Disc claw power meter

Abstract

The utility model relates to the technical field of bicycle supplies, and discloses a disc claw power meter which is used for being installed between a crank and a driving chain wheel of a bicycle and comprises a disc claw body, a containing box, a circuit board and a strain gauge, the disc claw body comprises a disc body and at least two connecting pieces, the disc body is used for being connected with the crank, and the connecting pieces are arranged along the periphery of the disc body at intervals. The connecting pieces are used for being connected with a driving chain wheel, the containing boxes are made of plastic, the containing boxes are arranged on the peripheral wall of the disc body and located between every two adjacent connecting pieces, the circuit board is arranged in the containing boxes, and the strain gauges are arranged on the connecting pieces and electrically connected with the circuit board. According to the utility model, the stability of signal transmission of the disc claw power meter can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle article technical field, especially a disc claw power meter. BACKGROUND

[0002] In the bicycle power measurement technology, the disc claw power meter is a common measuring device, widely used in bicycle sports and training. The disc claw power meter is usually installed between the crank and the chainring for measuring the torque and power output generated during cycling.

[0003] In the existing disc claw power meter, the circuit board is arranged on the disc claw body. Since the disc claw body is made of metal material or carbon fiber composite material, it has a shielding effect on the antenna signal. Therefore, after the circuit board is arranged on the disc claw body, the signal of the antenna on the circuit board will be poor in the place surrounded by metal material or carbon fiber composite material, affecting the transmission of the signal. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a disc claw power meter without affecting the transmission of the signal.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A disc claw power meter for installation between the crank and the drive sprocket of a bicycle, comprising:

[0007] A disc claw body comprising a disc body and connecting pieces, the disc body being used to connect with the crank, and the connecting pieces being provided with at least two along the outer periphery of the disc body and being used to connect with the drive sprocket;

[0008] A containing box made of plastic, the containing box being arranged on the outer peripheral wall of the disc body and located between the two adjacent connecting pieces;

[0009] A circuit board arranged in the containing box;

[0010] Strain gauges arranged on the connecting pieces and electrically connected with the circuit board.

[0011] Preferably, it further comprises a front cover and a cover body, the front cover being arranged on the front side of the disc claw body and the side surface of the front cover extending outward to form a box body outside the disc body, one side of the box body being provided with an opening, and the cover body being arranged on the opening to form the containing box together with the box body.

[0012] Preferably, the front cover and the box body are integrally injection molded.

[0013] Preferably, a back cover is further included, which is arranged at the back side of the disc claw body, and the cover body is connected to the side of the back cover.

[0014] Preferably, the cover body and the back cover are integrally injection molded.

[0015] Preferably, a battery is further included, which is arranged in the accommodating box and electrically connected to the circuit board.

[0016] Preferably, two connection members are circumferentially distributed on the outer periphery of the disc body, the connection member includes two connection beams, one end of the connection beam is connected to the disc body, the other end of the connection beam extends away from the disc body, the two connection beams are symmetrically and obliquely arranged, and the distance between the two connection beams gradually decreases from the direction close to the disc body.

[0017] Preferably, a receiving groove is arranged on the front side or the back side of the connection beam, and the strain gauge is arranged in the receiving groove.

[0018] Preferably, a connecting hole is arranged at the end of the connection beam away from the disc body.

[0019] Preferably, the accommodating box is made of PC, ABS, PP, PE or PU.

[0020] Compared with the prior art, the disc claw power meter has the beneficial effects that:

[0021] In the utility model, the circuit board is installed and fixed through the accommodating box containing the circuit board, then the accommodating box is arranged on the outer peripheral wall of the disc body, so that the disc claw body does not surround the circuit board in the accommodating box, the disc claw body does not shield the antenna on the circuit board, and the accommodating box is made of plastic material, so the accommodating box also does not shield the antenna on the circuit board, thereby the stability of signal transmission of the disc claw power meter can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is the back view schematic diagram of the utility model embodiment;

[0023] Fig. 2 is the front view schematic diagram of the utility model embodiment;

[0024] Fig. 3 is the explosion view of the utility model embodiment.

