An improved buzzer and its manufacturing process

Abstract

This invention relates to an improved buzzer and its manufacturing process. The improved buzzer includes pins, a base cover, and a coil assembly; the pins and the coil assembly are respectively disposed on the base cover; the beginning and / or end of the coil assembly are directly electrically connected to the corresponding pins. This buzzer has a simple and reasonable structure, which can simplify the production process and improve production efficiency.

Description

Technical Field

[0001] This invention relates to an electrical component, specifically an improved buzzer and its manufacturing process. Background Technology

[0002] Traditional buzzers, such as Figure 1 As shown, coil group 4 is electrically connected to pin 1 via PCB board 9. This structure makes the buzzer manufacturing process more complicated and has a certain impact on the operation of the buzzer. Specifically, the general production process is as follows: ① Rivet pin 1 to PCB board 9; ② ​​After completing the winding of coil group 4, solder the beginning and end of coil group 4 to the corresponding pads on PCB board 9, so that coil group 4 and pin 1 are electrically connected to each other; ③ Apply glue to PCB board and support coil 9 and wait for the glue to cure; ④ After the glue has cured for 3-4 hours, assemble the magnetic ring 6, vibrating plate 7 and outer shell 8 in sequence, then apply glue again to seal the edges and holes, cure, and then perform epoxy potting. In traditional buzzers, pin 1 and coil group 4 are electrically connected to each other via PCB board 9. This requires each pin 1 and coil group 4 to be soldered to PCB board 9, making the production process cumbersome. Furthermore, the quality of the soldering directly affects the connection. Additionally, the production process involves applying a circular layer of adhesive around the PCB board 9 (step ③ above; since the bonding object is the PCB board 9, only a special adhesive with a long curing time can be used). The next step cannot proceed until the adhesive is fully cured. Therefore, traditional buzzer production cannot achieve uninterrupted assembly line production, resulting in low efficiency. Moreover, the printed circuitry on PCB board 9 connects pin 1 and coil group 4, increasing the resistance between them and reducing the current reaching coil group 4, leading to power loss and energy consumption.

[0003] Given the aforementioned problems with existing buzzers, further improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an improved buzzer and its manufacturing process. This buzzer has a simple and reasonable structure, which can simplify the production process and improve production efficiency.

[0005] The objective of this invention is achieved as follows:

[0006] An improved buzzer includes pins, a base cover, and a coil assembly; the pins and the coil assembly are respectively disposed on the base cover; the beginning and / or end of the coil assembly are directly electrically connected to the corresponding pins.

[0007] The bottom cover is made of high-temperature resistant and high-strength materials, preferably made of bakelite.

[0008] The pins are inserted and fixed on the bottom cover; or, the bottom cover and the pins are integrally formed.

[0009] Depending on the wire diameter and tensile strength, the needle is provided with sharp edges or rounded corners to increase the winding friction, or the cross-section of the needle is circular; specifically, the cross-section of the needle with sharp edges or rounded corners is polygonal (e.g., triangle, rectangle, pentagon, hexagon, etc.).

[0010] A winding bracket is fixedly installed on the bottom cover, and a winding post is installed on the winding bracket. The coil group is wound on the winding post.

[0011] The bottom cover has a slot, through which the wires at the beginning and / or end of the coil group pass and are electrically connected to the pins.

[0012] The wires at the beginning and / or end of the coil assembly are connected to the corresponding pin strands; the surfaces of the pin and strand areas are covered with a tin layer by a tinning process.

[0013] This improved buzzer also includes a magnetic ring, a vibrating plate, and a housing; one end face of the magnetic ring is fitted with the end face of the bottom cover, and the other end face of the magnetic ring is fitted with the vibrating plate; the coil assembly is located inside the magnetic ring; the housing covers the bottom cover and / or the coil assembly and / or the magnetic ring and / or the vibrating plate.

[0014] The manufacturing process of the above-mentioned improved buzzer includes the following steps:

[0015] Step 1: Insert the pins into the bottom cover;

[0016] Step two: Apply adhesive to bond the bottom cover and the carrier for winding the coil assembly to form a whole;

[0017] Step 3: Place the components made in Step 2 into a winding machine for twisting and winding to form a coil assembly.

[0018] Step four: After the coil assembly is completed, perform a tinning process to form a tin layer on the pins and / or stranded wires.

[0019] Step 5: Assemble the magnetic ring, vibrating plate, and outer shell, and apply adhesive to seal the holes and / or pot the shell with epoxy.

[0020] Two pins 1 are provided; the process of twisting the wire first and then winding the wire is as follows: ① Connect the wire used to make the coil group to any pin with twisted wire; ② Wind the wire to make a coil group; ③ Connect the wire to the other pin 1 with twisted wire.

