Precision frequency adjustment switch for digital walkie-talkie

Abstract

The present invention relates to the technical field of electrical components, and in particular to a precision frequency adjustment switch of a digital walkie-talkie, comprising a hexagonal clamping part installed on a walkie-talkie body, wherein a circular limiting part is fixedly installed on the top and bottom of the hexagonal clamping part, and a hexagonal rotating column is rotatably connected to the circular limiting part. At an emergency rescue site, rescuers use a fixed-frequency walkie-talkie for communication and coordination. If the frequency modulation switch knob is accidentally touched to change the frequency, communication interruption may occur, affecting rescue efficiency and even endangering life safety. The fixed knob can ensure that the device always operates at the set frequency and ensure the stability of the communication link. Accidentally touching the frequency modulation switch knob to change the frequency may cause the device to enter other frequency bands in use, thereby causing signal interference. On the one hand, it interferes with the normal communication of other devices, and on the other hand, it may also receive unnecessary signals, affecting the quality of normal communication.

Description

Technical Field

[0001] The invention relates to the technical field of electrical components, in particular to a precision frequency adjustment switch for a digital intercom. Background Art

[0002] The precision frequency adjustment switch of a digital walkie-talkie is a component on the walkie-talkie used to accurately set and adjust the operating frequency. By changing the capacitance, inductance and other parameters in the circuit, the oscillation frequency of the walkie-talkie is changed so that it can work at the required frequency. When the adjustment switch is turned or pressed, the parameter value of the internal circuit will change, thereby achieving fine or coarse adjustment of the frequency. The frequency adjustment switch of some digital walkie-talkies may adopt a variable capacitor or inductor design. When the switch is operated, the value of the capacitor or inductor will change, causing the oscillation frequency to change, so as to achieve the purpose of precise frequency adjustment.

[0003] In communication equipment, accidentally touching the precision frequency adjustment switch may cause the operating frequency of the equipment to change. If the two communicating parties use a specific frequency for communication, once the frequency adjustment switch of one party accidentally changes the frequency, the communication frequencies of the two parties will not match, resulting in communication interruption. In emergency rescue scenarios, rescue teams rely on specific frequencies for command and coordination. Accidentally touching the frequency adjustment switch may prevent rescue personnel from receiving or sending information in a timely manner, seriously affecting the rescue work. Summary of the invention

[0004] The object of the present invention is to provide a precise frequency adjustment switch for a digital intercom to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a precision frequency adjustment switch of a digital walkie-talkie, comprising a hexagonal clamping part installed on a walkie-talkie body, the top and bottom of the hexagonal clamping part are fixedly installed with circular limiting parts, a hexagonal rotating column is rotatably connected to the circular limiting part, an adjustable mounting cap is provided on the outer sleeve of the hexagonal rotating column, a circular locking seat is movably installed in a circular mounting groove arranged on the adjustable mounting cap, a threaded mounting column is fixedly installed on the bottom of the circular locking seat, the threaded mounting column is threadedly installed in the hexagonal rotating column, a lifting adjustment ring is provided on the outer sleeve of the hexagonal rotating column, a vertical assembly groove is provided on the bottom of the lifting adjustment ring, and the A vertical elastic plate is fixedly installed in the vertical assembly groove, an elliptical protrusion is fixedly installed at the bottom end of the vertical elastic plate, the structure composed of the vertical elastic plate and the elliptical protrusion is movably inserted in the fixed card holder, the fixed card holder is installed at a position on the upper surface of the intercom body corresponding to the vertical assembly groove, a fixed locking seat is provided on the outer movable sleeve of the hexagonal rotating column, locking convex strips are fixedly installed at equal intervals on the circumferential outer wall of the fixed locking seat, a plurality of deformable pressure strips are distributed in a circular array on the top of the fixed locking seat with the central axis of the fixed locking seat as the array center, an elastic pressure plate is fixedly installed on the lower surface of the outer end of the deformable pressure strip, and an annular pressure ring is fixedly installed on the bottom of the inner wall of the lifting and lowering adjustment ring.

