Tool-free assembling structure of recording pen and recording pen

Abstract

The invention relates to a tool-free assembling structure of a recording pen and the recording pen, the assembling structure is used for connecting a surface shell and a bottom shell of the recording pen, fixing a mainboard in the recording pen and fixing a signal transmission device of the recording pen, and the assembling structure comprises a groove body which is arranged on the surface, far away from the side matched with the surface shell, of the bottom shell, the groove body comprises a first matching groove and a second matching groove, the first matching groove is located in a penetrating structure in the middle of the bottom shell and used for being matched with a power device in the recording pen, and the second matching groove is located outside the first matching groove; the connecting plate is arranged at one end of the first matching groove and abuts against one end of the power supply device, so that the other end of the power supply device clings to the wall surface of the end part, far away from the connecting plate side, of the first matching groove; the cover plate is arranged in the groove body on the outer side of the first matching groove; the positioning pieces are distributed on the inner walls of the edges of the face shell and the bottom shell and the inner wall of the bottom shell on the outer side of the first matching groove, and the assembling structure can achieve tool-free assembling of the recording pen.

Description

Technical Field

[0001] The present invention relates to the technical field of recording pens, and specifically to a tool-free assembly structure for a recording pen and a recording pen. Background Art

[0002] With the development of artificial intelligence and speech recognition technologies, electronic products based on speech processing technologies have gradually been widely applied in life, and recording pens are one of them.

[0003] Among the current recording pens on the market, most use shaft-like connecting components similar to screws to connect the various components of the recording pen. Although the components of the recording pen can be stably connected, during the assembly process, workers need to use tools to install the connecting components into two or more components of the recording pen. When a large number of connecting components are used in the recording pen to achieve tight connection between the components of the recording pen, workers need to spend a long time to complete the assembly of the recording pen. The assembly operation has many steps, which is not conducive to improving the production efficiency of the recording pen; moreover, the structure of using tools to connect shaft-like connecting components similar to screws into the recording pen to achieve the assembly of the recording pen makes it basically impossible to disassemble the recording pen without carrying tools when a malfunction occurs during the use of the recording pen, causing inconvenience to the development of the maintenance operation of the recording pen. Summary of the Invention

[0004] Aiming at the technical defects in the background art, the present invention proposes a tool-free assembly structure for a recording pen and a recording pen, which solves the above technical problems and meets the actual needs. The specific technical solutions are as follows: The present invention discloses a tool-free assembly structure for a recording pen. This assembly structure is used for the connection between the front shell and the bottom shell of the recording pen, the fixation of the main board inside the recording pen, and the fixation of the signal transmission device of the recording pen. This assembly structure includes: A groove body, provided on the surface of the bottom shell away from the side that cooperates with the front shell. The groove body includes a first fitting groove and a second fitting groove. The first fitting groove is a through structure located in the middle of the bottom shell and is used to cooperate with the power supply device in the recording pen. The second fitting groove is located outside the first fitting groove; A connecting plate, provided at one end of the first fitting groove and abutting against one end of the power supply device, so that the other end of the power supply device closely adheres to the end wall surface of the first fitting groove away from the connecting plate side; A cover plate, provided in the second fitting groove; Positioning members, distributed on the inner walls of the edges of both the front shell and the bottom shell and on the inner wall of the bottom shell outside the first fitting groove; After the front shell and the bottom shell are fixedly connected through the positioning member, the cover plate is fitted into the second fitting groove, so that the cover plate abuts against one end surface of the power supply device parallel to the first fitting groove, and the front shell abuts against the other end surface of the power supply device parallel to the first fitting groove. Clamping portions are provided on both sides of the inner surface of the cover plate. The clamping portions are clamped to the ends of the connecting plate close to the power supply device side and inserted into the first fitting groove perpendicular to the first fitting groove to fill the space of the first fitting groove outside both sides of the power supply device, so as to position the power supply device.

[0005] As a further embodiment of the present invention, the end of the connecting plate away from the power supply device side is a butting portion with a stepped cross-sectional shape. The butting portion is on the end wall surface of the first fitting groove that is squeezed and fitted after the power supply device is assembled into the first fitting groove, and a part of the butting portion extends outside the first fitting groove. A guiding inclined surface is provided at the end of the connecting plate close to the power supply device side. The inclination direction of the guiding inclined surface gradually inclines towards the outside of the bottom shell as the distance from the butting portion increases. The clamping portion is clamped to the guiding inclined surface, and the positioning members are also distributed on the butting portion.

