A device for detecting the rotational speed of a record on a record player

Abstract

The utility model relates to a record player technical field, concretely relates to a record player record speed detection device, including record player main part, the inside fixed mounting of record player main part has record player motor, the top fixed mounting of record player motor output shaft has record placement tray, the bottom of record player main part and located record player motor output shaft's bottom fixed mounting has detection box, the outside fixed connection of detection box with record player main part through two groups of fixed mechanism, the bottom fixed mounting of detection box has box lid, the inside rotatory joint of detection box has grating gear plate, the inside of detection box and located the outside fixed mounting of grating gear plate has detection head, the upper and lower both ends of grating gear plate all fixed connection has connector, the utility model discloses through the design of modular plug -in structure, sealing protection and fixed mechanism, has realized high accuracy measurement and quick maintenance of rotational speed, has improved equipment stability and maintenance efficiency significantly to reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of record player technology, specifically to a record player record rotation speed detection device. Background Technology

[0002] A record player generally refers to a phonograph, which is an electric device used to play recorded records. Many modern record players are equipped with intelligent record speed detection devices that can detect the record's rotation speed and adjust it correctly.

[0003] Existing record rotation speed detection devices used in record players generally use a grating sprocket die-cast as a single piece under the record holder. The speed and number of revolutions of the record are calculated by detecting the number of grating sprockets that rotate through it. However, once the grating sprocket is installed inside the record player, if the grating sprocket malfunctions, the entire device needs to be replaced. This not only requires disassembling the entire machine for replacement, but also results in low maintenance convenience and increased maintenance costs.

[0004] Therefore, it is of great importance to design a record player record speed detection device to solve the above-mentioned defects. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model designs a record player record speed detection device, which aims to solve the technical problems of low maintenance convenience and high maintenance cost of existing record player record speed detection devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A record player record rotation speed detection device includes a record player body, a record player motor is fixedly installed inside the record player body, a record placement tray is fixedly installed at the top of the output shaft of the record player motor, and a detection box is fixedly installed at the bottom of the record player body and at the bottom end of the output shaft of the record player motor. The outer side of the detection box is fixedly connected to the record player body through two sets of fixing mechanisms.

[0008] The bottom of the detection box is fixedly installed with a box cover, and an optical grating disk is rotatably connected inside the detection box. A detection head is fixedly installed inside the detection box and outside the optical grating disk. Connectors are fixedly connected to both the upper and lower ends of the optical grating disk, and the bottom end of the record player motor output shaft is inserted into the connector.

[0009] As a preferred embodiment of this utility model, the outer side of the box cover is fixedly connected with two sets of fixing ends, and both sets of fixing ends are fixedly connected to the detection box by fixing screws.

[0010] As a preferred embodiment of this utility model, a sealing groove is provided at the bottom of the inside of the detection box, and the top of the box cover is inserted into the sealing groove through a sealing edge, and a rubber sealing ring is embedded inside the sealing groove.

[0011] As a preferred embodiment of this utility model, the bottom end of the detection head is fixedly connected to two sets of contacts, and the bottom of the record player body is fixedly connected to a power receiving sleeve at a position corresponding to the two sets of contacts, and the contacts are inserted into the power receiving sleeve.

[0012] As a preferred embodiment of this utility model, both the upper and lower ends of the connector are rotatably connected to the detection box and the box cover respectively through bearings, and the bottom end of the record player motor output shaft is fixedly connected to a mating connector, which is inserted into the interior of the connector through a mating slot.

[0013] As a preferred embodiment of this utility model, a record shaft is fixedly connected to the center of the record placement tray.

[0014] As a preferred embodiment of this utility model, the fixing mechanism includes two sets of connecting sleeves fixedly connected to the bottom of the record player body and located outside the detection box. The interior of each of the two sets of connecting sleeves is slidably connected with a locking post. The exterior of each of the two sets of locking posts is fitted with a spring. The exterior of each of the two sets of locking posts and the opposite end of each of the two sets of springs is fixedly connected with a top ring.

[0015] As a preferred embodiment of this utility model, a locking sleeve is fixedly connected to the outer side of the detection box at the position corresponding to the two sets of connecting sleeves, and the locking post is inserted into the locking sleeve.