[0006] Preferably, the inner wall of the fixed holder is provided with a groove adapted to the structure composed of the vertical elastic plate and the elliptical protrusion.

[0007] Preferably, an auxiliary pushing ring is coaxially fixedly mounted on the outer wall of the lifting and adjusting ring.

[0008] Preferably, the annular pressure ring is arranged at a corresponding position directly above the elastic pressure plate.

[0009] Preferably, a switch body is fixedly installed on the bottom of the circular limiting part located at the bottom, a component mounting seat is fixedly installed on the bottom of the switch body, a separating contact is fixedly installed on the bottom of the component mounting seat, a vertical assembly strip is also fixedly installed on the bottom of the component mounting seat, and the vertical assembly strips are located on both sides of the separating contact, protective cover plates are movably mounted on both sides of the vertical assembly strips, and the two protective cover plates are fixedly connected by bolts, a limiting support strip is fixedly installed on the inner wall of the protective cover plate, a wire pressing plate is movably mounted above the limiting support strip, a wire core located outside the separating contact is arranged between the two wire pressing plates, and a wire skin is fixedly sleeved outside the wire core.

[0010] Preferably, a wire threading groove is provided on the wire pressing plate, and the separated portion at the top end of the wire core is located in the wire threading groove.

[0011] Preferably, a signal transmission line is arranged between the component mounting seats for connection, and insertion plates are arranged at both ends of the signal transmission line. A circular convex strip is arranged at the outer end of the insertion plate, and the circular convex strip and the insertion plate are movably engaged in the positioning slot provided on the component mounting seat.

[0012] Preferably, a pressure-bearing protrusion is fixed on the outer wall of the insert plate, and the structure composed of the insert plate and the circular protrusion is adapted to the shape of the positioning slot.

[0013] Preferably, a circular protective sleeve is arranged outside the switch body, a support bar is fixedly mounted on the bottom end of the circular protective sleeve, and the support bar is fixedly mounted on the outer wall of the switch body.

[0014] Preferably, an isolation cover is fixedly mounted on the outer wall of the switch body, and an annular fixing strip is fixedly sleeved on the outer wall of the isolation cover near the bottom and at the bottom.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Use your hand to apply pressure to the auxiliary push ring and the lifting adjustment ring. The auxiliary push ring and the lifting adjustment ring form a structure that drives the annular pressure ring to descend. The annular pressure ring applies pressure to the deformable pressure strip and the elastic pressure plate. The deformable pressure strip is deformed, and the elastic pressure plate contacts the locking convex strip. The elastic pressure plate deforms and the friction between the locking convex strip increases, thereby limiting the deformable pressure strip and the hexagonal rotating column structure to prevent the deformable pressure strip and the hexagonal rotating column structure from moving, thereby preventing the adjustable mounting cap from rotating due to accidental touching. In communication equipment (such as walkie-talkies), once the frequency modulation switch knob is accidentally touched, the operating frequency of the equipment may change. For some devices that rely on a specific frequency, Frequency stability is crucial in scenarios where communication is required, such as emergency rescue communications and commercial radio broadcasts. For example, at the emergency rescue site, rescuers use fixed-frequency walkie-talkies to communicate and coordinate. If the FM switch knob is accidentally touched to change the frequency, communication may be interrupted, affecting rescue efficiency and even endangering life safety. The fixed knob can ensure that the device always works at the set frequency to ensure the stability of the communication link. Accidentally touching the FM switch knob to change the frequency may cause the device to enter other frequency bands in use, thereby causing signal interference. On the one hand, it interferes with the normal communication of other devices, and on the other hand, it may also receive unwanted signals, affecting the quality of normal communication.