[0025] In the figure, 1. Disc claw body; 11. Disc body; 111. Spline groove; 12. Connector; 121. Connecting beam; 122. Connecting hole; 123. Receiving groove; 2. Receiving box; 21. Cover; 22. Box body; 3. Circuit board; 4. Strain gauge; 5. Front cover; 6. Rear cover; 7. Battery; 8. Magnetic charging connector. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] In the description of this utility model, it should be understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, parts, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts, components, and / or groups thereof. It should be understood that when we say a part is "connected" to another part, it can be directly connected to the other part, or there may be intermediate parts. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0028] like Figs. 1 to 3 As shown, this utility model relates to a disc power meter for installation between the crank and drive sprocket of a bicycle. It includes a disc body 1, a housing 2, a circuit board 3, and strain gauges 4. The disc body 1 includes a disc 11 and connecting members 12. The disc 11 is used to connect to the crank. At least two connecting members 12 are spaced apart along the outer periphery of the disc 11 and are used to connect to the drive sprocket. The housing 2 is made of plastic and is located on the outer peripheral wall of the disc 11, between two adjacent connecting members 12. The circuit board 3 is located inside the housing 2, and the strain gauges 4 are located on the connecting members 12 and are electrically connected to the circuit board 3.

[0029] In this utility model, a housing box 2 is provided to accommodate the circuit board 3 for mounting and fixing. The housing box 2 is then placed on the outer peripheral wall of the disk body 11, so that the disk claw body 1 does not surround the circuit board 3 inside the housing box 2, and the disk claw body 1 does not shield the antenna on the circuit board 3. Furthermore, the housing box 2 is made of plastic material, so it does not shield the antenna on the circuit board 3. Therefore, the stability of the signal transmission of the disk claw power meter can be ensured.

[0030] In some embodiments, the disc claw power meter further comprises a front cover 5 and a cover body 21, the front cover 5 is arranged on the front side of the disc claw body 1, and the side of the front cover 5 extends outward to form a box body 22 outside the disc body 11, one side of the box body 22 is provided with an opening, and the cover body 21 is arranged on the opening, and the box body 22 and the cover body 21 jointly form the containing box 2.

[0031] By fixing the front cover 5 on the front side of the disc body 11, then the side of the front cover 5 is provided with the box body 22, so that the box body 22 can be stably arranged outside the periphery of the disc body 11, then the opening of the box body 22 is provided with the cover body 21, and the circuit board 3 is arranged in the box body 22, so that the circuit board 3 can be stably arranged outside the disc claw body 1, and the signal transmission stability of the antenna on the circuit board 3 is not affected.

[0032] Preferably, the front cover 5 and the box body 22 are integrally injection molded. Thus, the stability of the connection between the front cover 5 and the box body 22 can be ensured, so that the containing box 2 can be stably arranged outside the disc body 11, and the front cover 5 and the box body 22 are easier to manufacture and have low production cost.

[0033] In some embodiments, the disc claw power meter further comprises a rear cover 6, the rear cover 6 is arranged on the rear side of the disc claw body 1, and the cover body 21 is connected to the side of the rear cover 6.

[0034] That is, by fixing the rear cover 6 on the rear side of the disc body 11, and then connecting the cover body 21 to the side of the rear cover 6, the stability of the position of the cover body 21 can be ensured, so that the cover body 21 can be stably arranged on the opening of the box body 22 and better wrap and protect the circuit board 3.

[0035] Preferably, the cover body 21 and the rear cover 6 are integrally injection molded. Thus, the stability of the connection between the cover body 21 and the rear cover 6 can be ensured, and the cover body 21 and the rear cover 6 are easier to manufacture and can save manufacturing cost.

[0036] In some embodiments, the disc claw power meter further comprises a battery 7, the battery 7 is arranged in the containing box 2, and the battery 7 is electrically connected with the circuit board 3.

[0037] By arranging the battery 7, power supply can be realized, and the battery 7 is arranged in the containing box 2 to protect the battery 7.

