CN210106558U - Multistage high accuracy frequency modulation knob - Google Patents

Abstract

A multi-level high-precision frequency modulation knob, which relates to the technical field of frequency modulation switches, mainly in order to solve the problem of poor adjustment accuracy of the existing frequency modulation knob, the utility model comprises a knob main body and a gearbox, and the knob main body is installed on the input of the gearbox. On the end, the output end of the gearbox is installed on the frequency modulation device. The utility model is mainly used for the frequency modulation knob to realize two forms of fast frequency modulation and fine frequency modulation, which can make the frequency modulation more accurate through the frequency modulation knob, so as to achieve more accurate frequency modulation. The effect of a good choice of frequency.

Description

A multi-level high-precision FM knob

technical field

The utility model relates to the technical field of frequency modulation switches, in particular to a multi-level high-precision frequency modulation knob.

Background technique

The FM switch is an important part of the FM device. It determines the degree of frequency signal reception and directly affects the quality of the frequency conversion information. The general FM switch is a knob type. The operator rotates the knob to determine the final received signal. The type of signal, such as the most common semiconductor radio, is selected by the user through the knob. When using it, the signal is often received, but the transmitted information or audio is not clear. This is because the precision of FM is not high enough. Influence, in order to solve this problem, many technicians will add filtering and auxiliary frequency modulation devices to the equipment. These are very good frequency modulation improvements from the device itself. This improvement is only signal enhancement on some common problems. , In some areas, the signal itself is weak due to the influence of the environment, and a more sensitive FM switch is required for step-by-step adjustment. Therefore, the design of a multi-level high-precision FM knob is very suitable for social needs.

Utility model content

In order to solve the problem of poor adjustment precision of the existing frequency modulation knob, the utility model further provides a multi-level high-precision frequency modulation knob;

A multi-level high-precision frequency modulation knob, which includes a knob main body and a gearbox, the knob main body is installed on the input end of the gearbox, and the output end of the gearbox is installed on the frequency modulation device;

The gearbox includes a No. 1 gear set, a No. 1 shaft, a No. 2 shaft, an input shaft, an input gear, a No. 2 gear set, an output gear, an output shaft, an input shaft support sleeve, a limit sleeve, a No. 1 bearing seat group, No. 2 bearing block and output shaft support sleeve;

The input shaft includes a first shaft section, a second shaft section and a third shaft section, the first shaft section, the second shaft section and the third shaft section are integrally formed in sequence, and the shaft diameter of the second shaft section is smaller than the shaft of the first shaft section diameter and the shaft diameter of the third shaft segment;

The No. 1 gear set includes a No. 1 driving gear and a No. 1 driven gear;

The No. 2 gear set includes the No. 2 driving gear and the No. 2 driven gear;

The No. 1 gear set is fitted on the No. 1 shaft, the No. 1 shaft is installed on the inner side wall of the gearbox casing through the No. 1 bearing seat set, the No. 2 gear set is fitted on the No. 2 shaft, and the No. 2 shaft is installed through the No. 2 bearing seat The group is installed on the inner side wall of the gearbox housing, the input shaft support sleeve is fixed on one end wall in the gearbox housing, the input shaft is rotatably connected to the inside of the input shaft support sleeve, and one end of the first shaft section passes through the transmission The box casing is arranged on the outside of the gearbox casing and is equipped with a knob body, the other end of the first shaft segment is arranged in the input shaft support sleeve, and a limit sleeve is arranged between the second shaft segment and the input shaft support sleeve, and the input shaft The inner wall of the shaft support sleeve is provided with an annular groove, the limit sleeve is clamped in the annular groove, one end of the third shaft section is arranged inside the input shaft support sleeve, and the other end of the third shaft section is fixedly connected with a The input gear and the output shaft support sleeve are fixedly connected to the other end wall in the gearbox housing, the output shaft is rotatably connected to the inside of the input shaft support sleeve, one end of the output shaft is arranged inside the gearbox housing, and the output shaft is An output gear is fixed on one end, and the other end of the output shaft passes through the gearbox casing and is arranged on the outside of the gearbox casing and is connected with the frequency modulation device. The output gear and No. 1 driven gear and No. 2 driven gear are both. tooth meshing setting;

Preferably, it also includes a protective stretching sleeve, the protective stretching sleeve is sleeved on the first shaft segment, and the protective stretching sleeve is arranged between the knob main body and the gearbox, and one end of the protective stretching sleeve is fixed on the knob main body to protect the The other end of the stretch sleeve is fixed on the gearbox;

