two ruler parts is the same, and the size of the rear sections of the two ruler parts is also the same. The front section can be rotated relative to the rear section through the trunk hinge to a position allowing the items to leak out from the front.
3. The counting ruler for rotating objects according to claim 2, characterized in that: The number of the corner hinges is two and the rotation axis centers of the two corner hinges coincide.
4. The counting ruler for rotating objects according to claim 2, characterized in that: When the object is round, the thickness of the ruler portion is greater than 1 / 2 of the thickness of the object; when the object is spherical, the thickness of the ruler portion is greater than the radius of the object.
5. The counting ruler for rotating objects according to claim 2, characterized in that: The ruler portion is also provided with an adsorption portion, which is a repeatedly sticky adhesive layer coated on the back of the ruler portion and a circular magnet embedded in the repeatedly sticky adhesive layer; when in the unfolded state, the two ruler portions can be temporarily adsorbed on an external flat plate or desktop through the adsorption portion.
6. The counting ruler for rotating objects according to claim 2, characterized in that: The ruler part also includes an extension ruler part, which is a linear structure and the head end of the extension ruler part can be plugged into the end surface of the rear section of the ruler part through an extension interface to extend the length of the ruler part.
7. The counting ruler for rotating objects according to claim 6, characterized in that: The extension interface comprises an outer convex portion and an inner concave portion which is detachably plugged with the outer convex portion, the inner concave portion is arranged at the rear section, the cross section of the outer convex portion is in the shape of a "convex" character, the outer convex portion is arranged at the head end of the extension ruler portion, and the tail end of the extension ruler portion is provided with a concave portion having the same structure as the inner concave portion; An adsorption component capable of adsorbing the outer convex portion and the inner concave portion is also provided between the bottom surface of the inner concave portion and the outer convex portion, and the adsorption component includes a first magnet embedded in one of the inner concave portion and the outer convex portion and a second magnet embedded in the other of the inner concave portion and the outer convex portion.
8. The counting ruler for rotating objects according to claim 1, characterized in that: When a is 0, the content of the item row total comparison table is: The columns corresponding to the number of rows and the total quantity of items in the item row number and total number comparison table contain reserved spaces, and the reserved spaces can be filled in by yourself.
9. The counting ruler for rotating objects according to claim 1, characterized in that: The counting ruler for rotating objects also includes two limit plates and two guide baffles, wherein: The guide baffle and the outer wall of the top edge of the limiting plate are detachably connected by plugging and buckling; The cross section of each guide baffle is in the shape of "∟", and two guide baffles are spliced to form a rectangular funnel structure, the diameter of which gradually decreases from top to bottom; The limiting plates are both fan-shaped structures with rounded corners. The two limiting plates can clamp the two ruler parts in the unfolded state inside, and the upper and lower surfaces of the two ruler parts can be adsorbed by the two limiting guide discs through the magnetic attraction structure when in the unfolded state.
10. A method for using a counting ruler for a rotating object according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step A: When the two straight ruler parts of the counting ruler for rotating objects according to any one of claims 1 to 9 are in an unfolded state, objects of the same kind with a rotating body shape and the same diameter are stacked between the two straight ruler parts so that each row of the stacked objects is in a full state. Step B: querying the number of items stacked between the two ruler parts according to the correspondence between the number of rows of items and the total number of items recorded in the comparison table of the number of rows of items; Step C: If there are still items left after executing Step A and Step B once, record the value obtained in Step B each time; Step D: visually inspect the number of remaining items, and add the visually inspected values of the remaining items to the values of the previously measured items to obtain the total number of items to be measured; or, clear the items stacked between the two ruler portions and perform steps A and B again on the remaining items until all items are measured, and then add the values obtained from each execution of step B to obtain the total number of items to be measured.