[0006] As a further embodiment of the present invention, another side wall surface of the same end of the connecting plate as the guiding inclined surface is provided with a first bevel angle. The first bevel angle is provided on both the left and right sides of the connecting plate. A notch is provided at the end of the clamping portion. The wall surface of the clamping portion outside the notch is provided with a second bevel angle whose inclination direction is opposite to that of the first bevel angle. The clamping portion slides on the first bevel angle to the notch and is clamped to the end wall surface of the connecting plate close to the guiding inclined surface, and the second bevel angle abuts against the guiding inclined surface.

[0007] As a further embodiment of the present invention, the positioning member includes a first positioning post. An extension section extending away from the power supply device is provided on one side of the butting portion. The first positioning post is arranged at the end of the extension section and is used for cooperating with a first fitting hole provided on the main board.

[0008] As a further embodiment of the present invention, the butting portion is located outside a memory interface provided on the main board for inserting a memory card. The butting portion, the extension section, and the first positioning post are all on the moving path of the memory card when it exits from the memory interface, and form a semi-surrounding structure outside the memory card.

[0009] As a further embodiment of the present invention, the positioning member further includes second positioning posts arranged on both sides of the inner wall of the bottom shell. Second fitting holes for cooperating with the second positioning posts are provided on both sides of the main board.

[0010] As a further embodiment of the present invention, the positioning member further includes a clamping block and a convex block with a wedge-shaped cross-section. At one end of the front shell, a plurality of clamping blocks perpendicular to the distribution direction of the edge of the front shell are arranged in a semi-surrounding distribution. A third bevel is provided at the end of the clamping block away from the edge of the front shell. A first groove is provided on the outer wall surface of the clamping block located outside the third bevel. At one end of the bottom shell, a plurality of mounting slots are arranged in the inner wall in a semi-surrounding distribution. The mounting slots extend along a direction perpendicular to the distribution direction of the edge of the bottom shell. The convex block is arranged on the inner wall of the bottom shell in the mounting slot. A third mating groove is provided in a circle on the inner wall of the edge of the bottom shell. After the clamping block is inserted into the mounting slot, the convex block is fitted into the first groove, and the edge of the front shell is fitted into the third mating groove, the front shell and the bottom shell are connected as a whole.

[0011] As a further embodiment of the present invention, the groove body further includes fourth mating grooves located outside both sides of the first mating groove and extending away from the second mating groove. The cross-section of the fourth mating groove is arc-shaped. A paste block is provided in the fourth mating groove. The end of the fourth mating groove away from the second mating groove is closed by the wall surface of the bottom shell, and the end of the fourth mating groove on the side not closed by the wall surface of the bottom shell is an opening. The end of the paste block at the opening is bonded to the surface of the main board after the front shell and the bottom shell are connected as a whole.

[0012] As a further embodiment of the present invention, the groove body further includes a fifth mating groove located outside one side of the first mating groove. The signal transmission device is arranged in the fifth mating groove. The opening of the fifth mating groove is at the end close to the second mating groove.

[0013] The present invention also discloses a recording pen, which includes a front shell, a bottom shell, a main board, a signal transmission device and the above-mentioned assembly structure, and further includes a sound receiving channel. The sound receiving channel is arranged on the inner walls on both sides of one end of the bottom shell. The sound receiving channel is composed of a semi-surrounding convex edge connecting both ends of the edge of the bottom shell. The edge of the bottom shell connecting both ends of the convex edge is communicated with a through hole outside the recording pen. The main board is connected with a microphone with an EVA foam sleeve outside. The end of the sound receiving channel away from the edge of the bottom shell is a sixth mating groove for fitting the EVA foam. The middle section of the sound receiving channel bends and extends outward to one side of the sixth mating groove and abuts against the surface of the main board after the front shell and the bottom shell are connected as a whole.

[0014] The beneficial effects of the present invention are as follows: The assembly structure for the voice recorder assembly provides a position for placing the power supply device through the groove provided on the bottom shell. Then, the power supply device in the groove is positioned by installing the connecting plate and the cover plate. Further, the position of the main board and the components on the main board is fixed by the positioning member, and the power supply device is further positioned. At the same time, the connection between the front shell and the bottom shell can also be realized. The assembly process of the voice recorder is simple, and no tools are required for the assembly of the voice recorder, which shortens the assembly time of the voice recorder and is conducive to improving the production efficiency of the voice recorder. Moreover, the structure of the voice recorder is simple, and the connection tightness between the internal components is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of the assembly structure Figure 1 .