Preferably, the transmission ratio of the No. 1 driving gear to the input gear is i, and the value range of i is 4-5;

Preferably, the transmission ratio of the input gear to the No. 2 driving gear is u, and the value range of u is 2-3;

Preferably, the transmission ratio between the output gear and the No. 1 driven gear is 1, and the value range of I is 2-3;

Preferably, the transmission ratio of the No. 2 driven gear to the output gear is U, and the value range of U is 4-5;

Preferably, the value of the length L1 of the second shaft segment is the same as the value of the horizontal distance L2 between the No. 1 driving gear and the No. 2 driving gear;

Preferably, the number of teeth and the module of the input gear and the output gear are the same.

The utility model and the prior art have the following beneficial effects:

Compared with the frequency modulation knob provided in the prior art, the utility model adds a gearbox, which can realize fine frequency modulation by changing the meshing relationship of the internal gears of the gearbox and changing the transmission ratio during rotation. The frequency modulation knob provided in the prior art is working It is only easy to adjust to the acceptable frequency range. If this frequency range is too long, the received audio frequency or signal will be unclear. Rotating the knob again is likely to jump out of the selected frequency range and cannot achieve the effect of adjustment. The utility model You can quickly adjust to the selected frequency range through a large transmission ratio gear set, and then use a small transmission ratio gear set for fine adjustment, and select the best part in the frequency range for signal or audio transmission, so as to achieve better performance. receive the effect.

Description of drawings

Fig. 1 is the internal structure diagram of the utility model;

Fig. 2 is a partial enlarged view in the utility model;

FIG. 3 is a front view of the utility model.

Detailed ways

Embodiment 1: This embodiment will be described with reference to FIG. 1 to FIG. 3. A multi-stage frequency modulation knob described in this embodiment includes a knob body 1, and is characterized in that: it also includes a gearbox 3, and the knob body 1 Installed on the input end of the gearbox 3, and the output end of the gearbox 3 is installed on the frequency modulation device;

The gearbox 3 includes a No. 1 gear set, No. 1 shaft 5, No. 2 shaft 6, an input shaft 7, an input gear 8, a No. 2 gear set, an output gear 10, an output shaft 11, an input shaft support sleeve 12, a limit Sleeve 13, No. 1 bearing seat group 14, No. 2 bearing seat group 15 and output shaft support sleeve 16;

The input shaft 7 includes a first shaft section 7-1, a second shaft section 7-2 and a third shaft section 7-3, a first shaft section 7-1, a second shaft section 7-2 and a third shaft section 7- 3 are integrally formed in sequence, and the shaft diameter of the second shaft section 7-2 is smaller than the shaft diameter of the first shaft section 7-1 and the shaft diameter of the third shaft section 7-3;

The No. 1 gear set includes the No. 1 driving gear 4-1 and the No. 1 driven gear 4-2;

The No. 2 gear set includes the No. 2 driving gear 9-1 and the No. 2 driven gear 9-2;

The No. 1 gear set is fitted on the No. 1 shaft 5, the No. 1 shaft 5 is installed on the inner side wall of the gearbox 3 through the No. 1 bearing seat set 14, the No. 2 gear set is fitted on the No. 2 shaft 6, and the No. 2 shaft 6. It is installed on the inner side wall of the casing of the gearbox 3 through the No. 2 bearing seat group 15, the input shaft support sleeve 12 is fixedly connected to an end wall in the casing of the gearbox 3, and the input shaft 7 is rotatably connected to the input shaft support sleeve 12. Inside, one end of the first shaft segment 7-1 passes through the casing of the gearbox 3 and is arranged on the outside of the casing of the gearbox 3 and is installed with the knob body 1, and the other end of the first shaft segment 7-1 is arranged on the input shaft In the support sleeve 12, a limit sleeve 13 is arranged between the second shaft section 7-2 and the input shaft support sleeve 12, an annular groove is formed on the inner wall of the input shaft support sleeve 12, and the limit sleeve 13 is clamped in the annular groove. In the groove, one end of the third shaft segment 7-3 is arranged inside the input shaft support sleeve 12, the other end of the third shaft segment 7-3 is fixedly connected with the input gear 8, and the output shaft support sleeve 16 is fixedly connected to the gearbox. 3 On the other end wall in the casing, the output shaft 11 is rotatably connected to the inside of the input shaft support sleeve 12, one end of the output shaft 11 is arranged inside the casing of the gearbox 3, and one end of the output shaft 11 is fixedly connected with the output shaft. Gear 10, the other end of the output shaft 11 passes through the casing of the gearbox 3 and is arranged on the outside of the casing of the gearbox 3 and is connected with the frequency modulation device. The output gear 10 is connected to the No. 1 driven gear 4-2 and the No. 2 driven gear. 9-2 are all gear meshing settings, and other components and connection methods are the same as in the first embodiment.

