Noise reduction interphone

Abstract

The utility model discloses a noise reduction interphone, which comprises a machine body, a sound receiving hole is arranged on the machine body, a protective cover for switching between a first state and a second state is arranged on the machine body, the protective cover comprises a main baffle plate hinged with the machine body and a side baffle plate arranged on the main baffle plate, the side baffle plate is in sliding connection with the side wall of the machine body, and a locking part is arranged on the side wall of the machine body. In the second state, the main baffle of the protective cover, the side baffle and the machine body define a sound receiving cavity with a sound transmission opening in one side, the sound receiving cavity is communicated with the sound receiving hole, sound is released into the sound receiving cavity through the sound transmission opening, and therefore the sound is transmitted to the sound receiving hole. The protective cover is used for blocking external noise, so that the sound receiving effect of the sound receiving hole is improved, and the influence of the external noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intercoms, in particular to a noise reduction intercom. Background Art

[0002] A walkie-talkie is a two-way mobile communication tool that allows calls without any network support. It is suitable for relatively fixed and frequent calls.

[0003] Traditional intercoms are provided with a sound receiving hole. During use, the intercom needs to be placed near the sound receiving hole of the intercom and speak to transmit the sound to the designated contact person.

[0004] Walkie-talkies are used in environments such as buildings, rail transit, construction sites, mining, and security. During use, there is often considerable noise or dust. To reduce the impact of this noise on sound transmission, it is often necessary to cover the radio's sound port with your hand and speak loudly to ensure clear communication. This noise reduction method is very inconvenient during use.

[0005] Therefore, how to design a walkie-talkie that can reduce the influence of noise has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a noise reduction intercom to solve the problem of the influence of external noise on the sound transmission quality during operation.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A noise reduction intercom comprises a body, a sound receiving hole is provided on the body, and a protective cover that can be switched between a first state and a second state is provided on the body. The protective cover comprises a main baffle hinged to the body and side baffles installed on the main baffle, the side baffles are slidably connected to the side walls of the body, and a locking component is provided on the side walls of the body, the locking component is used to lock the main baffle and cover the sound receiving hole. In the second state, the main baffle, the side baffle and the body of the protective cover surround a sound receiving cavity with a sound transmission port on one side, and the sound receiving cavity is connected to the sound receiving hole.

[0009] Furthermore, a mounting portion is fixedly provided on the fuselage, the end walls of the mounting portion are provided with hinge holes, a connecting portion aligned with the mounting portion is provided on the side baffle, and a hinged part hinged to the mounting portion is provided on the connecting portion.

[0010] Furthermore, the hinged member includes a threaded hole provided on the connecting portion, a bolt extending to the hinged hole is threadedly connected in the threaded hole, and an outer wall of the bolt is rotatably connected to an inner wall of the hinged hole.

[0011] Furthermore, it also includes a torsion spring sleeved on the outside of the bolt, one end of the torsion spring is fixedly connected to the mounting portion, and the other end of the torsion spring is fixedly connected to the connecting portion. In the first state, the torsion spring is in a torsion state, and in the second state, the torsion spring is in a non-twisted state.

[0012] Furthermore, the side wall of the fuselage is provided with a guide groove coaxial with the hinge hole, and a guide slider inserted into the guide groove is fixedly provided on the side baffle, and the side wall of the guide slider is slidably connected to the inner wall of the guide groove.

[0013] Furthermore, the locking component includes a locking groove opened in the fuselage, a push plate is slidably connected in the locking groove, and also includes a compression spring, one end of the compression spring abuts against the push plate, and the other end of the compression spring abuts against the inner wall of the locking groove. A locking hole is provided on the side baffle, and a locking head is fixed on the push plate, which passes through the side wall of the fuselage and extends to the locking hole.

[0014] Furthermore, a first through hole and a second through hole connected to the locking groove are provided on the side wall of the fuselage, the locking head extends out of the fuselage through the second through hole, and a button is fixed on the push plate and extends out of the fuselage through the first through hole.

[0015] Furthermore, a positioning retaining ring is fixedly provided on one side wall of the main baffle close to the fuselage and surrounds the outside of the sound receiving hole. A sealing gasket is fixed on the positioning retaining ring. In the first state, the sealing gasket is in contact with the fuselage.

[0016] Furthermore, the main baffle is provided with a first sound transmission hole aligned with the sound receiving hole, and the positioning retaining ring is also provided with a blocking component for opening or closing the first sound transmission hole. The blocking component includes a guide rod fixed on the positioning retaining ring, and a blocking plate is slidably connected to the guide rod, and the blocking plate is provided with a plurality of second sound transmission holes.