[0016] Figure 2 FIG. is a schematic structural diagram of the assembly structure Figure 2 .

[0017] Figure 3 FIG. is a schematic structural diagram of the connecting plate.

[0018] Figure 4 FIG. is a schematic structural diagram of the cover plate.

[0019] Figure 5 FIG. is a schematic structural diagram of the connecting plate fitted in the first fitting groove.

[0020] Figure 6 FIG. is a schematic structural diagram of a semi-surrounding structure formed on the outer side of the memory card.

[0021] Figure 7 FIG. is a schematic structural diagram of the clamping block inserted into the insertion slot.

[0022] Figure 8 FIG. is a schematic structural diagram of the bottom shell.

[0023] Figure 9 FIG. is a schematic structural diagram of the microphone located in the sound collection channel.

[0024] Figure 10 FIG. is a schematic external structural diagram of the voice recorder.

[0025] In the figure, 1 is the front shell; 2 is the bottom shell; 21 is the groove body; 211 is the first mating groove; 212 is the second mating groove; 213 is the fourth mating groove; 214 is the fifth mating groove; 22 is the second positioning post; 23 is the insertion slot; 231 is the opening; 24 is the third mating groove; 25 is the through hole; 3 is the main board; 31 is the first mating hole; 32 is the second mating hole; 4 is the signal transmission device; 5 is the power supply device; 6 is the connecting plate; 61 is the abutting portion; 611 is the extension section; 62 is the guiding inclined surface; 63 is the first bevel angle; 7 is the cover plate; 71 is the clamping portion; 711 is the notch; 712 is the second bevel angle; 8 is the positioning member; 81 is the first positioning post; 82 is the clamping block; 821 is the third bevel angle; 822 is the first groove; 83 is the convex block; 9 is the memory card; 10 is the memory interface; 11 is the sticking block; 12 is the sound receiving channel; 121 is the convex edge; 122 is the sixth mating groove; 13 is the EVA foam; 14 is the microphone. Detailed implementation mode

[0026] The present invention discloses a tool-free assembly structure for a recording pen. As shown in Figure 1 and Figure 2 in combination, this assembly structure is used for the connection of the front shell 1 and the bottom shell 2 of the recording pen, the fixation of the main board 3 inside the recording pen, and the fixation of the signal transmission device 4 of the recording pen. This assembly structure includes: The groove body 21 is arranged on the surface of the bottom shell 2 away from the side that cooperates with the front shell 1. The groove body 21 includes a first mating groove 211 and a second mating groove 212. The first mating groove 211 is a through structure in the middle of the bottom shell 2 and is used for mating with the power supply device 5 in the recording pen. The second mating groove 212 is located outside the first mating groove 211. The connecting plate 6 is arranged at one end of the first mating groove 211 and abuts against one end of the power supply device 5, so that the other end of the power supply device 5 closely adheres to the end wall surface of the first mating groove 211 away from the connecting plate 6. The cover plate 7 is arranged in the second mating groove 212. The positioning members 8 are distributed on the inner walls of the edges of the front shell 1 and the bottom shell 2 and on the inner wall of the bottom shell 2 outside the first mating groove 211. Among them, after the front shell 1 and the bottom shell 2 are fixedly connected through the positioning members 8, the cover plate 7 is fitted in the second mating groove 212, so that the cover plate 7 abuts against one end face of the power supply device 5 parallel to the first mating groove 211. The front shell 1 abuts against the other end face of the power supply device 5 parallel to the first mating groove 211. Clamping portions 71 are arranged on both sides of the inner surface of the cover plate 7. The clamping portions 71 are clamped to the end of the connecting plate 6 close to the power supply device 5 and inserted into the first mating groove 211 perpendicular to it.