The frequency modulation knob provided in the prior art of the present invention adds a gearbox, which can realize fine frequency modulation by changing the meshing relationship of the inner gears of the gearbox and changing the transmission ratio during rotation. The frequency modulation knob provided in the prior art is in operation. , but it is easy to adjust to the acceptable frequency range. If this frequency range is too long, the received audio frequency or signal will be unclear. Rotating the knob again is likely to jump out of the selected frequency range, which cannot achieve the effect of adjustment. The utility model can First, quickly adjust to the selected frequency range through the large transmission ratio gear set, and then finely adjust the small transmission ratio gear set in the replacement, and select the best part in the frequency range for signal or audio transmission, so as to achieve better reception. Effect, the multi-level in the name of the utility model is only two levels in this embodiment, the user can increase the gear set in the gearbox 3 according to the actual needs, so as to achieve the effect of three-level, four-level or even more level adjustment, The high precision that appears in the name of the utility model is related to the transmission ratio of the gears in the gearbox 3. According to different use requirements, the transmission ratio of the gears in the gearbox 3 can be adjusted to achieve the determination of accuracy. Bearings are provided in both the No. 1 bearing block set 14 and the No. 2 bearing block set 15 .

Specific embodiment 2: This embodiment is described with reference to FIG. 1 and FIG. 3. In this embodiment, the device further includes a protective stretching sleeve 2, which is sleeved on the first shaft section 7-1 and protects the stretching sleeve 2. The extension sleeve 2 is arranged between the knob main body 1 and the gearbox 3 , one end of the protective extension sleeve 2 is fixed on the knob main body 1 , and the other end of the protective extension sleeve 2 is fixed on the gearbox 3 . Other components and connection methods are the same as in the first embodiment.

In this way, since the knob main body 1 often pulls the input shaft 7, a part of the first shaft segment 7-1 is always exposed to the air, and the protective stretching sleeve 2 provides protection for this part to prevent exposure to The first shaft section 7-1 in the air is corroded and broken.

Embodiment 3: This embodiment will be described with reference to FIG. 3. In this embodiment, the transmission ratio of the No. 1 driving gear 4-1 and the input gear 8 is i, and the value range of i is 4-5. Other components and connection methods are the same as The specific embodiment one is the same.

In this way, the No. 1 driving gear 4-1 meshes with the input gear 8 during work, so that the rotary knob body 1 can achieve precise adjustment. The No. 1 driving gear 4-1 is a large gear in the No. 1 gear set. The diameter of the gear is relatively large, but since the size of the knob device itself is not easy to be too large, the gearbox 3 must also have certain size requirements. It affects the overall appearance of the device. At the same time, the No. 1 driving gear 4-1 is also used in conjunction with the No. 1 driven gear 4-2. The transmission ratio between the No. 1 driving gear 4-1 and the input gear 8 is obvious between 4-5. To achieve the effect of precise adjustment, there is no need to use a larger transmission ratio to increase space and cost.

Specific embodiment 4: This embodiment is described with reference to FIG. 1. In this embodiment, the transmission ratio of the input gear 8 and the second driving gear 9-1 is u, and the value range of u is 2-3. Other components and connection methods are the same as The specific embodiment one is the same.

In this way, the No. 2 driving gear 9-1 is the pinion gear in the No. 2 gear group, the input gear 8 meshes with the No. 2 driving gear 9-1 so that the rotating knob body 1 can realize the function of block speed adjustment, and the input gear 8 and the No. 2 driving gear 9-1 are engaged. The transmission ratio of the No. 2 driving gear 9-1 directly affects the size of the No. 2 driving gear 9-1. Considering that it is more in line with the space of the gearbox 3 and the service life of the gear itself, the difference between the input gear 8 and the No. 2 driving gear 9-1 is The most suitable gear ratio is between 2-3.

Embodiment 5: This embodiment will be described with reference to FIG. 1. In this embodiment, the transmission ratio between the output gear 10 and the No. 1 driven gear 4-2 is 1, and the value range of I is 2-3. Other components and connection methods It is the same as the fifth embodiment.