[0017] 2. When performing frequency modulation operation, the adjustable mounting cap on the side with a smaller frequency can be adjusted. After the adjustable mounting cap at this position is rotated, a corresponding signal is generated. The signal at this position is then transmitted to the device on the side with a larger frequency through the signal transmission line to ensure the signal transmission effect. The accuracy of the frequency adjustment is improved through the cooperation of two frequency adjustment devices, and the signal transmission line can be removed from between the two component mounting seats. A single set of frequency modulation switches may have a certain error range when adjusting the frequency. For example, due to the gap in the mechanical structure or the discreteness of the electronic components, the actual frequency after adjustment may deviate from the target frequency. When two sets of frequency modulation switches are used in conjunction, one set of switches can be used for coarse adjustment to quickly adjust the frequency to near the target frequency, and the other set of switches can be used for fine adjustment to more accurately adjust the frequency to the accurate value, thereby effectively reducing the frequency deviation and improving the clarity and stability of communication.

[0018] 3. An isolation cover is provided outside the switch body to isolate the electromagnetic signal of the switch body and prevent the electrical components in the switch body from being affected by the electromagnetic signal. The annular fixing strip limits and fixes the isolation cover from the top and bottom of the isolation cover to ensure the fixing effect of the isolation cover. At the same time, the circular protective cover is located outside the isolation cover to protect the isolation cover and prevent the isolation cover from being damaged by external force, thereby increasing the service life of the isolation cover. When the frequency modulation switch is working, the external electromagnetic signal may interfere with the normal operation of its internal circuit. If there is no isolation cover, the external electromagnetic interference may cause the capacitor, inductor and other components inside the frequency modulation switch to be affected, thereby causing the frequency to shift. The electromagnetic signal emitted by the interference source may be coupled into the frequency modulation switch circuit. The use of an isolation cover can effectively block these external electromagnetic signals, ensuring that the frequency modulation switch can accurately maintain the set frequency and improve the accuracy of frequency modulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the corresponding position of the intercom body of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the corresponding position of the circular limiting part of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure at the corresponding position of the hexagonal engaging part of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the corresponding position of the lifting adjustment ring of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure at the corresponding position of the support bar of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure at the corresponding position of the hexagonal rotating column of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the corresponding position of the fixed card holder of the present invention.

[0026] Figure 8 It is a schematic diagram of the structure at the corresponding position of the elliptical protrusion of the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure at the corresponding position of the auxiliary push ring of the present invention.

[0028] Fig.10 It is a schematic diagram of the structure at the corresponding position of the signal transmission line of the present invention.

[0029] Fig.11 It is a structural schematic diagram of the corresponding position of the positioning slot of the present invention.

[0030] Fig.12 It is a structural schematic diagram of the corresponding position of the switch body of the present invention.

[0031] Fig.13 It is a structural schematic diagram of the corresponding position of the wire pressing plate of the present invention.

[0032] Fig.14 It is a structural schematic diagram of the corresponding position of the wire threading groove of the present invention.