[0017] Furthermore, the main baffle is provided with a waist-shaped hole arranged along the axial direction of the guide rod, and the sealing plate is fixed with a pushing block that passes through the waist-shaped hole and extends to the outside of the main baffle. When the first sound transmission hole and the second sound transmission hole are aligned with each other, the first sound transmission hole is opened, and when the first sound transmission hole and the second sound transmission hole are misaligned with each other, the first sound transmission hole is closed.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the present invention switches the protective cover between the first state and the second state according to the external environment. In a noisy environment, the protective cover is switched to the second state, at which time the locking component releases the lock on the protective cover, and a sound receiving cavity with a sound transmission port on one side is enclosed between the protective cover and the body. The sound transmission port is used to release sound into the sound receiving cavity, thereby transmitting the sound to the sound receiving hole. The protective cover blocks external noise, thereby improving the sound receiving effect of the sound receiving hole and reducing the influence of external noise.

[0019] When the intercom is not in use, the protective cover is locked to the body using the locking component, freeing up the space in the sound receiving cavity and making it easier to store the intercom. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the first state of the utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the second state of the utility model;

[0023] Figure 4 It is a partially enlarged schematic diagram of the utility model;

[0024] Figure 5 It is a partial expanded schematic diagram of the utility model;

[0025] Figure 6 This is the first partial cross-sectional view of the utility model;

[0026] Figure 7 This is the second partial cross-sectional view of the utility model.

[0027] In the figure: 1. body; 10. sound receiving hole; 11. mounting portion; 111. hinge hole; 112. first mounting ring groove; 12. guide groove; 2. protective cover; 21. main baffle; 22. side baffle; 221. locking hole; 222. guide slider; 23. connecting portion; 231. threaded hole; 232. second mounting ring groove; 24. positioning retaining ring; 25. sealing gasket; 26. first sound transmission hole; 27. waist-shaped hole; 28. guide rod; 3. hinge; 31. bolt; 32. torsion spring; 4. locking component; 41. locking groove; 411. first through hole; 412. second through hole; 42. push plate; 421. button; 422. locking head; 43. compression spring; 5. blocking component; 51. blocking plate; 511. second sound transmission hole; 52. push block; 100. sound transmission port. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] This embodiment provides a noise reduction intercom, which is mainly used to solve the problem of high external noise affecting the sound collection effect of the intercom.

[0030] like Figure 1 and Figure 2 As shown, the intercom includes a body 1, wherein the body 1 is provided with a plurality of sound receiving holes 10 for collecting external sounds, and a mounting portion 11 is provided on the body 1. Specifically, the mounting portion 11 is located at the top of the sound receiving hole 10, and a protective cover 2 that switches between a first state and a second state is rotatably mounted on both ends of the mounting portion 11 through a hinge 3. The side wall of the body 1 is also provided with a locking component 4 for locking the protective cover 2, as shown in FIG. Figure 1 As shown, in the first state, the locking component 4 locks the protective cover 2, and the protective cover 2 is used to cover the sound receiving hole 10; in the second state, the locking component 4 releases the lock of the protective cover 2, and a sound receiving cavity with a sound transmission port 100 on one side is formed between the protective cover 2 and the body 1, and the sound receiving cavity can collect sound from the sound transmission port 100 and transmit it to the sound receiving hole 10.

[0031] Specifically, in this embodiment, Figure 3 As shown, the protective cover 2 includes a main baffle 21 and side baffles 22 vertically mounted on the sides of the main baffle 21. The side baffles 22 are triangular in shape. The main baffle 21 covers the sound receiving hole 10. The side baffles 22 are slidably connected to the side walls of the body 1 and serve as side panels of the sound receiving cavity to prevent sound entering through the sound transmission port 100 from leaking out. The side baffles 22 also block external noise from entering the sound receiving cavity, thereby reducing the impact of external noise on the intercom.

[0032] In order to realize the rotation of the protective cover 2, in this embodiment, as shown in FIG. Figure 4 As shown, the ends of the mounting portion 11 are provided with hinge holes 111, and the side baffle 22 is fixedly provided with a connecting portion 23 aligned with the hinge hole 111, wherein the connecting portion 23 is provided with a threaded hole 231 aligned with the hinge hole 111, and the hinge part 3 includes a bolt 31, wherein the bolt 31 is threadedly connected to the threaded hole 231. After the bolt 31 is installed, the end of the bolt 31 extends out of the threaded hole 231 and extends into the hinge hole 111. Specifically, two groups of bolts 31 are provided and are respectively on both sides of the mounting portion 11. When the bolts 31 on both sides are inserted into the hinge hole 111, the protective cover 2 can be rotated around the mounting portion 11 through the bolt 31.