In this way, in order to make the No. 1 driven gear 4-2 cooperate with the No. 1 driving gear 4-1, the initially set transmission ratio will not be reduced, and a good guarantee for fine adjustment is provided.

Embodiment 6: This embodiment will be described with reference to FIG. 1. In this embodiment, the transmission ratio of the No. 2 driven gear 9-2 and the output gear 10 is U, and the value range of U is 4-5. Other components and connection methods It is the same as the sixth embodiment.

In this way, in order to use the No. 2 driven gear 9-2 with the No. 2 driving gear 9-1, the initially set transmission ratio will not be reduced, and a good guarantee for rapid adjustment is provided.

Embodiment 7: This embodiment will be described with reference to FIG. 1. In this embodiment, the value of the length L1 of the second shaft segment 7-2 and the horizontal distance between the No. 1 driving gear 4-1 and the No. 2 driving gear 9-1 The value of L2 is the same, and other components and connection methods are the same as those in the sixth embodiment.

In this way, the limiting sleeve 13 can better achieve the limiting effect. When the shoulders of the second shaft segment 7-2 and the first shaft segment 7-1 are in contact with the limiting sleeve 13, the input gear 8 and the second shaft are in contact with each other. When the No. 1 driving gear 9-1 is engaged, when the shoulders of the second shaft segment 7-2 and the third shaft segment 7-3 are in contact with the limit sleeve 13, the input gear 8 is meshed with the No. 1 driving gear 4-1. At this time, the operator can judge whether the input gear 8 meshes with the driving gears in the two gear sets through the motion state of the input shaft 7 .

Embodiment 8 This embodiment will be described with reference to FIG. 1 . In this embodiment, the number of teeth and modules of the input gear 8 and the output gear 10 are the same, and other components and connection methods are the same as those in the sixth embodiment.

In this way, since the output gear 10 is in constant meshing state with the No. 1 driven gear 4-2 and the No. 2 driven gear 9-2, when the output gear 10 rotates, it will definitely bring the No. 1 driven gear 4-2 with it. It rotates at the same time with the No. 2 driven gear 9-2, and the input gear 8 and the output gear 10 have the same number of teeth and diameters, which will facilitate the input gear 8 to change the adjustment state. The No. 1 driving gear 9-1 is engaged. For example, during the quick adjustment, the No. 1 driving gear 4-1 will be affected by the No. 1 driven gear 4-2 to idle. After the quick adjustment, the No. 1 driving gear 4-1 will rotate. The tooth profile of the position is just meshed with the tooth profile of the position after the input gear 8 moves to the outside of the gearbox 3, so it is only necessary to pull the input gear 8 outward to the limit position.

working principle

There are two adjustment gear sets in the gearbox 3. The driven gear in the two gear sets is in a state of constant meshing with the output gear 10. According to the required adjustment state, the input gear 8 and the driving gear in the two gear sets are in a state of constant meshing. The gears are selectively meshed. When fast frequency modulation is to be performed, the signal reception clarity for the frequency is not very high. Push the knob body 1 to compress the protective stretch sleeve 2, and the input shaft 7 slides into the gearbox 3. Wait until the second shaft When the shoulder of segment 7-2 and the first shaft segment 7-1 is in contact with the limit sleeve 13, and the input shaft 7 will not move inward any more, it proves that the input gear 8 on the input shaft 7 and the No. 2 driving gear 9-1 It has been engaged. At this time, the rotating knob main body 1 meshes with the No. 2 driving gear 9-1 through the input gear 8 to drive the No. 2 shaft 6 to rotate, so that the No. 2 driven gear 9-2 on the No. 2 shaft 6 will drive the output gear 10. Rotation, through the transmission ratio of the two sets of meshing gears, the effect that the input gear 8 rotates once and the output gear 10 rotates multiple times can be achieved, realizing the function of rapid adjustment;

When performing fine adjustment, the knob body 1 is pulled back to stretch the protective stretching sleeve 2, and the input shaft 7 slides out of the gearbox 3 until the shoulders of the second shaft section 7-2 and the third shaft section 7-3. When the input shaft 7 is in contact with the limit sleeve 13 and the input shaft 7 will no longer move outward, it proves that the input gear 8 on the input shaft 7 and the No. 1 driving gear 4-1 have been engaged. The No. 1 driving gear 4-1 meshes to drive the No. 1 shaft 5 to rotate, so that the No. 1 driven gear 4-2 on the No. 1 shaft 5 will drive the output gear 10 to rotate. Through the transmission ratio of the two sets of meshing gears, the input gear can be reached. 8 rotates for many times, the effect of output gear 10 rotates once, realizes the function of fine adjustment.

