Dual-unit receiver

Abstract

The utility model relates to a double-unit receiver. Mainly comprises a first shell, a second shell and a third shell which are sequentially arranged, coils, magnet blocks and flat reeds are arranged in the first shell and the third shell, two vibrating diaphragms are arranged in the second shell and connected with the adjacent reeds through guide pins respectively, and a sound outlet cavity is further formed in the second shell. According to the invention, a magnet frame is omitted, magnetic conduction is realized through the housing, the shape of the reed is changed into a flat plate shape, the spaces among the first housing, the second housing and the third housing are communicated through the through holes, the two diaphragms share one sound outlet cavity, and the layout of each internal component is reasonably planned. Therefore, the overall thickness of the double-unit receiver is effectively reduced. The overall thickness of the structure can be smaller than or equal to 2.5 mm.

Description

Technical Field

[0001] The utility model relates to the field of receivers, in particular to a double-unit receiver. Background Art

[0002] A receiver typically consists of a coil, reed, guide pins, magnet frame, magnet, and diaphragm. The reed's vibration is transmitted to the diaphragm through the guide pins, causing it to vibrate. This vibration generates sound pressure.

[0003] Among existing receivers, there is a dual-unit receiver. For example, Chinese Patent No. 2016214069098 discloses a coupled electroacoustic conversion device, which includes a first receiver and a second receiver. The vibration direction of the first vibrator of the first receiver is opposite to the vibration direction of the second vibrator of the second receiver.

[0004] This type of dual-unit receiver has the following drawbacks: The layout and structure of its internal components are not rational, resulting in a thicker receiver. Furthermore, typical dual-unit receivers are composed of two separate receivers spliced ​​together, meaning the total thickness of the two receivers is calculated as: the thickness of the individual receivers * 2 + the combined tolerance, where the combined tolerance refers to the thickness of the glue layer between the two receivers. This design approach results in a relatively thick overall dual-unit receiver. Utility Model Content

[0005] Based on this, it is necessary to provide a dual-unit receiver to address the problem that the overall size of the dual-unit receiver is relatively thick.

[0006] A dual-unit receiver includes a first housing, a second housing, and a third housing, the first housing containing a first coil, a first magnet, a second magnet, and a first reed. The first reed is a flat reed, including a main body and a connecting portion. The connecting portion of the first reed is connected to the first housing. The first coil is enclosed at one end of the main body of the first reed. The first magnet and the second magnet are respectively disposed on both sides of the other end of the main body of the first reed, with the first magnet bonded to the inner wall of the adjacent first housing, and the second magnet bonded to the inner wall of the adjacent first housing. The first housing is made of a magnetically conductive material.

[0007] The inner cavity of the second shell forms a sound cavity, the first diaphragm and the second diaphragm are arranged in the second shell at intervals, and a sound hole is provided at one end of the second shell.

[0008] A second coil, a third magnet block, a fourth magnet block and a second reed are arranged in the third shell. The second reed is a flat reed. The second reed includes a main body and a connecting portion. The connecting portion of the second reed is connected to the third shell. The second coil is jacketed around one end of the main body of the second reed. The third magnet block and the fourth magnet block are respectively arranged on both sides of the other end of the main body of the second reed. The third magnet block is bonded to the inner wall of the adjacent third shell. The fourth magnet block is bonded to the inner wall of the adjacent third shell. The material of the third shell is a magnetic conductive material.

[0009] The second shell is respectively provided with second-type through holes at both ends, the first shell is provided with a first-type through hole at one end close to the second shell, and the first-type through hole is connected to the adjacent second-type through hole, the third shell is provided with a third-type through hole at one end close to the second shell, and the third-type through hole is connected to the adjacent second-type through hole, and also includes a first guide pin and a second guide pin, the first guide pin is located between the second magnet and the first coil, one end of the first guide pin is connected to the first reed, the other end of the first guide pin passes through the first and second-type through holes and is connected to the first diaphragm, the second guide pin is located between the third magnet and the second coil, one end of the second guide pin is connected to the second reed, the other end of the second guide pin passes through the third and second-type through holes and is connected to the second diaphragm.

[0010] In one embodiment, the opening area of ​​the second type of through holes is larger than the opening area of ​​the first type of through holes, the opening area of ​​the second type of through holes is larger than the opening area of ​​the third type of through holes, and the second type of through holes extends from one end of the second shell to the other end of the second shell.