[0033] It is worth noting here that the bolt 31 is threadedly connected to the threaded hole 231. When the bolt 31 rotates, the end of the bolt 31 exits the hinge hole 111. Then, the hinge relationship between the protective cover 2 and the mounting portion 11 is released, and the protective cover 2 can be removed from the fuselage 1.

[0034] When the locking member 4 releases the lock on the protective cover 2, the protective cover 2 is in the second state. At this time, the protective cover 2 and the body 1 form a sound receiving cavity, and sound can be transmitted to the inside of the sound receiving cavity through the sound transmission port 100. In order to keep the protective cover 2 in the open state, in this embodiment, as shown in FIG. Figure 2and Figure 4 As shown, a torsion spring 32 is also included, specifically, as shown in FIG. Figure 5 As shown, the torsion spring 32 is sleeved on the outside of the bolt 31, one end of the torsion spring 32 is fixedly connected to the mounting portion 11, and the other end of the torsion spring 32 is fixedly connected to the connecting portion 23; in the first state, the torsion spring 32 is in a force storage state, and in the second state, the torsion spring 32 is in a relaxed state with no torsional torque.

[0035] In order to enable the protective cover 2 to rotate stably around the bolt 31, in this embodiment, as shown in FIG. Figure 3 and Figure 5 As shown, the side wall of the fuselage 1 is provided with a guide groove 12 coaxial with the hinge hole 111 , and a guide slider 222 is fixed on the side baffle 22 and inserted into the guide groove 12 , wherein the guide slider 222 is slidably connected to the guide groove 12 .

[0036] In order to further realize the installation of the torsion spring 32, in this embodiment, as shown in FIG. Figure 4 As shown, a first mounting ring groove 112 is provided on the end wall of the mounting portion 11, and a second mounting ring groove 232 is provided on the connecting portion 23, which is aligned with the first mounting ring groove 112, wherein one end of the torsion spring 32 is installed in the first mounting ring groove 112, and the other end of the torsion spring 32 is installed in the second mounting ring groove 232.

[0037] When the intercom is not in use, the protective cover 2 is in the first state. Since the torsion spring 32 is in the stored state, in order to lock the protective cover 2, as shown in FIG. Figure 5 and Figure 7 As shown, the locking component 4 includes a locking groove 41 opened in the side wall of the fuselage 1, wherein a push plate 42 is slidably connected in the locking groove 41, and also includes a compression spring 43, one end of the compression spring 43 abuts against the push plate 42, and the other end of the compression spring 43 abuts against the inner wall of the locking groove 41, and a locking head 422 extending from the fuselage 1 is fixedly provided on the push plate 42, and a locking hole 221 for inserting the locking head 422 is provided on the side baffle 22.

[0038] Through the above arrangement, when the intercom is not in use, the main baffle 21 of the protective cover 2 is attached to the body 1. At this time, the locking hole 221 is aligned with the locking head 422, and the compression spring 43 inserts the locking head 422 into the locking hole 221 through the push plate 42, thereby achieving the locking of the protective cover 2.

[0039] Specifically, in this embodiment, Figure 7 As shown, the side wall of the fuselage 1 is provided with a first through-hole 411 and a second through-hole 412 which are connected to the locking groove 41, wherein the locking head 422 extends out of the fuselage 1 through the second through-hole 412, and a button 421 is fixed on the push plate 42 and extends out of the fuselage 1 through the first through-hole 411.

[0040] When using the intercom in a noisy environment, the push plate 42 is pressed by the button 421. At this time, the push plate 42 drives the locking head 422 to retreat into the locking groove 41, and the locking head 422 exits the locking hole 221, releasing the lock of the protective cover 2. At this time, the protective cover 2 is opened under the action of the torsion spring 32, thereby facilitating the use of the intercom.

[0041] The protective cover 2 switches from the first state to the second state mainly to cope with noisy environments. In the second state, a sound receiving cavity is formed between the protective cover 2 and the body 1, which will cause the volume of the intercom to become larger. When the outside world is relatively quiet, the intercom in the second state will be affected by the volume problem. Therefore, in the embodiment, Figure 3 and Figure 5 As shown, the intercom is further optimized, wherein a first sound transmission hole 26 aligned with the sound receiving hole 10 is provided on the main baffle 21, and a blocking component 5 for switching the first sound transmission hole 26 to be opened and closed is also included.