[0027] It should be noted that when assembling the voice recorder, first fit the cover plate 7 into the second fitting groove 212, and its clamping portion 71 is located in the first fitting groove 211. Then place the connecting plate 6 at the end of the second fitting groove 212 close to the main board 3. During the installation of the connecting plate 6, the clamping portion 71 abuts against the end portion on its side close to the power supply device 5, thereby forming the connection between the two. Then press the power supply device 5 into the first fitting groove 211 outside the connecting plate 6, and press it tightly against the end wall surface of the first fitting groove 211 away from the connecting plate 6 side. At the same time, the clamping portion 71 fills the space of the first fitting groove 211 outside both sides of the power supply device 5 to achieve the positioning of the power supply device 5 in the first fitting groove 211. Then, through the positioning member 8, the front shell 1 is assembled on the bottom shell 2. The cover plate 7 abuts against one end surface of the power supply device 5 parallel to the first fitting groove 211, and the front shell 1 abuts against the other end surface of the power supply device 5 parallel to the first fitting groove 211, thereby realizing the assembly of the power supply device 5. The position of the main board 3 is fixed by the setting of the positioning member 8.

[0028] The assembly structure for the voice recorder provides a position for the placement of the power supply device 5 through the groove 21 provided on the bottom shell 2. Then, the power supply device 5 in the groove 21 is positioned through the installation of the connecting plate 6 and the cover plate 7. The positioning member 8 is used to fix the positions of the main board 3 and the components on the main board 3, and further position the power supply device 5. At the same time, it can also realize the connection between the front shell 1 and the bottom shell 2. The assembly process of the voice recorder is simple, without the need to use tools for the assembly of the voice recorder, shortening the assembly time of the voice recorder, which is beneficial to improving the production efficiency of the voice recorder. Moreover, the structure of the voice recorder is simple, and the connection tightness between the internal components is high.

[0029] It should be further noted that, as Figures 3 - 5 As shown in combination, the end portion of the connecting plate 6 away from the power supply device 5 is a butting portion 61 with a stepped cross-sectional shape. The butting portion 61 is pressed and fitted on the end wall surface of the first fitting groove 211 after the power supply device 5 is assembled into the first fitting groove 211, and a part of the butting portion 61 extends outside the first fitting groove 211. The end portion of the connecting plate 6 close to the power supply device 5 is provided with a guiding inclined surface 62. The inclination direction of the guiding inclined surface 62 is inclined gradually towards the outside of the bottom shell 2 as the distance from the butting portion 61 increases. The clamping portion 71 is clamped on the guiding inclined surface 62, and the positioning members 8 are also distributed on the butting portion 61.

[0030] After the power supply device 5 is inserted into the first fitting groove 211, the two wall surfaces of the abutting portion 61 having a stepped structure of the power supply device 5 will be pressed against the end wall surface of the first fitting groove 211, thereby fixing the position of the connecting plate 6; and during the process of inserting the power supply device 5 into the first fitting groove 211, the power supply device 5 can be guided by the guiding inclined surface 62, so that the power supply device 5 can more easily enter the first fitting groove 211.

[0031] Specifically, as Figures 3 - 5 shown in combination, another side wall surface in the same end portion of the connecting plate 6 as the guiding inclined surface 62 is provided with a first bevel angle 63. The first bevel angle 63 is provided on both the left and right sides of the connecting plate 6. The end portion of the engaging portion 71 is provided with a notch 711. The wall surface of the engaging portion 71 outside the notch 711 is provided with a second bevel angle 712 whose inclined direction is opposite to the inclined direction of the first bevel angle 63. When the first bevel angle 63 slides to the notch 711 and is engaged with the end wall surface of the connecting plate 6 close to the guiding inclined surface 62, the second bevel angle 712 abuts against the guiding inclined surface 62.

[0032] Among them, when the connecting plate 6 is inserted into the first fitting groove 211, the end portion of the engaging portion 71 close to the notch 711 slides on the first bevel angle 63, and finally the notch 711 is engaged with the end wall surface of the connecting plate 6 close to the guiding inclined surface 62. After pressing the abutting portion 61 of the connecting plate 6 into the end portion of the first fitting groove 211, the position of the connecting plate 6 is fixed and a tight connection is formed with the cover plate 7.

[0033] Specifically, as Figure 3 and Figure 5 shown in combination, the positioning member 8 includes a first positioning post 81. One side of the abutting portion 61 is provided with an extension section 611 extending away from the power supply device 5. The first positioning post 81 is arranged at the end of the extension section 611 and is used for cooperating with the first fitting hole 31 provided on the main board 3.