[0033] In the figure: 1. intercom body; 2. hexagonal snap-fit ​​part; 3. circular limit part; 4. hexagonal rotating column; 5. adjustable mounting cap; 501. circular mounting groove; 6. circular locking seat; 7. threaded mounting column; 8. lifting adjustment ring; 801. vertical assembly groove; 9. vertical elastic plate; 901. elliptical convex block; 10. fixed card seat; 11. fixed locking seat; 12. locking convex strip; 13. deformable pressure strip; 14. elastic pressure plate; 15. annular pressure ring; 16 , auxiliary push ring; 17, switch body; 18, component mounting seat; 1801, positioning slot; 19, separation contact; 20, vertical assembly strip; 21, protective cover; 22, limit support strip; 23, wire pressing plate; 2301, wire threading groove; 24, wire core; 25, wire skin; 26, signal transmission line; 27, insertion plate; 2701, circular convex strip; 28, pressure convex block; 29, circular protective cover; 30, support strip; 31, isolation cover; 32, annular fixing strip. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1As to the elastic pressure plate 14 in FIG., the present invention provides a technical solution: a precision frequency adjustment switch for a digital walkie-talkie, comprising a hexagonal clamping part 2 installed on a walkie-talkie body 1, the cross-sectional shape of the hexagonal clamping part 2 is a hexagon, and through the special shape design of the hexagonal clamping part 2, after the hexagonal clamping part 2 is clamped on the walkie-talkie body 1, the hexagonal clamping part 2 will not rotate, ensuring the stability of the hexagonal clamping part 2 after installation, the top and bottom of the hexagonal clamping part 2 are fixedly installed with a circular limiting part 3, the circular limiting part 3 is fixedly installed at the bottom and top of the hexagonal clamping part 2, the installation of the hexagonal clamping part 2 is limited by the circular limiting part 3, and the vertical movement of the hexagonal clamping part 2 is limited by the circular limiting part 3, ensuring the hexagonal The engaging part 2 will not rise or fall, and a hexagonal rotating column 4 is rotatably connected to the circular limiting part 3. The movement of the frequency adjustment structure in the hexagonal rotating column 4 is realized by the rotation of the hexagonal rotating column 4. At the same time, the cross-sectional shape of the hexagonal rotating column 4 is also hexagonal. The special shape design of the hexagonal rotating column 4 ensures that the adjustable mounting cap 5 will not slip after being engaged on the hexagonal rotating column 4, thereby improving the stability of the structure composed of the adjustable mounting cap 5 and the hexagonal rotating column 4. An adjustable mounting cap 5 is movably sleeved on the outer side of the hexagonal rotating column 4, and a circular locking seat 6 is movably installed in a circular mounting groove 501 arranged on the adjustable mounting cap 5. The circular locking seat 6 is composed of a disc structure corresponding to the shape of the circular mounting groove 501 and a mounting part corresponding to the wrench. By forming a circular lock The disc structure of the stop seat 6 rises and falls in the circular mounting groove 501 to play a limiting role. A threaded mounting column 7 is fixedly installed at the bottom of the circular locking seat 6. The threaded mounting column 7 is threadedly installed in the hexagonal rotating column 4. The circular locking seat 6 is driven to rotate by a wrench. The rotation of the circular locking seat 6 drives the threaded mounting column 7 to rotate. When the threaded mounting column 7 rotates, the inner thread of the hexagonal rotating column 4 moves to achieve the fixation of the hexagonal rotating column 4 and the adjustable mounting cap 5 after assembly. A lifting adjustment ring 8 is provided on the outer movable sleeve of the hexagonal rotating column 4. A groove corresponding to the shape of the hexagonal rotating column 4 is opened on the lifting adjustment ring 8. At the same time, a gap is left between the bottom of the lifting adjustment ring 8 and the top of the intercom body 1 to ensure the lifting of the lifting adjustment ring 8. A vertical assembly groove 801 is opened at the bottom of the lifting adjustment ring 8. A vertical elastic plate 9 is fixedly installed in the vertical assembly groove 801, and an elliptical protrusion 901 is fixedly installed at the bottom end of the vertical elastic plate 9. The vertical elastic plate 9 and the elliptical protrusion 901 are an integrally formed structure, and the structure composed of the vertical elastic plate 9 and the elliptical protrusion 901 can be deformed. At the same time, the structure composed of the vertical elastic plate 9 and the elliptical protrusion 901 can be made of iron or plastic. The iron material has higher strength, and the plastic production cost is lower. It can be flexibly selected according to the cost, and the production flexibility is stronger. The structure composed of the vertical elastic plate 9 and the elliptical protrusion 901 is movably plugged into the fixed card holder 10. The inner wall of the fixed card holder 10 is provided with a groove adapted to the structure composed of the vertical elastic plate 9 and the elliptical protrusion 901, and a groove corresponding to the elliptical protrusion 901 is provided in the fixed card holder 10.When the vertical elastic plate 9 and the elliptical protrusion 901 are inserted into the fixed card seat 10, the vertical elastic plate 9 is deformed until the elliptical protrusion 901 moves to the bottom of the fixed card seat 10, and the bottom of the vertical elastic plate 9 rebounds and the elliptical protrusion 901 is engaged at the corresponding position in the fixed card seat 10.