[0042] With the above arrangement, when the outside world is relatively quiet, the locking component 4 locks the protective cover 2 and maintains it in the first state. At the same time, the blocking component 5 opens the first sound transmission hole 26. At this time, sound is collected from the first sound transmission hole 26 and transmitted to the sound receiving hole 10. At this time, the intercom can be used normally.

[0043] If there is a lot of dust in the external environment, when the intercom is in the first state, the external dust can easily enter the sound receiving hole 10 through the first sound transmission hole 26, thereby causing the sound receiving hole 10 to be blocked, affecting the use effect of the intercom. Therefore, when the intercom is not in use, the first sound transmission hole 26 can be blocked by the blocking component 5 to prevent external dust from contacting the sound receiving hole 10.

[0044] When the intercom is used in the first state, in order to prevent the sound entering from the first sound transmission hole 26 from flowing out from the gap between the protective cover 2 and the body 1, the outflow here refers to the loss of energy, so it is necessary to make up the gap between the protective cover 2 and the body 1, such as Figure 5 and Figure 6 As shown, a positioning retaining ring 24 is provided on the main baffle 21 of the protective cover 2 and is arranged around the first sound transmission hole 26, wherein a sealing gasket 25 is fixed on the positioning retaining ring 24, and the sealing gasket 25 is made of rubber. In the first state, the sealing gasket 25 abuts against the fuselage 1 to solve the gap left between the protective cover 2 and the fuselage 1 and reduce the loss of sound energy.

[0045] In order to achieve the blocking of the first sound transmission hole 26, in this embodiment, as shown in FIG. Figure 5 and Figure 6As shown, the blocking component 5 includes a guide rod 28 and a blocking plate 51, wherein the guide rod 28 is fixedly mounted on the positioning retaining ring 24, and the guide rod 28 passes through the blocking plate 51 and is slidably connected to the blocking plate 51. In order to enable the sound of the first sound transmission hole 26 to pass through the blocking plate 51 and be transmitted to the sound receiving hole 10, in this embodiment, as shown in FIG. Figure 5 As shown, a plurality of second sound transmission holes 511 are provided on the blocking plate 51. When the intercom is in use, the first sound transmission hole 26, the second sound transmission hole 511 and the sound receiving hole 10 are aligned with each other, thereby facilitating the transmission of sound.

[0046] When the intercom is not in use, the second sound hole 511 and the first sound hole 26 are displaced from each other by sliding the blocking plate 51, and the first sound hole 26 is blocked by the blocking plate 51, thereby preventing the entry of external dust.

[0047] In order to realize the movement of the blocking plate 51, in this embodiment, as shown in FIG. Figure 5 and Figure 6 As shown, the main baffle 21 is provided with a waist-shaped hole 27 axially arranged along the guide rod 28, and the sealing plate 51 is fixed with a push block 52 that passes through the waist-shaped hole 27 and extends to the outside of the main baffle 21, and the side wall of the push block 52 is slidably connected to the inner wall of the waist-shaped hole 27.

[0048] Through the above arrangement, by changing the position of the pushing block 52 , the blocking plate 51 is driven, thereby realizing the switching between the open and closed states of the first sound transmission hole 26 .

[0049] In summary, in a noisy environment, the intercom needs to be kept in the second state when in use, wherein the second sound transmission hole 511 on the blocking plate 51 is offset from the first sound transmission hole 26, leaving a sound receiving cavity between the protective cover 2 and the body 1, transmitting sound from the sound transmission port 100 to the sound receiving hole 10;

[0050] In a quiet environment, in order to facilitate the use of the intercom, the protective cover 2 can be maintained in the first state. At this time, the position of the blocking plate 51 is changed by the pushing block 52 so that the first sound transmission hole 26 and the second sound transmission hole 511 are aligned with each other. At this time, the sound can be directly transmitted to the sound receiving hole 10 through the first sound transmission hole 26 and the second sound transmission hole 511;