[0034] Among them, after the position of the connecting plate 6 on the bottom case 2 is fixed and the front case 1 and the bottom case 2 are both connected, the main board 3 can be installed on the extension section 611 along the direction in which the first fitting hole 31 cooperates with the first positioning post 81, so that the main board 3 is connected into the bottom case 2, and the position of the main board 3 can be preliminarily fixed without using tools and connecting components.

[0035] More specifically, as Figure 6 shown, the abutting portion 61 is located outside the memory interface 10 provided on the main board 3 for inserting the memory card 9. The abutting portion 61, the extension section 611 and the first positioning post 81 are all located on the moving path of the memory card 9 exiting from the memory interface 10 and form a semi-surrounding structure outside the memory card 9.

[0036] Among them, the semi - enclosed structure formed by the abutting portion 61, the extension section 611, and the first positioning post 81 can limit the position of the memory card 9 after the voice recorder is assembled, thereby preventing the memory card 9 inserted at the memory interface 10 from loosening, so as to ensure that the memory card 9 can normally store audio data.

[0037] More specifically, as Figure 1 and Figure 8 shown in combination, the positioning member 8 further includes second positioning posts 22 provided on both sides of the inner wall of the bottom case 2, and second mating holes 32 are provided on both sides of the main board 3 to cooperate with the second positioning posts 22.

[0038] Among them, through the setting of the second positioning posts 22, when installing the main board 3 onto the bottom case 2, the position of the main board 3 is further stabilized through the cooperation of the second mating holes 32 and the second positioning posts 22, so that the position of the main board 3 after being connected to the bottom case 2 is better maintained.

[0039] More specifically, as Figure 1 、 Figure 2 and Figure 7 shown in combination, the positioning member 8 further includes a clamping block 82 and a convex block 83 with a wedge - shaped cross - section. A plurality of clamping blocks 82 extending perpendicular to the edge distribution direction of the front case 1 are provided at the edge of one end of the front case 1 in a semi - enclosed distribution. A third bevel 821 is provided at the end of the clamping block 82 away from the edge of the front case 1. A first groove 822 is provided on the outer wall surface of the clamping block 82 outside the third bevel 821. A plurality of installation slots 23 are provided on the inner wall of the edge of one end of the bottom case 2 in a semi - enclosed distribution. The installation slots 23 extend along a direction perpendicular to the edge distribution direction of the bottom case 2. The convex block 83 is provided on the inner wall of the bottom case 2 within the installation slots 23. A circle of third mating grooves 24 is provided on the inner wall of the edge of the bottom case 2. After the clamping block 82 is inserted into the installation slot 23, the convex block 83 is fitted into the first groove 822, and the edge of the front case 1 is fitted into the third mating groove 24, the front case 1 and the bottom case 2 are connected as a whole.

[0040] During the process of the cooperation between the front case 1 and the bottom case 2, the front case 1 is installed onto the bottom case 2 along the direction of the cooperation between the clamping block 82 and the installation slot 23. The setting of the third bevel 821 can guide the clamping block 82 when the clamping block 82 contacts the edge of the bottom case 2, so that the clamping block 82 is slightly bent to enter the installation slot 23. The clamping block 82 moves within the installation slot 23 until the convex block 83 is clamped into the first groove 822. At this time, the edge of the front case 1 is fitted into the third mating groove 24, and the front case 1 and the bottom case 2 are tightly connected. The operation is simple, and no tools or connecting components are required to connect the front case 1 and the bottom case 2.

[0041] It should be further noted that, as Figure 2 and Figure 8 shown in combination, the groove body 21 further includes a fourth fitting groove 213 located outside both sides of the first fitting groove 211 and extending away from the second fitting groove 212. The cross-sectional shape of the fourth fitting groove 213 is arc-shaped. A paste block 11 is provided in the fourth fitting groove 213. The end of the fourth fitting groove 213 on the side away from the second fitting groove 212 is closed by the wall surface of the bottom case 2, and the end of the fourth fitting groove 213 on the side not closed by the wall surface of the bottom case 2 is an opening 231. The end of the paste block 11 at the opening 231 is bonded to the surface of the main board 3 after the face case 1 and the bottom case 2 are connected as a whole.