[0036] The fixed card seat 10 is installed at the position corresponding to the vertical assembly groove 801 on the upper surface of the intercom body 1. The fixed card seat 10 is used for positioning and fixing the lifting and lowering adjustment ring 8 after lifting and lowering, ensuring the lifting and lowering convenience of the lifting and lowering adjustment ring 8. The outer movable sleeve of the hexagonal rotating column 4 is provided with a fixed locking seat 11. The outer circumferential wall of the fixed locking seat 11 is fixedly installed with locking convex strips 12 at equal intervals. The top of the fixed locking seat 11 is provided with a plurality of deformable pressure strips 13 in a circular array with the central axis of the fixed locking seat 11 as the array center. The deformable pressure strips 13 are arranged on the outside. An elastic pressure plate 14 is fixedly installed on the lower surface of one end, and an annular pressure ring 15 is fixedly installed on the bottom of the inner wall of the lifting and adjusting ring 8. The lifting and lowering of the lifting and adjusting ring 8 drives the annular pressure ring 15 to be lifted and lowered. When the annular pressure ring 15 is lifted and lowered, pressure is applied to the structure composed of the deformable pressure strip 13 and the elastic pressure plate 14. The elastic pressure plate 14 is made of soft material. The elastic pressure plate 14 is made of natural rubber, has good elasticity, wear resistance and fatigue resistance, and is suitable for some occasions with high requirements on elasticity and relatively mild working environment, such as the pressure structure in this equipment.

[0037] An auxiliary pushing ring 16 is coaxially fixedly installed on the outer wall of the lifting adjustment ring 8. The auxiliary pushing ring 16 assists the lifting of the lifting adjustment ring 8. The auxiliary pushing ring 16 pushes the lifting of the lifting adjustment ring 8, making the operation more convenient.

[0038] The annular pressure ring 15 is arranged at a corresponding position directly above the elastic pressure plate 14. The positions of the annular pressure ring 15 and the deformable pressure strip 13 correspond to each other. The annular pressure ring 15 applies pressure to the deformable pressure strip 13 and the elastic pressure plate 14 to ensure the contact between the elastic pressure plate 14 and the locking ridge 12. After the locking ridge 12 and the elastic pressure plate 14 come into contact, the elastic pressure plate 14 is deformed to block the rotation of the hexagonal rotating column 4.

[0039] A switch body 17 is fixedly mounted at the bottom of the circular limiting part 3 located below. There are components such as variable capacitors or inductors in the switch body 17. When the adjustable mounting cap 5 is rotated, the capacitance or inductance value of the internal circuit will be changed, thereby achieving frequency adjustment. For example, in the FM switch of some radios, the rotation angle of the knob is proportional to the change in frequency. The user can accurately adjust to the desired radio frequency by slowly turning the knob. The principle of a digital walkie-talkie is similar. A component mounting seat 18 is fixedly mounted at the bottom of the switch body 17. A separation contact 19 is fixedly mounted at the bottom of the component mounting seat 18. The separation contact 19 is a structure for providing signals. A vertical mounting strip 20 is also fixedly mounted at the bottom of the component mounting seat 18, and the vertical mounting strip 20 is located on both sides of the separation contact 19. The strip 20 is used to limit the protective cover 21. The protective cover 21 is movably mounted on both sides of the vertical assembly strip 20, and the two protective cover plates 21 are fixedly connected by bolts. A limiting support strip 22 is fixedly mounted on the inner wall of the protective cover 21, and a wire pressing plate 23 is movably mounted above the limiting support strip 22. The limiting support strip 22 supports the wire pressing plate 23 to ensure the installation stability of the wire pressing plate 23. A wire core 24 located outside the separating contact piece 19 is arranged between the two wire pressing plates 23. The wire core 24 is separated, half of which is located on one side of the wire pressing plate 23 and generally located on the other side of the wire pressing plate 23. The wire core 24 is pressurized by the wire pressing plate 23 to fix the wire core 24 after installation. A wire sheath 25 is fixedly sleeved outside the wire core 24. The wire core 24 and the wire sheath 25 form an electric wire for signal transmission.