[0011] In one embodiment, the first shell and the third shell have the same structure, the first shell includes an upper half shell and a lower half shell, the connecting portion of the first reed is clamped between the upper half shell and the lower half shell of the first shell, and the connecting portion of the second reed is clamped between the upper half shell and the lower half shell of the third shell.

[0012] In one embodiment, one side of the first coil is attached to the first housing, and the positive and negative electrodes of the first coil are connected to a first FPC board disposed within the first housing and attached to the other side of the first coil. The first FPC board is provided with a positive lead portion and a negative lead portion, and the positive lead portion and the negative lead portion are respectively connected to a first PCB board disposed outside the first housing.

[0013] One side of the second coil is bonded to the third shell, and the positive and negative poles of the second coil are connected to a second FPC board arranged in the third shell and bonded to the other side of the second coil. The second FPC board is provided with a positive lead-out portion and a negative lead-out portion, and the positive lead-out portion and the negative lead-out portion are respectively connected to a second PCB board arranged on the outside of the third shell.

[0014] In one embodiment, the first shell material is an iron-nickel alloy, and the second shell material is an iron-nickel alloy.

[0015] In one embodiment, the connecting portion of the first reed is located outside the main body, and the connecting portion of the first reed has two extension arms, a gap is provided between the extension arms and the main body, and the shape of the second reed is the same as that of the first reed.

[0016] In one embodiment, the outer edge of the first diaphragm is connected to the second shell, and the outer edge of the second diaphragm is connected to the second shell.

[0017] In one embodiment, a first support portion is provided on the first shell at one side of the first type of through hole, and the first support portion is used to connect to the second magnet; a third support portion is provided on the third shell at one side of the third type of through hole, and the third support portion is used to connect to the third magnet.

[0018] In one embodiment, the overall thickness of the first shell, the second shell, and the third shell is less than or equal to 2.5 mm.

[0019] In one embodiment, a sound guide tube is further included. A connecting plate is provided at one end of the sound guide tube. The connecting plate is respectively connected to the first shell, the second shell and the third shell. The inner cavity of the sound guide tube is connected to the sound outlet.

[0020] The beneficial effects of this application are:

[0021] 1. This application eliminates the magnet frame and uses the outer shell for magnetic conduction. The reed is reshaped into a flat plate, and the spaces between the first, second, and third shells are connected through various through-holes. Furthermore, the two diaphragms share a single sound cavity, and the layout of the internal components is rationally planned. This effectively reduces the overall thickness of the dual-unit receiver. The overall thickness of the structure of this application can be less than or equal to 2.5 mm.

[0022] 2. The coil of this application is flat, with one side of the coil flush with the inner wall of the adjacent housing, which helps reduce the overall thickness of the device. Simultaneously, this application uses an FPC flexible circuit board. The positive and negative poles of the coil are connected to the FPC flexible circuit board, which is located inside the housing and is in contact with the other side of the coil. The FPC flexible circuit board is provided with a positive lead portion and a negative lead portion, which are respectively connected to a PCB board located outside the corresponding housing. This fully utilizes the limited space, reducing the overall thickness while ensuring that the positive and negative poles of the coil are connected to the external PCB board.

[0023] 3. The second shell of the present application can serve as a fixing frame for the two diaphragms and can also form a sound cavity, which is convenient for fixing the diaphragms. This structure is also convenient for production and assembly.

[0024] 4. The two diaphragms of the present application are installed in the same shell and share a sound cavity, which can reduce the overall thickness and squeeze the air output at the same time, which will make the sound pressure level output higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the dual-unit receiver of the present application from a first perspective.

[0026] Figure 2 Schematic diagram of the second perspective of the dual-unit receiver of this application

[0027] Figure 3 This is a schematic diagram of the internal structure of the dual-unit receiver of the present application.

[0028] Figure 4 This is a schematic diagram of the arrangement of the first reed, the first guide needle, the first diaphragm, and the second reed, the second guide needle, and the second diaphragm of the dual-unit receiver of the present application.

[0029] Figure 5 This is a schematic diagram of simultaneously generating N poles in the first reed and the second reed of the dual-unit receiver of the present application.

[0030] Figure 6 This is a schematic diagram of the simultaneous generation of S poles in the first and second reeds of the dual-unit receiver of the present application.

[0031] Figure 7 This is an exploded view of the first housing of the dual-unit receiver of the present application.

[0032] Figure 8 This is an exploded view of the second housing of the dual-unit receiver of the present application.

[0033] Figure 9 This is an exploded view of the third housing of the dual-unit receiver of the present application.

[0034] Figure 10 This is a schematic structural diagram of the first reed of this application.

