Loudspeaker drop test bench

Abstract

The invention discloses a loudspeaker drop test bench, and relates to the technical field of loudspeaker detection, a material receiving groove is formed in the bottom surface of the front side of a base, two vertical frames of the same structure are arranged on the rear side of the top of the base, vertical groove bodies are formed in the vertical frames, and the front ends of the two vertical groove bodies are connected with a test bench; the top of the base is provided with a power assembly, the power assembly is arranged between the two sets of vertical frames, the top power end of the power assembly is provided with a threaded rod, and the rear end of the test board is connected with a connecting threaded block. After the specified height of the loudspeaker drop test is reached, the drop test is carried out, the use of the electromagnet structure can make the blanking plate fall down instantly, the loudspeaker to be tested can be subjected to the drop test in a free falling body simulation mode, and the obtained data is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of loudspeaker detection, in particular to a loudspeaker drop test bench. Background Art

[0002] A speaker is a device that converts electrical signals into sound signals and is a key component in modern audio playback systems. Its working principle is to use electromagnetic induction to convert electrical signals into mechanical vibrations, which in turn drive the air to generate sound waves. The finished product needs to undergo relevant testing items, such as the speaker drop test, which is an important test to measure its reliability and durability. This test mainly simulates the drop conditions that the speaker may encounter in actual use to evaluate its performance after the impact;

[0003] For example, the prior art application number CN201920861804.9 provides a drop device for verifying the strength of a speaker. It includes an external frame, an external baffle, an inner baffle and a speaker; the outer baffle is slidably connected to the external frame, the outer baffle is provided with a through hole and a fixing member, the inner baffle is inserted into and fixed to the through hole of the outer baffle through the fixing member, and the speaker is fixedly connected to the inner baffle;

[0004] The above-mentioned prior art is known through actual usage. It is known that it mainly fixes the speaker on the outer baffle plate through the inner baffle plate through the external frame, the outer baffle plate and the inner baffle plate, and the outer baffle plate is clamped on the external frame for free fall; however, it is found during use that the product needs to simulate different heights to carry out tests in different environments during testing, and it is necessary to simulate free fall in order to achieve the accuracy of the test data. For this reason, we have improved the above-mentioned prior art according to actual usage. Summary of the invention

[0005] The object of the present invention is to provide a loudspeaker drop test bench to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A speaker drop test bench comprises a base, a material receiving groove is provided on the bottom surface of the front side of the base, two groups of vertical frames with the same structure are arranged on the rear side of the top of the base, a vertical groove body is provided on the vertical frame, the front ends of the two groups of vertical groove bodies are connected to the test bench, a power assembly is arranged on the top of the base, and the power assembly is arranged between the two groups of vertical frames, a threaded rod is installed on the top power end of the power assembly, a connecting thread block is connected to the rear end of the test bench, the connecting thread block is threadedly connected to the threaded rod, the top of the threaded rod is connected to the threaded rod bracket through a bearing member, the bottom of the threaded rod bracket is installed on the rear side wall of the base, a support rod is provided on the top of the base, and a control switch is installed on the top of the support rod, two groups of counterweight assemblies with the same structure are arranged on the rear side of the base, and each group of counterweight assemblies abuts against the outer wall of the rear bottom of the vertical frame.

[0008] Further: a receiving plate is placed on the sliding side of the inner cavity of the receiving tray, a receiving chute is opened on both sides of the inner wall of the receiving tray, and a receiving slider matching the receiving chute is arranged on both side walls of the receiving plate, and a pressure sensor is arranged at the bottom of the inner cavity of the receiving tray, and the pressure sensor is in contact with the bottom of the receiving plate.

[0009] Furthermore: a battery is installed on the top rear side of the test bench, two groups of L-shaped brackets with the same structure are symmetrically arranged on the top of both sides of the test bench, the bottom of the L-shaped bracket is connected to an electromagnet structure, and the electromagnet structure is electrically connected to the battery through a wire, hinges are installed on both sides of the bottom of the test bench, and blanking plates are installed on the hinges, the ends of the two groups of blanking plates are in contact, and the two groups of blanking plates are provided with iron sheets corresponding to the positions of the electromagnets.

[0010] Further: two groups of clamping rods are arranged on the top of the test bench, and the two groups of clamping rods are arranged between two groups of L-shaped brackets, and movable grooves adapted to the clamping rods are opened on the inner wall of the test bench, and two groups of vertical sliding blocks are arranged at the rear end of the test bench, and the vertical sliding blocks are matched with the vertical sliding grooves.