[0040] A wire threading groove 2301 is provided on the wire pressing plate 23 , and the separated portion of the top of the wire core 24 is located in the wire threading groove 2301 . The wire core 24 is bent and passed through the wire threading groove 2301 , thereby further providing an installation and fixing effect for the wire core 24 .

[0041] A signal transmission line 26 is provided between the component mounting seats 18 for connection, and an insertion plate 27 is provided at both ends of the signal transmission line 26. A circular convex strip 2701 is provided at the outer end of the insertion plate 27. The circular convex strip 2701 and the insertion plate 27 are both movably engaged in the positioning slot 1801 provided on the component mounting seat 18. The signal between the two component mounting seats 18 is transmitted through the signal transmission line 26. When the signal transmission line 26 is installed between the component mounting seats 18, the insertion plate 27 on the signal transmission line 26 is inserted into the positioning slot 1801 on the component mounting seat 18 to realize the assembly of the two. One side is driven by a small frequency and the other side is driven by a large frequency. According to the frequency modulation requirements, the rotation of the corresponding adjustable mounting cap 5 is selected, and the signal generated by the structure of the small frequency drive can be transmitted to the structure of the large frequency drive.

[0042] A pressure-bearing protrusion 28 is fixed on the outer wall of the insertion plate 27, and the structure composed of the insertion plate 27 and the circular protrusion 2701 is adapted to the shape of the positioning slot 1801. The existence of the pressure-bearing protrusion 28 can press the insertion plate 27 to drive the insertion plate 27 to deform, thereby realizing the disassembly of the signal transmission line 26.

[0043] A circular protective sleeve 29 is provided outside the switch body 17, and a support bar 30 is fixedly installed on the bottom end of the circular protective sleeve 29. The support bar 30 is fixedly installed on the outer wall of the switch body 17. The circular protective sleeve 29 and the support bar 30 form a heat dissipation structure, and at the same time protect the switch body 17 to prevent the switch body 17 from being damaged.

[0044] An isolation cover 31 is fixedly installed on the outer wall of the switch body 17. An annular fixing strip 32 is fixedly sleeved on the outer wall of the isolation cover 31 near the bottom and the bottom. The isolation cover 31 and the annular fixing strip 32 constitute a device for isolating electromagnetic signals to prevent electromagnetic signals from affecting the normal operation of the internal structure of the switch body 17. The isolation cover 31 is sprayed with electromagnetic shielding paint, and the electromagnetic shielding paint contains conductive particles, such as silver powder, copper powder or carbon powder. When the paint is applied to the surface of an object, these conductive particles are interconnected to form a conductive network. When an electromagnetic signal acts on a surface coated with the shielding paint, the conductive network will generate an induced current like a metal shield, thereby shielding the electromagnetic signal.

[0045] Working principle:

[0046] The first step: the hexagonal rotating column 4 is inserted into the corresponding groove at the bottom of the adjustable mounting cap 5, and the circular locking seat 6 is rotated by a wrench. The rotation of the circular locking seat 6 drives the threaded mounting column 7 to rotate. When the threaded mounting column 7 rotates, the inner thread of the hexagonal rotating column 4 moves, and the circular locking seat 6 also moves in the circular mounting groove 501, thereby realizing the combination between the adjustable mounting cap 5 and the hexagonal rotating column 4. After the hexagonal rotating column 4 and the adjustable mounting cap 5 are combined, the hand contacts the auxiliary push ring 16 during adjustment, and an upward pulling force is applied to the auxiliary push ring 16. After the auxiliary push ring 16 is subjected to the pulling force, the pulling force is transmitted to the lifting adjustment ring 8, thereby driving the lifting adjustment ring 8 to lift and lower outside the hexagonal rotating column 4. When the lifting adjustment ring 8 is lifted and lowered outside the hexagonal rotating column 4, it drives the vertical elastic plate 9 and the elliptical protrusion 901 to form a structure to move upward. When the elliptical protrusion 901 and the elliptical protrusion 901 form a structure to move upward, the vertical elastic plate 9 is deformed and detached from the fixed holder 10, and the lifting and lowering adjustment After the ring 8 moves upward, the annular pressure ring 15 no longer applies pressure to the structure composed of the deformable pressure strip 13 and the elastic pressure plate 14, and the elastic pressure plate 14 no longer applies pressure to the locking convex strip 12. After the elastic pressure plate 14 is no longer restricted, the structure composed of the elastic pressure plate 14 and the hexagonal rotating column 4 can rotate normally. After the adjustment is completed, the hand applies pressure to the auxiliary pushing ring 16 and the lifting and adjusting ring 8, and the auxiliary pushing ring 16 and the lifting and adjusting ring 8 structure drive the annular pressure ring 15 to descend, and the annular pressure ring 15 applies pressure to the deformable pressure strip 13 and the elastic pressure plate 14. The strip 13 and the elastic pressure plate 14 form a structure that applies pressure, the deformable pressure strip 13 is deformed, the elastic pressure plate 14 contacts the locking convex strip 12, the friction between the elastic pressure plate 14 and the locking convex strip 12 increases, and the elastic pressure plate 14 is unable to move due to resistance, thereby achieving the limitation of the structure composed of the deformable pressure strip 13 and the hexagonal rotating column 4, preventing the structure composed of the deformable pressure strip 13 and the hexagonal rotating column 4 from moving, thereby preventing the adjustable mounting cap 5 from being accidentally touched and causing the adjustable mounting cap 5 to rotate.

[0047] Step 2: When performing frequency modulation operation, the adjustable mounting cap 5 on the side with smaller frequency can be adjusted. After the adjustable mounting cap 5 at this position is rotated, a corresponding signal is generated. The signal at this position is then transmitted to the device on the side with larger frequency through the signal transmission line 26 to ensure the signal transmission effect. Through the cooperation of the two frequency adjustment devices, the accuracy of the adjustment frequency is improved, and the signal transmission line 26 can be removed from between the two component mounting seats 18. For disassembly, press the pressed protrusion 28 to deform the insertion plate 27, and the insertion plate 27 is no longer engaged in the component mounting seat 18, so that the signal transmission line 26 can be pulled out.

[0048] Step 3: An isolation cover 31 is provided outside the switch body 17, and the isolation cover 31 isolates the switch body 17 from electromagnetic signals to prevent the electrical components in the switch body 17 from being affected by the electromagnetic signals. The annular fixing strip 32 limits and fixes the isolation cover 31 from the top and bottom positions of the isolation cover 31 to ensure the fixing effect of the isolation cover 31. At the same time, the circular protective sleeve 29 is located outside the isolation cover 31 to protect the isolation cover 31 to prevent the isolation cover 31 from being damaged by external force, thereby improving the service life of the isolation cover 31.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Precision frequency adjustment switch for digital intercom, characterized by: The invention comprises a hexagonal clamping part (2) mounted on a walkie-talkie body (1), the top and bottom of the hexagonal clamping part (2) are fixedly mounted with circular limiting parts (3), the circular limiting part (3) is rotatably connected with a hexagonal rotating column (4), the outer movable sleeve of the hexagonal rotating column (4) is provided with an adjustable mounting cap (5), a circular locking seat (6) is movably mounted in a circular mounting groove (501) provided on the adjustable mounting cap (5), a threaded mounting column (7) is fixedly mounted at the bottom of the circular locking seat (6), the threaded mounting column (7) is threadedly mounted in the hexagonal rotating column (4), the outer movable sleeve of the hexagonal rotating column (4) is provided with a lifting adjustment ring (8), the bottom of the lifting adjustment ring (8) is provided with a vertical assembly groove (801), a vertical elastic plate (9) is fixedly mounted in the vertical assembly groove (801), and the vertical elastic plate (9) is fixedly mounted in the vertical assembly groove (801). An elliptical protrusion (901) is fixedly installed at the bottom end of the straight elastic plate (9), and the structure composed of the vertical elastic plate (9) and the elliptical protrusion (901) is movably inserted in the fixed card seat (10). The fixed card seat (10) is installed at a position corresponding to the vertical assembly groove (801) on the upper surface of the intercom body (1). The outer movable sleeve of the hexagonal rotating column (4) is provided with a fixed locking seat (11), and locking protrusions (12) are fixedly installed at equal intervals on the circumferential outer wall of the fixed locking seat (11). A plurality of deformable pressure strips (13) are distributed in an annular array on the top of the fixed locking seat (11) with the central axis of the fixed locking seat (11) as the array center. An elastic pressure plate (14) is fixedly installed on the lower surface of the outer end of the deformable pressure strip (13), and an annular pressure ring (15) is fixedly installed on the bottom of the inner wall of the lifting and lowering adjustment ring (8).