[0035] in:

[0036] 101, first housing; 102, second housing; 103, third housing; 104, first magnet; 105, second magnet; 106, first reed; 107, first coil; 108, first guide pin; 109, first FPC board; 110, first PCB board; 1021, sound cavity; 1022, sound hole; 111, first diaphragm; 112, second diaphragm; 113, third magnet; 114, fourth magnet; 115, second guide pin. 116. Second reed; 117. Second FPC board; 118. Second coil; 119. Second PCB board; 120. Sound guide tube; 121. Connecting plate; 1011. Upper half shell; 1012. Lower half shell; 1013. First type of through hole; 1023. Half shell; 1024. Second type of through hole; 1031. Upper half shell; 1032. Lower half shell; 1033. Third type of through hole; 1061. Main body; 1062. Extension arm; 1063. Middle section. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 4 As shown, an embodiment of the present application provides a dual-unit receiver, which includes a first shell 101, a second shell 102 and a third shell 103 arranged in sequence, the shells are bonded to each other, and a first coil 107, a first magnet block 104, a second magnet block 105 and a first reed 106 are arranged in the first shell 101. Figure 10As shown, the first reed 106 is a flat reed, and the first reed 106 includes a main body 1061 and a connecting portion. The main body 1061 of the first reed 106 is in a flat plate shape. The connecting portion of the first reed 106 is connected to the first shell 101. The first coil 107 is sheathed at one end of the main body of the first reed 106. The first magnet block 104 and the second magnet block 105 are respectively arranged on both sides of the other end of the main body of the first reed 106 and the first magnet block 104 is bonded to the inner wall of the adjacent first shell 101. The second magnet block 105 is bonded to the inner wall of the adjacent first shell 101. The material of the first shell 101 is a magnetic conductive material, and the second shell The inner cavity of the body 102 forms a sound cavity 1021, and the first diaphragm 111 and the second diaphragm 112 are arranged in the second shell 102 at intervals. A sound hole 1022 is provided at one end of the second shell 102. The third shell 103 is provided with a second coil 118, a third magnet block 113, a fourth magnet block 114 and a second reed 116. The second reed 116 is a flat reed. The second reed 116 includes a main body and a connecting part. The main body of the second reed 116 is in the shape of a flat plate. The connecting part of the second reed 116 is connected to the third shell 103. The second coil 118 is sheathed at one end of the main body of the second reed 116. The third magnet block 113, the fourth magnet block 114 and the second reed 116 are provided. 3 and the fourth magnet block 114 are respectively arranged on both sides of the other end of the main body of the second reed 116 and the third magnet block 113 is bonded to the inner wall of the adjacent third shell, the fourth magnet block 114 is bonded to the inner wall of the adjacent third shell 103, the third shell 103 is made of magnetic conductive material, and the two ends of the second shell 102 are respectively provided with second-type through holes 1024, the first shell 101 is provided with a first-type through hole 1013 at one end close to the second shell 102, and the first-type through hole 1013 is connected to the adjacent second-type through hole 1024, and the third shell 103 is provided with a third-type through hole 1033 at one end close to the second shell 102. 033 is connected to the adjacent second-type through hole 1024, and also includes a first guide needle 108 and a second guide needle 115. The first guide needle 108 is located between the second magnet and the first coil 107, one end of the first guide needle 108 is connected to the first reed 106, and the other end of the first guide needle 108 passes through the first-type through hole 1013 and the second-type through hole 1024 and is connected to the first diaphragm 111, and the second guide needle 115 is located between the third magnet and the second coil 118, one end of the second guide needle 115 is connected to the second reed 116, and the other end of the second guide needle 115 passes through the third-type through hole 1033 and the second-type through hole 1024 and is connected to the second diaphragm 112.

[0039] Specifically, the vibration of the first reed 106 drives the corresponding first diaphragm 111 to vibrate via the first guide pin 108, while the vibration of the second reed 116 drives the corresponding second diaphragm 112 to vibrate via the second guide pin 115. The vibration direction of the first diaphragm 111 is opposite to the vibration direction of the second diaphragm 112. The movement of the first diaphragm 111 and the second diaphragm 112 generates sound pressure.