[0051] In a dusty environment, in order to prevent dust from entering the sound receiving hole 10, the protective cover 2 needs to be placed in the first state, and the protective cover 2 needs to be locked using the locking component 4. Then, the first sound transmission hole 26 and the second sound transmission hole 511 are offset from each other, and the first sound transmission hole 26 is blocked using the blocking plate 51 to prevent dust from entering the sound receiving hole 10.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A noise reduction intercom, comprising a body (1), the body (1) being provided with a sound receiving hole (10), characterized in that: A protective cover (2) is provided on the body (1) and is switchable between a first state and a second state. The protective cover (2) comprises a main baffle (21) hinged to the body (1) and a side baffle (22) mounted on the main baffle (21). The side baffle (22) is slidably connected to the side wall of the body (1). A locking component (4) is provided on the side wall of the body (1). The locking component (4) is used to lock the main baffle (21) and cover the sound receiving hole (10). In the second state, the main baffle (21), the side baffle (22) and the body (1) of the protective cover (2) enclose a sound receiving cavity with a sound transmission port (100) on one side, and the sound receiving cavity is communicated with the sound receiving hole (10).

2. The noise reduction intercom according to claim 1, characterized in that: A mounting portion (11) is fixedly provided on the fuselage (1), and end walls of the mounting portion (11) are provided with hinge holes (111). A connecting portion (23) aligned with the mounting portion (11) is provided on the side baffle (22), and a hinged member (3) hingedly connected to the mounting portion (11) is provided on the connecting portion (23).

3. The noise reduction intercom according to claim 2, characterized in that: The hinge (3) includes a threaded hole (231) formed on the connecting portion (23); a bolt (31) extending to the hinge hole (111) is threadedly connected to the threaded hole (231); and an outer wall of the bolt (31) is rotatably connected to an inner wall of the hinge hole (111).

4. The noise reduction intercom according to claim 3, characterized in that: The invention also includes a torsion spring (32) sleeved on the outside of the bolt (31), one end of the torsion spring (32) is fixedly connected to the mounting portion (11), and the other end of the torsion spring (32) is fixedly connected to the connecting portion (23). In a first state, the torsion spring (32) is in a torsion state, and in a second state, the torsion spring (32) is in a non-twisted state.

5. The noise reduction intercom according to claim 2, characterized in that: The side wall of the fuselage (1) is provided with a guide groove (12) coaxial with the hinge hole (111); a guide slider (222) is fixedly provided on the side baffle (22) and plugged into the guide groove (12); the side wall of the guide slider (222) is slidably connected to the inner wall of the guide groove (12).

6. The noise reduction intercom according to claim 1 or 5, characterized in that: The locking component (4) includes a locking groove (41) provided in the body (1), a push plate (42) slidably connected in the locking groove (41), and a compression spring (43), one end of the compression spring (43) abuts against the push plate (42), and the other end of the compression spring (43) abuts against the inner wall of the locking groove (41), a locking hole (221) is provided on the side baffle (22), and a locking head (422) is fixed on the push plate (42) and extends from the side wall of the body (1) to the locking hole (221).

7. The noise reduction intercom according to claim 6, characterized in that: A first through-hole (411) and a second through-hole (412) communicating with the locking groove (41) are provided on the side wall of the body (1); a locking head (422) extends out of the body (1) through the second through-hole (412); and a button (421) is fixedly provided on the push plate (42) and extends out of the body (1) through the first through-hole (411).

8. The noise reduction intercom according to claim 6, characterized in that: A positioning retaining ring (24) is fixedly provided on a side wall of the main baffle (21) close to the body (1) and is arranged around the outside of the sound receiving hole (10). A sealing gasket (25) is fixedly provided on the positioning retaining ring (24). In the first state, the sealing gasket (25) is in contact with the body (1).

9. The noise reduction intercom according to claim 8, characterized in that: A first sound transmission hole (26) aligned with the sound receiving hole (10) is provided on the main baffle (21), and a blocking component (5) for opening or closing the first sound transmission hole (26) is further provided on the positioning retaining ring (24). The blocking component (5) includes a guide rod (28) fixed on the positioning retaining ring (24), and a blocking plate (51) is slidably connected to the guide rod (28). The blocking plate (51) is provided with a plurality of second sound transmission holes (511).

10. The noise reduction intercom according to claim 9, characterized in that: The main baffle (21) is provided with a waist-shaped hole (27) axially arranged along the guide rod (28), and the blocking plate (51) is fixed with a push block (52) that passes through the waist-shaped hole (27) and extends to the outside of the main baffle (21). When the first sound transmission hole (26) and the second sound transmission hole (511) are aligned with each other, the first sound transmission hole (26) is opened, and when the first sound transmission hole (26) and the second sound transmission hole (511) are misaligned with each other, the first sound transmission hole (26) is closed.

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