Claims (8)

1. The utility model provides a multistage high accuracy frequency modulation knob, it includes knob main part (1), its characterized in that: the knob is characterized by further comprising a gearbox (3), wherein the knob body (1) is installed at the input end of the gearbox (3), and the output end of the gearbox (3) is installed on the frequency modulation device;

the gearbox (3) comprises a first gear set, a first shaft (5), a second shaft (6), an input shaft (7), an input gear (8), a second gear set, an output gear (10), an output shaft (11), an input shaft support sleeve (12), a limiting sleeve (13), a first bearing seat set (14), a second bearing seat set (15) and an output shaft support sleeve (16);

the input shaft (7) comprises a first shaft section (7-1), a second shaft section (7-2) and a third shaft section (7-3), the first shaft section (7-1), the second shaft section (7-2) and the third shaft section (7-3) are sequentially and integrally formed, and the shaft diameter of the second shaft section (7-2) is smaller than that of the first shaft section (7-1) and that of the third shaft section (7-3);

the first gear set comprises a first driving gear (4-1) and a first driven gear (4-2);

the second gear set comprises a second driving gear (9-1) and a second driven gear (9-2);

the first gear set is sleeved on the first shaft (5), the first shaft (5) is installed on the inner side wall of a shell of the gearbox (3) through the first bearing seat group (14), the second gear set is sleeved on the second shaft (6), the second shaft (6) is installed on the inner side wall of the shell of the gearbox (3) through the second bearing seat group (15), an input shaft support sleeve (12) is fixedly connected on one end wall in the shell of the gearbox (3), the input shaft (7) is rotatably connected inside the input shaft support sleeve (12), one end of a first shaft section (7-1) penetrates through the shell of the gearbox (3) and is arranged on the outer side of the shell of the gearbox (3) and is provided with a knob main body (1), the other end of the first shaft section (7-1) is arranged in the input shaft support sleeve (12), a limit sleeve (13) is arranged between the second shaft section (7-2) and the input shaft support sleeve (12), an annular groove is arranged on the inner wall of the input shaft supporting sleeve (12), a limiting sleeve (13) is clamped in the annular groove, one end of a third shaft section (7-3) is arranged inside the input shaft supporting sleeve (12), the other end of the third shaft section (7-3) is fixedly connected with an input gear (8), an output shaft supporting sleeve (16) is fixedly connected on the other end wall in the shell of the gearbox (3), an output shaft (11) is rotatably connected inside the input shaft supporting sleeve (12), one end of the output shaft (11) is arranged inside the shell of the gearbox (3), and one end of the output shaft (11) is fixedly connected with an output gear (10), the other end of the output shaft (11) penetrates through the shell of the gearbox (3) and is arranged on the outer side of the shell of the gearbox (3) and connected with the frequency modulation device, and the output gear (10), the first driven gear (4-2) and the second driven gear (9-2) are in tooth meshing arrangement.

2. A multistage high accuracy fm knob as claimed in claim 1, wherein: the novel gear transmission mechanism is characterized by further comprising a protective stretching sleeve (2), wherein the protective stretching sleeve (2) is sleeved on the first shaft section (7-1), the protective stretching sleeve (2) is arranged between the knob main body (1) and the gear box (3), one end of the protective stretching sleeve (2) is fixed on the knob main body (1), and the other end of the protective stretching sleeve (2) is fixed on the gear box (3).

3. A multistage high accuracy fm knob as claimed in claim 1, wherein: the transmission ratio of the first driving gear (4-1) to the input gear (8) is i, and the value range of i is 4-5.

4. A multistage high precision fm knob as claimed in claim 1 or 3, wherein: the transmission ratio of the input gear (8) to the second driving gear (9-1) is u, and the value range of u is 2-3.

5. A multistage high precision FM knob as claimed in claim 4, wherein: the transmission ratio of the output gear (10) to the first driven gear (4-2) is I, and the value range of I is 2-3.

6. A multistage high precision FM knob as claimed in claim 5, wherein: the transmission ratio of the second driven gear (9-2) to the output gear (10) is U, and the value range of U is 4-5.

7. A multistage high accuracy fm knob as claimed in claim 6, wherein: the length L1 of the second shaft section (7-2) has the same value as the horizontal distance L2 between the first driving gear (4-1) and the second driving gear (9-1).

8. A multistage high accuracy fm knob as claimed in claim 7, wherein: the number of teeth and the modulus of the input gear (8) and the output gear (10) are the same.

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