[0016] As a preferred embodiment of this utility model, a locking post is fixedly connected to the outer side of the top ring, and a locking groove is provided on the outer side of the connecting sleeve at a position corresponding to the locking post.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, through the cooperative design of the record player motor and the detection box, the record player motor drives the record placement tray at the top of the output shaft to rotate. At the same time, the bottom end of the output shaft is inserted into the docking slot of the connector inside the detection box through the connector, driving the grating gear to rotate synchronously. The detection head captures the rotation pulse signal of the grating gear in real time. The signal is transmitted to the control circuit through the bottom contact and the gold-plated plug interface of the electrical sleeve to accurately calculate the record speed. The detection box and the box cover are inserted into the sealing groove through the sealing edge, and the rubber sealing ring isolates dust and moisture, ensuring the long-term stability of the internal sensor. The upper and lower ends of the connector are rotatably connected to the detection box and the box cover through bearings to reduce frictional resistance and ensure that the grating gear rotates smoothly following the motor shaft. This achieves high-precision detection and sealing protection of the record speed, and extends the service life of the detection device.

[0019] 2. In this utility model, through the cooperative design of the record player motor, the detection box, and the fixing mechanism, when the detection box needs to be disassembled for maintenance, pull outwards the two sets of locking pins and rotate the locking pins to make the pins engage with the locking position of the slot. At this time, the locking pins disengage from the locking sleeve of the detection box. Then move the detection box to separate the connector from the motor output shaft. At the same time, the contacts exit the electrical sleeve, and the entire detection box can be removed. Then unscrew the fixing screws, separate the box cover from the detection box, and directly disassemble and install the grating gear plate or the detection head for replacement and maintenance, thereby improving the convenience of maintenance and reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the top structure of the main body of the record player of this utility model;

[0021] Figure 2 This is a schematic diagram of the bottom structure of the main body of the record player of this utility model;

[0022] Figure 3 This is a diagram showing the disassembled state between the detection box and the main body of the record player of this utility model;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the detection box and lid structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the detection box of this utility model;

[0026] Figure 7 This is a schematic diagram of the bottom structure of the detection box of this utility model;

[0027] Figure 8 This is a schematic diagram of the internal structure of the connecting sleeve of this utility model.

[0028] In the diagram: 1. Record player body; 2. Record player motor; 3. Record tray; 301. Record shaft; 4. Detection box; 401. Box cover; 402. Raster gear; 403. Detection head; 404. Connector; 405. Fixed end; 406. Fixing screw; 407. Sealing groove; 408. Rubber sealing ring; 409. Contact point; 410. Electrical connection sleeve; 411. Bearing; 412. Connector; 413. Connecting slot; 5. Fixing mechanism; 501. Connecting sleeve; 502. Locking pin; 503. Spring; 504. Top ring; 505. Locking sleeve; 506. Locking pin; 507. Locking groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0030] Example: Please refer to Figures 1-8 This utility model provides a technical solution:

[0031] A record player record rotation speed detection device includes a record player body 1, a record player motor 2 fixedly installed inside the record player body 1, a record placement tray 3 fixedly installed at the top of the output shaft of the record player motor 2, and a detection box 4 fixedly installed at the bottom of the record player body 1 and at the bottom end of the output shaft of the record player motor 2. The outer side of the detection box 4 is fixedly connected to the record player body 1 by two sets of fixing mechanisms 5.

[0032] First, a cover 401 is fixedly installed at the bottom of the detection box 4. An optical grating disk 402 is rotatably connected inside the detection box 4. A detection head 403 is fixedly installed inside the detection box 4, located outside the optical grating disk 402. Connectors 404 are fixedly connected to both the upper and lower ends of the optical grating disk 402, and the bottom end of the output shaft of the record player motor 2 is inserted into the connector 404. Two sets of fixing ends 405 are fixedly connected to the outside of the cover 401, and both sets of fixing ends 405 are fixedly connected to the detection box 4 by fixing screws 406. The detection box 4 provides a connection between the optical grating disk 402 and the detection head 403. In a closed and stable testing environment, the grating gear disk 402 rotates with the output shaft of the record player motor 2. The rotation is detected by the detection head 403 to calculate the record speed. After the fixing mechanism 5 is used to release the fixing of the testing box 4, the testing box 4 is moved so that the connector 404 is separated from the output shaft of the record player motor 2. The external testing box 4 can be disassembled individually. Then, the fixing screw 406 is unscrewed from the inside of the fixing end 405 to open the box cover 401, so that the grating gear disk 402 inside the testing box 4 can be disassembled and replaced individually, thereby improving the convenience of maintenance and reducing the maintenance cost.