[0040] It should be noted that, since they share a sound cavity 1021, the first diaphragm 111 and the second diaphragm 112 need to maintain relative motion when they move. The first diaphragm 111 and the second diaphragm 112 squeeze out the relative space of the sound cavity 1021 at the same time, or the first diaphragm 111 and the second diaphragm 112 move away from each other to increase the relative space of the sound cavity 1021. This can form a change in the air pressure of the sound cavity 1021 to output sound pressure. This kind of movement is generally achieved through the cooperation of the reed and the magnet block. Figure 5 and Figure 6 As shown, if the AC magnetic field generated by the coils on the two reeds simultaneously generates an N pole in the first reed 106 and the second reed 116, this will drive the first diaphragm 111 and the second diaphragm 112 to move toward the center. Conversely, if the AC magnetic field causes the first reed 106 and the second reed 116 to generate an S pole, both the first diaphragm 111 and the second diaphragm 112 will move outward. Similarly, if the first reed 106 generates an N pole when the second reed 116 generates an S pole, the corresponding magnet blocks of the upper and lower units need to be set in opposite directions. This will still achieve the above-mentioned movement of the first diaphragm 111 and the second diaphragm 112.

[0041] In one embodiment, Figures 7 to 9 As shown, the opening area of ​​the second type of through-holes 1024 is larger than the opening area of ​​the first type of through-holes 1013, the opening area of ​​the second type of through-holes 1024 is larger than the opening area of ​​the third type of through-holes 1033, and the second type of through-holes 1024 extend from one end of the second shell 102 to the other end of the second shell 102. The second shell 102 can be composed of two half shells 1023.

[0042] With the above arrangement, the second type of through holes 1024 can leave installation space and vibration space for the diaphragm. On the other hand, it effectively utilizes the limited space and helps to reduce the overall thickness.

[0043] In one embodiment, Figure 10As shown, the connecting portion of the first reed 106 is located outside the main body 1061 and has two extending arms 1062 and a middle section 1063 located between the two extending arms 1062. A gap is provided between the extending arms 1062 and the main body 1061, and the middle section 1063 is connected to the rear end of the main body 1061. The shape of the second reed 116 is the same as that of the first reed 106. This shape of the reed is convenient for fixing by the housing and also saves space.

[0044] In one embodiment, Figure 7 and Figure 9 As shown, the first shell 101 and the third shell 103 have the same structure. The first shell 101 includes an upper half shell 1011 and a lower half shell 1012. The connecting portion of the first reed 106 is clamped between the upper half shell 1011 and the lower half shell 1012 of the first shell 101, and the connecting portion of the second reed 116 is clamped between the upper half shell 1031 and the lower half shell 1032 of the third shell 103.

[0045] In one embodiment, one side of the first coil 107 is bonded to the first shell 101, and the positive and negative electrodes of the first coil 107 are connected to a first FPC board 109 (flexible printed circuit board) arranged in the first shell 101 and bonded to the other side of the first coil 107. The first FPC board 109 is provided with a positive lead-out portion and a negative lead-out portion, and the positive lead-out portion and the negative lead-out portion are respectively connected to a first PCB board 110 arranged on the outside of the first shell 101; one side of the second coil 118 is bonded to the third shell 103, and the positive and negative electrodes of the second coil 118 are connected to a second FPC board 117 arranged in the third shell 103 and bonded to the other side of the second coil 118. The second FPC board 117 is provided with a positive lead-out portion and a negative lead-out portion, and the positive lead-out portion and the negative lead-out portion are respectively connected to a second PCB board 119 arranged on the outside of the third shell 103.

[0046] In one embodiment, the first shell 101 is made of an iron-nickel alloy, and the second shell 102 is made of an iron-nickel alloy. For example, the iron-nickel alloy may be an iron-nickel alloy magnetic material with 49% nickel by weight.

[0047] In one embodiment, the outer edge of the first diaphragm 111 is bonded to the second housing 102 , and the outer edge of the second diaphragm 112 is bonded to the second housing 102 .

[0048] In one embodiment, a first support portion is provided on the first housing 101, located on one side of the first through-hole 1013, for bonding with the second magnet. A third support portion is provided on the third housing 103, located on one side of the third through-hole 1033, for bonding with the third magnet. This structure facilitates securing the magnet block while fully utilizing space for mounting other components.

[0049] In one embodiment, the overall thickness of the first housing 101 , the second housing 102 , and the third housing 103 is less than or equal to 2.5 mm.

[0050] In one embodiment, a sound guide tube 120 is further included. A connecting plate 121 is provided at one end of the sound guide tube 120. The connecting plate 121 is respectively connected to the first shell 101, the second shell 102 and the third shell 103. The inner cavity of the sound guide tube 120 is connected to the sound outlet 1022.