[0021] The beneficial effects of this invention are as follows:

[0022] Compared to traditional buzzers, this improved buzzer eliminates the need for a PCB board. The pins are directly electrically connected to the coil, eliminating the need for soldering and PCB potting, thus saving time and allowing for uninterrupted production line manufacturing and significantly improving production efficiency. Furthermore, the direct electrical connection between the pins and coil eliminates power loss and ensures reliable electrical connection. Additionally, the pins are threaded inside the base cover, ensuring they can withstand a destructive pulling force of 1.5-2.0 kg, guaranteeing a secure bond between the pins and the base cover even after wave soldering and reflow soldering. Moreover, the use of pins with sharp edges or rounded corners increases winding friction, resulting in a more stable wire fixation and easier wire breakage at the end of winding, making wire pulling easier. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of a traditional buzzer.

[0024] Figure 2 This is a cross-sectional view of a buzzer in one embodiment of the present invention.

[0025] Figure 3 This is an exploded view of a buzzer in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See Figures 1-3 The buzzer involved in this embodiment includes pins 1, a bottom cover 2, and a coil assembly 4. Pins 1 and coil assembly 4 are respectively disposed on the bottom cover 2. The beginning and end of the coil assembly 4 are respectively wound around pins 1 to directly connect to the corresponding pins 1. Compared with traditional buzzers, this improved buzzer eliminates the PCB board 9. Pins 1 and coil assembly 4 are directly electrically connected. This structure eliminates the related soldering process and eliminates the need to pot the PCB board 9 with glue, saving the process of waiting for the glue to cure. This enables the production of buzzers to achieve uninterrupted assembly line production, greatly improving the production efficiency of buzzers. In addition, the direct electrical connection between pins 1 and coil assembly 4 results in no power loss between them and ensures the electrical connection performance between them.

[0028] Furthermore, the bottom cover 2 is made of a high-temperature resistant and high-strength material that can withstand 400-500℃. In this embodiment, the bottom cover 2 is preferably made of bakelite material. The high-temperature resistant and high-strength bottom cover 2 can meet the production requirements of the buzzer.

[0029] Furthermore, in this embodiment, the pin 1 is inserted and fixed to the bottom cover 2; otherwise, the bottom cover 2 and the pin 1 can be integrally formed.

[0030] Furthermore, the edge of the pin 1 is provided with a ridge 101 to increase the winding friction. The cross-section of the pin 1 involved in this embodiment is square. After setting the ridge 101, the winding effect on the pin 1 is more stable, and the wire is easier to break when the winding ends, so that the pulling action is less strenuous.

[0031] Furthermore, based on the wire diameter and tensile strength, the edge of the needle 1 in this embodiment is provided with an edge 101 (or rounded corner) to increase the winding friction. The cross-section of the needle 1 with the edge 101 (or rounded corner) is specifically polygonal (e.g., triangle, rectangle, pentagon, hexagon, etc.), that is, an edge 101 (or rounded corner) is formed between any two adjacent planes. In this embodiment, a square (i.e., rectangle) is preferred. Of course, depending on product requirements, a traditional needle 1 with a circular cross-section can also be selected.

[0032] Furthermore, a winding bracket 3 is fixedly installed on the top end face of the bottom cover 2, and a winding post 5 extending vertically upward in the middle is provided on the winding bracket 3, and the coil group 4 is wound on the winding post 5; a recess 202 is processed on the top end face of the bottom cover 2, and the bottom of the winding bracket 3 is embedded in the recess 202.

[0033] Furthermore, the bottom cover 2 has a slot 201 on its side. The wires 401 at the beginning and end of the coil group 4 pass through the slot 201 and are electrically connected to the pin 1, so as to prevent the wires 401 from protruding from the side of the bottom cover 2 and affecting the subsequent assembly.

[0034] Furthermore, the wires 401 at the beginning and / or end of the coil group 4 are twisted together with the corresponding pins 1; the surfaces of the pins 1 and the twisted wire areas are covered with a tin layer by a tin-immersion process, so that the electrical connection between the coil group 4 and the pins 1 is more stable and reliable, and facilitates the later soldering of the buzzer.

[0035] Furthermore, this buzzer also includes a magnetic ring 6, a vibrating plate 7, and a housing 8; the bottom end face of the magnetic ring 6 is fitted with the end face of the bottom cover 2, and the top end face of the magnetic ring 6 is fitted with the vibrating plate 7; the coil group 4 is located inside the magnetic ring 6; the housing 8 is a cover with an open bottom end, and the bottom cover 2 is fitted into the bottom opening of the housing 8, so that the housing 8 covers the bottom cover 2, the winding bracket 3, the coil group 4, the winding post 5, the magnetic ring 6, and the vibrating plate 7, and the pin 1 is exposed at the bottom of the housing 8.