[0033] Furthermore, a sealing groove 407 is provided at the bottom of the inside of the detection box 4. The top of the box cover 401 is inserted into the sealing groove 407 through a sealing edge. A rubber sealing ring 408 is embedded inside the sealing groove 407. After the box cover 401 and the detection box 4 are installed and fixed, the sealing edge at the top of the box cover 401 is inserted into the sealing groove 407, and the rubber sealing ring 408 ensures the airtightness, preventing dust and moisture from entering and affecting the detection accuracy, and extending the service life of the detection device.

[0034] Then, two sets of contacts 409 are fixedly connected to the bottom of the detection head 403. At the bottom of the record player body 1, corresponding to the two sets of contacts 409, a power sleeve 410 is fixedly connected, and the contacts 409 are plugged into the power sleeve 410. The detection head 403 is a Hall or photoelectric sensor that monitors the rotation speed of the grating sprocket 402 in real time and outputs a pulse signal. The two sets of gold-plated copper alloy contacts 409 at the bottom of the detection head 403 are plugged into the gold-plated copper power sleeve 410 at the bottom of the record player body 1, transmitting the signal to the control circuit board inside the record player body 1. The plug-in design supports the quick installation and removal of the detection head 403, which significantly simplifies the maintenance process and further improves the convenience of maintenance.

[0035] Furthermore, both ends of the connector 404 are rotatably connected to the detection box 4 and the box cover 401 respectively via bearings 411. The bottom end of the output shaft of the record player motor 2 is fixedly connected to a connector 412, which is inserted into the interior of the connector 404 via a docking slot 413. The upper and lower ends of the connector 404 are rotatably connected to the detection box 4 and the box cover 401 respectively via bearings 411, reducing frictional resistance and ensuring that the grating gear 402 rotates smoothly with the output shaft of the record player motor 2, while also ensuring the accuracy of speed detection. The output shaft of the record player motor 2 is inserted into the docking slot 413 inside the connector 404 via the connector 412, directly transmitting torque to the grating gear 402. The insertion design supports quick disassembly and assembly, making it easy to separate the detection box 4 from the output shaft of the record player motor 2 during maintenance, further improving maintenance convenience.

[0036] Secondly, a record shaft 301 is fixedly connected to the center of the record placement tray 3. The record shaft 301 ensures the stability after the record is placed and detects the speed deviation in real time.

[0037] Finally, the fixing mechanism 5 includes two sets of connecting sleeves 501 fixedly connected to the bottom of the record player body 1 and located outside the detection box 4. Locking pins 502 are slidably connected inside each of the two sets of connecting sleeves 501. Springs 503 are sleeved on the outside of each of the two sets of locking pins 502. Top rings 504 are fixedly connected to the outside of each of the two sets of locking pins 502 and at opposite ends of the two sets of springs 503. Locking sleeves 505 are fixedly connected to the outside of the detection box 4 at positions corresponding to the two sets of connecting sleeves 501, with the locking pins 502 and locking sleeves 505 inserted into each other. A locking pin 506 is fixedly connected to the outside of the top ring 504. A slot 507 is provided on the outer side corresponding to the locking post 506. The locking post 502 is inserted into the locking sleeve 505 of the detection box 4 under the action of the spring 503 pressing against the top ring 504, forming a rigid connection to ensure the stable docking of the detection box 4 and the record player body 1. When disassembling the detection box 4, simply pull the locking post 502 and rotate it to make the locking post 506 engage in the locking position of the slot 507 and fix it, thereby allowing the locking post 502 to disengage from the locking sleeve 505 and release the fixation. This facilitates quick separation of the detection box 4 from the output shaft of the record player motor 2, thereby improving the convenience of maintenance.