[0051] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A dual-unit receiver, characterized in that: The invention comprises a first shell, a second shell and a third shell arranged in sequence, wherein a first coil, a first magnet block, a second magnet block and a first reed are arranged in the first shell, the first reed is a flat reed, the first reed includes a main body and a connecting portion, the connecting portion of the first reed is connected to the first shell, the first coil is sheathed at one end of the main body of the first reed, the first magnet block and the second magnet block are respectively arranged on both sides of the other end of the main body of the first reed, and the first magnet block is bonded to the inner wall of the adjacent first shell, and the second magnet block is bonded to the inner wall of the adjacent first shell, and the material of the first shell is a magnetic conductive material. The inner cavity of the second shell forms a sound cavity, the first diaphragm and the second diaphragm are arranged in the second shell at intervals, and a sound hole is provided at one end of the second shell. A second coil, a third magnet block, a fourth magnet block and a second reed are arranged in the third shell. The second reed is a flat reed. The second reed includes a main body and a connecting portion. The connecting portion of the second reed is connected to the third shell. The second coil is jacketed around one end of the main body of the second reed. The third magnet block and the fourth magnet block are respectively arranged on both sides of the other end of the main body of the second reed. The third magnet block is bonded to the inner wall of the adjacent third shell. The fourth magnet block is bonded to the inner wall of the adjacent third shell. The material of the third shell is a magnetic conductive material. The second shell is respectively provided with second-type through holes at both ends, the first shell is provided with a first-type through hole at one end close to the second shell, and the first-type through hole is connected to the adjacent second-type through hole, the third shell is provided with a third-type through hole at one end close to the second shell, and the third-type through hole is connected to the adjacent second-type through hole, and also includes a first guide pin and a second guide pin, the first guide pin is located between the second magnet and the first coil, one end of the first guide pin is connected to the first reed, the other end of the first guide pin passes through the first and second-type through holes and is connected to the first diaphragm, the second guide pin is located between the third magnet and the second coil, one end of the second guide pin is connected to the second reed, the other end of the second guide pin passes through the third and second-type through holes and is connected to the second diaphragm.

2. The dual-unit receiver according to claim 1, wherein: The opening area of ​​the second type of through holes is larger than that of the first type of through holes, the opening area of ​​the second type of through holes is larger than that of the third type of through holes, and the second type of through holes extends from one end of the second shell to the other end of the second shell.

3. The dual-unit receiver according to claim 1, wherein The first shell and the third shell have the same structure. The first shell includes an upper half shell and a lower half shell. The connecting portion of the first reed is clamped between the upper half shell and the lower half shell of the first shell. The connecting portion of the second reed is clamped between the upper half shell and the lower half shell of the third shell.

4. The dual-unit receiver according to claim 1, wherein: One side of the first coil is attached to the first housing, and the positive and negative electrodes of the first coil are connected to a first FPC board disposed within the first housing and attached to the other side of the first coil. The first FPC board is provided with a positive lead portion and a negative lead portion, and the positive lead portion and the negative lead portion are respectively connected to a first PCB board disposed outside the first housing; One side of the second coil is bonded to the third shell, and the positive and negative poles of the second coil are connected to a second FPC board arranged in the third shell and bonded to the other side of the second coil. The second FPC board is provided with a positive lead-out portion and a negative lead-out portion, and the positive lead-out portion and the negative lead-out portion are respectively connected to a second PCB board arranged on the outside of the third shell.

5. The dual-unit receiver according to claim 1, wherein: The material of the first shell is an iron-nickel alloy, and the material of the second shell is an iron-nickel alloy.

6. The dual-unit receiver according to claim 1, wherein: The connecting portion of the first reed is located outside the main body, and has two extending arms. A gap is provided between the extending arms and the main body. The shape of the second reed is the same as that of the first reed.

7. The dual-unit receiver according to claim 1, wherein: The outer edge of the first diaphragm is connected to the second shell, and the outer edge of the second diaphragm is connected to the second shell.

8. The dual-unit receiver according to claim 1, wherein A first support portion is provided on the first shell at one side of the first type of through hole, and the first support portion is used to connect with the second magnet. A third support portion is provided on the third shell at one side of the third type of through hole, and the third support portion is used to connect with the third magnet.

9. The dual-unit receiver according to claim 1, wherein: The overall thickness of the first shell, the second shell and the third shell is less than or equal to 2.5 mm.

10. The dual-unit receiver according to claim 1, wherein It also includes a sound guide tube, one end of which is provided with a connecting plate, which is respectively connected to the first shell, the second shell and the third shell, and the inner cavity of the sound guide tube is connected to the sound outlet.

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