[0042] Among them, through the paste block 11 in the fourth fitting groove 213, after the voice recorder is assembled, the end face of the paste block 11 away from the side closed by the wall surface of the bottom case 2 can be adhered to the cover plate 7, thereby strengthening the stability of the cover plate 7 in the second fitting groove 212, and the paste block 11 on the side of the opening 231 will be adhered to the main board 3, thereby further fixing the position of the main board 3; in addition, the fourth fitting groove 213 is formed by the depression of the bottom case 2, and the depressed part of the bottom case 2 is located outside both sides of the first fitting groove 211, so it can play a role in limiting both sides of the power supply device 5, which is beneficial to maintaining the position of the power supply device 5.

[0043] It should be further noted that, as Figure 2 shown, the groove body 21 further includes a fifth fitting groove 214 located outside one side of the first fitting groove 211. The signal transmission device 4 is arranged in the fifth fitting groove 214, and the opening of the fifth fitting groove 214 is at the end close to the second fitting groove 212.

[0044] Among them, the fifth fitting groove 214 provides a position for the signal transmission device 4 to be connected to the bottom case 2, and after the cover plate 7 is fitted into the second fitting groove 212, the opening side of the fifth fitting groove 214 can be sealed, which can prevent foreign objects from entering the fifth fitting groove 214 and affecting the normal operation of the signal transmission device 4.

[0045] The present invention also discloses a voice recorder, as Figures 8 - 10As shown in combination, the voice recorder includes a front shell 1, a bottom shell 2, a main board 3, a signal transmission device 4 and the above-mentioned assembly structure, and further includes a sound receiving channel 12. The sound receiving channel 12 is arranged on the inner walls on both sides of one end of the bottom shell 2. The sound receiving channel 12 is composed of a semi-surrounding convex edge 121 connecting both ends along the edge of the bottom shell 2. The edge of the bottom shell 2 connecting both ends of the convex edge 121 is communicated with a through hole 25 outside the voice recorder. The main board 3 is connected with a microphone 14 with an EVA foam 13 sleeved on the outside. The end of the sound receiving channel 12 far from the edge of the bottom shell 2 is a sixth fitting groove 122 for fitting with the EVA foam 13. The middle section of the sound receiving channel 12 bends and extends outward to one side of the sixth fitting groove 122 and abuts against the surface of the main board 3 after the front shell 1 and the bottom shell 2 are connected into one body.

[0046] It should be noted that when the voice recorder is working, sound waves can enter the sound receiving channel 12 through the through hole 25 and then be conducted to the microphone 14 to be received. After the front shell 1 is assembled to the bottom shell 2, the sound receiving channel 12 will press on the main board 3, thereby further fixing the position of the main board 3. Moreover, the sixth fitting groove 122 will fit to the outside of the EVA foam 13, indirectly playing a role in positioning the components on the main board 3. In addition, the middle section of the sound receiving channel 12 that bends and extends outward to one side of the sixth fitting groove 122 can increase the contact area between the sound receiving channel 12 and the main board 3, which helps to maintain the position of the main board 3.

[0047] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tool-free assembly structure for a voice recorder, which is used for connecting the front shell and the bottom shell of the voice recorder, fixing the main board inside the voice recorder, and fixing the signal transmission device of the voice recorder. It is characterized in that, The assembly structure includes: A groove body is provided on the surface of the bottom shell away from the side that cooperates with the front shell. The groove body includes a first fitting groove and a second fitting groove. The first fitting groove is a through structure in the middle of the bottom shell and is used to cooperate with the power supply device in the recording pen. The second fitting groove is located outside the first fitting groove. A connecting plate is provided at one end of the first fitting groove and abuts against one end of the power supply device, so that the other end of the power supply device closely adheres to the end wall surface of the first fitting groove away from the connecting plate side. A cover plate is provided in the second fitting groove. Positioning members are distributed on the inner walls of the edges of both the front shell and the bottom shell and on the inner wall of the bottom shell outside the first fitting groove. Among them, after the front shell and the bottom shell are fixedly connected through the positioning members, the cover plate is fitted into the second fitting groove, so that the cover plate abuts against one end face of the power supply device parallel to the first fitting groove. The front shell abuts against the other end face of the power supply device parallel to the first fitting groove. At both sides of the inner surface of the cover plate, there are clamping portions. The clamping portions are clamped to the end of the connecting plate close to the power supply device side and inserted into the first fitting groove perpendicular to it, filling the space of the first fitting groove outside both sides of the power supply device to realize the positioning of the power supply device.