[0038] In some embodiments, the disc body 11 is provided with two connection members 12 along the circumference of the disc body 11, the connection member 12 comprises two connection beams 121, one end of the connection beam 121 is connected with the disc body 11, the other end of the connection beam 121 extends away from the disc body 11, the two connection beams 121 are symmetrically and obliquely arranged, and the distance between the two connection beams 121 gradually decreases from the direction close to the disc body 11.

[0039] Since the disc body 11 is disc-shaped, when the distance between the two connection beams 121 gradually decreases from the direction close to the disc body 11, the two ends of the two connection beams 121 connected with the disc body 11 are close to each other, the length of the connection beam 121 can be reduced, and the weight of the disc claw power meter can be reduced.

[0040] Preferably, the connection beam 121 is integrally formed with the disc body 11, so as to ensure the stability of the connection between the connection beam 121 and the disc body 11.

[0041] In some embodiments, a receiving groove 123 is formed on the front side or the rear side of the connection beam 121, and the strain gauge 4 is arranged in the receiving groove 123. Thus, the strain gauge 4 can be protected, the strain gauge 4 is less affected, and the measurement accuracy is ensured.

[0042] In some embodiments, a connecting hole 122 is formed at the end of the connection beam 121 away from the disc body 11.

[0043] By forming the connecting hole 122 at the end of the connection beam 121 away from the disc body 11, the disc claw power meter can be stably installed by screwing the bolt through the connecting hole 122 and locking it on the driving sprocket.

[0044] In some embodiments, the receiving box 2 is made of PC, ABS, PP, PE or PU. Thus, the signal transmission of the antenna on the circuit board 3 is not affected.

[0045] In some embodiments, a spline groove 111 is formed in the middle of the disc body 11, so that the disc body 11 is used to connect with the crank.

[0046] In some embodiments, a magnetic charging connector 8 is arranged on one side of the receiving box 2, and the magnetic charging connector 8 is electrically connected with the circuit board 3.

[0047] The above description is only the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should be considered as the protection scope of the present application.

Claims

1. A disc claw power meter for mounting between a crank and a drive sprocket of a bicycle, characterized in that, The application relates to a disc claw body, a containing box, a circuit board, a strain sheet and a front cover. The disc claw body comprises a disc body and connecting pieces, the disc body is used for being connected with a crank, the connecting pieces are arranged at intervals along the outer periphery of the disc body, and the connecting pieces are used for being connected with a driving chain wheel. The containing box is made of plastic, is arranged on the outer peripheral wall of the disc body, and is located between two adjacent connecting pieces. The circuit board is arranged in the containing box. The strain sheet is arranged on the connecting piece and is electrically connected with the circuit board.

2. The disc jaw power meter of claim 1, wherein, The front cover is arranged on the front side of the disc claw body, the side of the front cover extends outward to form a box body outside the disc body, one side of the box body is provided with an opening, and a cover body is arranged on the opening.

3. The disc jaw power meter of claim 2, wherein, The front cover and the box body are integrally injection molded.

4. The disc jaw power meter of claim 2, wherein, The rear cover is arranged on the rear side of the disc claw body, and the cover body is connected to the side of the rear cover.

5. The disc jaw power meter of claim 4, wherein, The cover body and the rear cover are integrally injection molded.

6. The disc jaw power meter of claim 1, wherein, The battery is arranged in the containing box and is electrically connected with the circuit board.

7. The disc jaw power meter of claim 1, wherein, The outer periphery of the disc body is circumferentially uniformly distributed with two connecting pieces, the connecting piece comprises two connecting beams, one end of the connecting beam is connected with the disc body, the other end of the connecting beam extends away from the disc body, the two connecting beams are symmetrically and obliquely arranged, and the distance between the two connecting beams gradually decreases from the direction close to the disc body.

8. The disc jaw power meter of claim 7, wherein, The front side or the rear side of the connecting beam is provided with a containing groove, and the strain sheet is arranged in the containing groove.

9. The disc jaw power meter of claim 7, wherein, The end of the connecting beam away from the disc body is provided with a connecting hole.

10. The disc jaw power meter of claim 1, wherein, The containing box is made of PC, ABS, PP, PE or PU.

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