[0038] In this embodiment, the specific implementation scenario is as follows: The record player motor 2 drives the record placement tray 3 at the top of the output shaft to rotate. Simultaneously, the bottom end of the output shaft is inserted into the docking slot 413 of the connector 404 inside the detection box 4 via the connector 412, causing the grating gear disk 402 to rotate synchronously. The detection head 403 captures the rotation pulse signal of the grating gear disk 402 in real time. The signal is transmitted to the control circuit through the gold-plated plug interface of the bottom contact 409 and the power sleeve 410 to accurately calculate the record speed. The detection box 4 and the box cover 401 are inserted into the sealing groove 407 through the sealing edge, and the rubber sealing ring 408 isolates dust and moisture to ensure the long-term stability of the internal sensor. The upper and lower ends of the connector 404 are rotatably connected to the detection box 4 and the box cover 401 via bearings 411 to reduce frictional resistance and ensure that the grating gear disk 402 rotates smoothly following the motor shaft. When the detection box 4 needs to be disassembled for maintenance, pull the two sets of locking pins 502 outward and rotate the locking pins 502 so that the locking pins 506 are engaged in the locking position of the locking slots 507. At this time, the locking pins 502 disengage from the locking sleeves 505 of the detection box 4. Then move the detection box 4 to separate the connector 404 from the mating joint 412 of the motor output shaft. At the same time, the contact 409 exits the power connection sleeve 410, and the entire detection box 4 can be removed. Then unscrew the fixing screws 406 to separate the box cover 401 from the detection box 4. The grating gear plate 402 or the detection head 403 can be directly disassembled and replaced for maintenance. The whole operation process is simple and convenient. Through the modular plug-in structure, sealing protection and fixing mechanism 5 design, this utility model realizes high-precision speed measurement and rapid maintenance, significantly improves equipment stability and maintenance efficiency, and thus reduces maintenance costs.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A record player record speed detection device, comprising a record player body (1), characterized in that: The record player body (1) is fixedly installed with a record player motor (2) inside. The top of the output shaft of the record player motor (2) is fixedly installed with a record placement tray (3). The bottom of the record player body (1) and the bottom end of the output shaft of the record player motor (2) are fixedly installed with a detection box (4). The outer side of the detection box (4) is fixedly connected to the record player body (1) through two sets of fixing mechanisms (5). The bottom of the detection box (4) is fixedly installed with a box cover (401). The inside of the detection box (4) is rotatably connected to a grating tooth disk (402). The inside of the detection box (4) and the outside of the grating tooth disk (402) is fixedly installed with a detection head (403). Both the upper and lower ends of the grating tooth disk (402) are fixedly connected with connectors (404), and the bottom end of the output shaft of the record player motor (2) is inserted into the connector (404).

2. The record player record speed detection device according to claim 1, characterized in that: The outer side of the cover (401) is fixedly connected with two sets of fixing ends (405), and both sets of fixing ends (405) are fixedly connected to the detection box (4) by fixing screws (406).

3. The record player record speed detection device according to claim 1, characterized in that: The bottom of the test box (4) is provided with a sealing groove (407), and the top of the box cover (401) is inserted into the sealing groove (407) through a sealing edge. A rubber sealing ring (408) is embedded inside the sealing groove (407).

4. The record player record speed detection device according to claim 1, characterized in that: The bottom end of the detection head (403) is fixedly connected to two sets of contacts (409). The bottom of the record player body (1) is fixedly connected to the corresponding positions of the two sets of contacts (409), and the contacts (409) are plugged into the contacts (410).

5. The record player record speed detection device according to claim 1, characterized in that: The upper and lower ends of the connector (404) are rotatably connected to the detection box (4) and the box cover (401) respectively through bearings (411). The bottom end of the output shaft of the record player motor (2) is fixedly connected to a connector (412). The connector (412) is inserted into the inside of the connector (404) through a docking slot (413).

6. The record player record speed detection device according to claim 1, characterized in that: A record shaft (301) is fixedly connected to the center of the record placement tray (3).

7. The record player record speed detection device according to claim 1, characterized in that: The fixing mechanism (5) includes two sets of connecting sleeves (501) fixedly connected to the bottom of the record player body (1) and located outside the detection box (4). The interior of each of the two sets of connecting sleeves (501) is slidably connected with a locking post (502). The exterior of each of the two sets of locking posts (502) is fitted with a spring (503). The exterior of each of the two sets of locking posts (502) and located at the opposite end of each of the two sets of springs (503) is fixedly connected with a top ring (504).

8. The record player record speed detection device according to claim 7, characterized in that: Locking sleeves (505) are fixedly connected to the outer side of the detection box (4) at positions corresponding to the two sets of connecting sleeves (501), and the locking pin (502) is inserted into the locking sleeve (505).

9. A record player record speed detection device according to claim 7, characterized in that: The top ring (504) is fixedly connected to a locking post (506), and a locking groove (507) is provided on the outer side of the connecting sleeve (501) at a position corresponding to the locking post (506).

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