2. The assembly structure according to claim 1, wherein, The end of the connecting plate away from the power supply device side is a butting portion with a stepped cross-sectional shape. The butting portion is on the end wall surface of the first fitting groove that is squeezed and fitted after the power supply device is assembled into the first fitting groove, and a part of the butting portion extends outside the first fitting groove. The end of the connecting plate close to the power supply device side is provided with a guiding inclined surface. The inclination direction of the guiding inclined surface gradually inclines towards the outside of the bottom shell as the distance from the butting portion increases. The clamping portion is clamped to the guiding inclined surface, and the positioning members are also distributed on the butting portion.

3. The assembly structure according to claim 2, characterized in that, On the other side wall surface of the same end of the connecting plate as the guiding inclined surface, there is a first bevel angle, which is provided on both the left and right sides of the connecting plate. The end of the clamping portion is provided with a notch. The wall surface of the clamping portion outside the notch is provided with a second bevel angle with an inclination direction opposite to that of the first bevel angle. The clamping portion slides on the first bevel angle until the notch is clamped to the end wall surface of the connecting plate close to the guiding inclined surface, and the second bevel angle abuts against the guiding inclined surface.

4. The assembly structure according to claim 2, wherein, The positioning member includes a first positioning post. On one side of the butting portion, there is an extension section extending away from the power supply device direction. The first positioning post is arranged at the end of the extension section and is used to cooperate with the first fitting hole provided on the main board.

5. The assembly structure according to claim 4, characterized in that, The butting portion is located outside the memory interface provided on the main board for inserting the memory card. The butting portion, the extension section, and the first positioning post are all on the moving path of the memory card when it exits from the memory interface, and form a semi-surrounding structure outside the memory card.

6. The assembly structure according to claim 4, characterized in that, The positioning member further includes second positioning posts arranged on both sides of the inner wall of the bottom shell. On both sides of the main board, there are second fitting holes that cooperate with the second positioning posts.

7. The assembly structure according to claim 4, wherein The positioning member further includes a clamping block and a convex block with a wedge-shaped cross-section. A plurality of clamping blocks extending perpendicular to the distribution direction of the edge of the face shell are arranged at the edge of one end of the face shell in a semi-surrounding distribution. A third bevel is provided at the end of the clamping block away from the edge of the face shell. A first groove is provided on the outer wall surface of the clamping block located outside the third bevel. A plurality of mounting slots are arranged at the inner wall of the edge of one end of the bottom shell in a semi-surrounding distribution. The mounting slots extend in a direction perpendicular to the distribution direction of the edge of the bottom shell. The convex block is arranged on the inner wall of the bottom shell in the mounting slot. A third mating groove is provided in a circular shape on the inner wall of the edge of the bottom shell. After the clamping block is inserted into the mounting slot, the convex block is fitted into the first groove, and the edge of the face shell is fitted into the third mating groove, the face shell and the bottom shell are connected as a whole.

8. The assembly structure according to claim 1, characterized in that The groove body further includes a fourth mating groove located outside both sides of the first mating groove and extending away from the second mating groove. The cross-section of the fourth mating groove is arc-shaped. A sticking block is provided in the fourth mating groove. The end of the fourth mating groove away from the second mating groove is closed by the wall surface of the bottom shell, and the end of the fourth mating groove on the side not closed by the wall surface of the bottom shell is an opening. The end of the sticking block at the opening is bonded to the surface of the main board after the face shell and the bottom shell are connected as a whole.

9. The assembly structure according to claim 1, characterized in that, The groove body further includes a fifth mating groove located outside one side of the first mating groove. The signal transmission device is arranged in the fifth mating groove. The opening of the fifth mating groove is at the end close to the second mating groove.

10. A voice recorder, which comprises a front shell, a bottom shell, a main board, a signal transmission device, and the assembly structure according to any one of claims 1 to 9, characterized in that, It further includes a sound receiving channel. The sound receiving channel is arranged on the inner walls on both sides of one end of the bottom shell. The sound receiving channel is composed of a semi-surrounding convex edge connecting the two ends of the edge of the bottom shell. The edge of the bottom shell connecting the two ends of the convex edge is communicated with a through hole outside the recording pen. The main board is connected with a microphone with an EVA foam sleeve outside. The end of the sound receiving channel away from the edge of the bottom shell is a sixth mating groove for fitting the EVA foam. The middle section of the sound receiving channel bends and extends outward to one side of the sixth mating groove and abuts against the surface of the main board after the face shell and the bottom shell are connected as a whole.

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