[0036] The manufacturing process of the above-mentioned improved buzzer includes the following steps:

[0037] Step 1: Insert the two pins 1 into the corresponding holes on the bottom cover 2 using the pin insertion device;

[0038] Step 2: Apply adhesive to bond the bottom cover 2 and the carrier for winding the coil assembly 4 to form a whole; specifically, the carrier here is the winding bracket 3, and the adhesive between the bottom cover 2 and the winding bracket 3 is a fast-curing adhesive. After the adhesive cures quickly, the pin 1, the bottom cover 2 and the winding bracket 3 form a whole.

[0039] Step 3: Place the components made in Step 2 into a winding machine for twisting and winding to form coil group 4.

[0040] Step four: After coil group 4 is completed, it is then dipped in tin to form a tin layer on pin 1 and stranded wire. The temperature of the tin bath is approximately 250-400℃. The bottom cover 2 is made of bakelite material that can withstand high temperatures of 400-500℃ and has high strength, so it meets the production requirements.

[0041] Step 5: Assemble the magnetic ring 6, the vibrating plate 7, and the outer shell 8, and apply adhesive to seal the bottom cover 2 and the outer shell 8 to plug the holes. After curing, perform epoxy potting.

[0042] Furthermore, the process of twisting the wire first and then winding it is as follows: ① Connect the wire 401 used to make coil group 4 to any pin 1 through twisting; ② Wind the wire 401 to make coil group 4; ③ Connect the wire 401 to another pin 1 through twisting.

[0043] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved buzzer, characterized in that: It includes pins (1), a bottom cover (2), and a coil assembly (4); the pins (1) and the coil assembly (4) are respectively disposed on the bottom cover (2); the beginning and / or end of the coil assembly (4) are directly electrically connected to the corresponding pins (1). The bottom cover (2) has a slot (201) on its side. The wires (401) at the beginning and end of the coil group (4) are connected to the corresponding pins (1) after passing through the slot (201). The surface of the pins (1) and the stranded area is covered with a tin layer. The slot (201) is located on the corresponding side between the bottom cover (2) and the outer shell (1). The outer shell (8) is a cover with an opening at the bottom. The bottom cover (2) is fitted into the opening at the bottom of the outer shell (8), so that the outer shell (8) covers the bottom cover (2) and the coil assembly (4), and the pins (1) are exposed at the bottom of the outer shell (8). The pin (1) is inserted into and fixed to the bottom of the bottom cover (2) in a non-penetrating manner, and the coil group (4) and the pin (1) are located on both sides of the bottom cover (2).

2. The improved buzzer according to claim 1, characterized in that: The bottom cover (2) is made of high temperature resistant and high strength material.

3. The improved buzzer according to claim 2, characterized in that: The bottom cover (2) is made of bakelite material.

4. The improved buzzer according to claim 1, characterized in that: The pin (1) is inserted and fixed on the bottom cover (2); or the bottom cover (2) and the pin (1) are integrally formed.

5. The improved buzzer according to claim 1, characterized in that: The pin (1) is provided with an edge (101) or a rounded corner to increase the winding friction; or the cross section of the pin (1) is circular.

6. The improved buzzer according to claim 5, characterized in that: The cross-section of the pin (1) with the aforementioned sharp angle (101) or rounded corner is polygonal.

7. The improved buzzer according to claim 1, characterized in that: A winding bracket (3) is fixedly installed on the bottom cover (2), and a winding post (5) is installed on the winding bracket (3). The coil group (4) is wound on the winding post (5).

8. The manufacturing process of the improved buzzer as described in any one of claims 1-7, characterized in that: The buzzer also includes a magnetic ring (6), a vibrating plate (7), and a housing (8); the manufacturing process of the buzzer includes the following steps. Step 1: Insert the pin (1) onto the bottom cover (2); Step 2: Apply adhesive to bond the bottom cover (2) and the winding bracket (3) for winding the coil assembly (4) to form a whole; Step 3: Place the component made in step 2 into a winding machine for twisting and winding to wind the coil assembly (4). Step 4: After the coil group (4) is completed, a tinning process is performed to form a tin layer on the pins (1) and / or the stranded wire portion; Step 5: Assemble the magnetic ring (6), the vibrating plate (7) and the outer shell (8), and perform glue application to seal the holes and / or epoxy potting.

9. The manufacturing process according to claim 8, characterized in that: Two pins (1) are provided; the process of twisting the wire first and then winding the wire is as follows: ① Twist the wire (401) used to make the coil group (4) to any pin (1); ② Wind the wire (401) to make the coil group (4); ③ Twist the wire (401) to the other pin (1).

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