2. The precise frequency adjustment switch for a digital intercom according to claim 1, characterized in that: The inner wall of the fixed clamping seat (10) is provided with a groove adapted to the structure composed of the vertical elastic plate (9) and the elliptical protrusion (901).

3. The precise frequency adjustment switch for a digital intercom according to claim 2, characterized in that: An auxiliary pushing ring (16) is coaxially fixedly mounted on the outer wall of the lifting and adjusting ring (8).

4. The precise frequency adjustment switch for a digital intercom according to claim 3, characterized in that: The annular pressure ring (15) is arranged at a corresponding position directly above the elastic pressure plate (14).

5. The precise frequency adjustment switch for a digital intercom according to claim 4, characterized in that: A switch body (17) is fixedly mounted on the bottom of the circular limiting portion (3) located at the bottom, a component mounting seat (18) is fixedly mounted on the bottom of the switch body (17), a partition contact (19) is fixedly mounted on the bottom of the component mounting seat (18), a vertical assembly bar (20) is also fixedly mounted on the bottom of the component mounting seat (18), and the vertical assembly bar (20) is located on both sides of the partition contact (19), protective cover plates (21) are movably mounted on both sides of the vertical assembly bar (20), and the two protective cover plates (21) are fixedly connected by bolts, a limiting support bar (22) is fixedly mounted on the inner wall of the protective cover plate (21), a wire pressing plate (23) is movably mounted on the upper side of the limiting support bar (22), a wire core (24) located outside the partition contact (19) is arranged between the two wire pressing plates (23), and a wire sheath (25) is fixedly sleeved outside the wire core (24).

6. The precise frequency adjustment switch for a digital intercom according to claim 5, characterized in that: The wire pressing plate (23) is provided with a wire threading groove (2301), and the separated portion at the top end of the wire core (24) is located in the wire threading groove (2301).

7. The precise frequency adjustment switch for a digital intercom according to claim 6, characterized in that: A signal transmission line (26) is provided between the component mounting seats (18) for connection, an insertion plate (27) is provided at both ends of the signal transmission line (26), a circular convex strip (2701) is provided at the outer end of the insertion plate (27), and the circular convex strip (2701) and the insertion plate (27) are both movably engaged in a positioning slot (1801) provided on the component mounting seat (18).

8. The precise frequency adjustment switch for a digital intercom according to claim 7, characterized in that: A pressure-bearing protrusion (28) is fixed on the outer wall of the insertion plate (27), and the structure formed by the insertion plate (27) and the circular protrusion (2701) is compatible with the shape of the positioning slot (1801).

9. The precise frequency adjustment switch for a digital intercom according to claim 8, characterized in that: A circular protective sleeve (29) is arranged outside the switch body (17), a support bar (30) is fixedly mounted on the bottom end of the circular protective sleeve (29), and the support bar (30) is fixedly mounted on the outer wall of the switch body (17).

10. The precise frequency adjustment switch for a digital intercom according to claim 9, characterized in that: An isolation cover (31) is fixedly mounted on the outer wall of the switch body (17), and an annular fixing strip (32) is fixedly sleeved on the outer wall of the isolation cover (31) near the bottom and at the bottom.

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