[0011] Further: the power assembly includes a motor, four groups of mounting plates with the same structure are evenly arranged on the bottom of the motor, the motor is installed on the top of the base through the mounting plates, four groups of rubber columns with the same structure are arranged on the top disc of the motor, and positioning plates are installed on the top of the rubber columns, and the positioning disc is provided with a through hole matching the shaft rod of the power end of the motor.

[0012] Further: the counterweight assembly includes a support plate abutting against the back of the vertical frame, the support plate is provided with reinforcing ribs, square plates are connected to both sides of the support plate, and mounting bolts are installed on the square plates.

[0013] Furthermore: the supporting plate is an L-shaped structure, and a receiving groove matching the supporting plate is provided on the base, and a bolt hole matching the mounting bolt is provided on the base.

[0014] Furthermore: the height of the threaded rod is equal to the height of the vertical frame, and the distance between the threaded rod and the vertical frames on both sides in the horizontal direction is equal.

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

[0016] 1. In the present invention, the threaded rod is driven to rotate by the power component, and the test bench is slowly and steadily raised by means of the connecting threaded block. After reaching the specified height of the speaker drop test, the drop test is carried out. The use of the electromagnet structure can make the blanking plate fall instantly, and the speaker to be tested can simulate the free fall form to carry out the drop test, so that the data obtained is more accurate and the operation is simple.

[0017] 2. With respect to other problems pointed out in the background technology, the solutions thereof are explained. In the present invention, different ground textures are simulated by means of replaceable receiving plates in the receiving trough, and various ground simulation tests can be performed to meet various simulation needs. The adjustable clamping rod can clamp the speaker to be tested, and its adjustability also makes it convenient to test the speaker in different postures, which facilitates various tests and obtains more comprehensive data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a rear view of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the material receiving trough of the present invention;

[0021] Figure 4 This is a schematic diagram of the test bench structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the power assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the counterweight assembly of the present invention.

[0024] In the figure: 1. base; 2. material receiving trough; 3. vertical frame; 4. test bench; 41. battery; 42. L-shaped bracket; 43. electromagnet structure; 44. blanking plate; 45. iron sheet; 46. hinge; 47. clamping rod; 48. movable groove; 49. vertical slider; 5. power assembly; 51. motor; 52. mounting plate; 53. rubber column; 54. positioning plate; 6. vertical trough; 7. threaded rod; 8. threaded rod bracket; 9. connecting thread block; 10. support rod; 11. control switch; 12. counterweight assembly; 121. support plate; 122. reinforcing rib; 123. square plate; 124. mounting bolt; 13. material receiving plate; 14. material receiving chute. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The present invention provides a technical solution: a speaker drop test bench, comprising a base 1, a material receiving groove 2 is provided on the bottom surface of the front side of the base 1, and the speaker in the drop test directly falls into the material receiving groove 2 for easy storage, two groups of vertical frames 3 with the same structure are arranged on the top rear side of the base 1, and vertical grooves 6 are arranged on the vertical frames 3, and the front ends of the two groups of vertical grooves 6 are connected to a test bench 4, and the test bench 4 is raised on the two groups of vertical frames 3, and the drop test operation is performed after reaching a certain test height, a power assembly 5 is arranged on the top of the base 1, and the power assembly 5 is arranged between the two groups of vertical frames 3, and a threaded rod 7 is installed on the top power end of the power assembly 5, and a connecting thread block 9 is connected to the rear end of the test bench 4, and the connecting thread block 9 is threadedly connected to the threaded rod 7, and the thread The rod 7 rotates, driving the connecting threaded block 9 to move up and down in the vertical direction, thereby driving the test bench 4 to move up and down to reach the specified height of the drop test. The top of the threaded rod 7 is connected to the threaded rod bracket 8 through a bearing member, and the bottom of the threaded rod bracket 8 is installed on the rear side wall of the base 1, providing good stability for the threaded rod 7. A support rod 10 is provided on the top of the base 1, and a control switch 11 is installed on the top of the support rod 10. The control switch 11 is electrically connected to the battery 41, pressure sensor, motor 51 and electromagnet structure 43 in the device. Two groups of counterweight assemblies 12 with the same structure are provided on the rear side of the base 1, and each group of counterweight assemblies 12 abuts against the outer wall of the rear bottom of the vertical frame 3. The counterweight assembly 12 provides rear support force for the vertical frame to ensure its stability.

[0027] In this embodiment, refer to Figure 1 and Figure 2 After the speaker to be tested in the drop test is placed on the test bench 4, the power assembly 5 is controlled by the control switch 11 to drive the threaded rod 7 to rotate, and the threaded block 9 is connected to drive the test bench 4 to rise to the specified height of the drop test. Because the drop test simulates the drop impact during transportation and use, the test height is limited. The product to be tested falls and falls into the receiving trough 2, and data can be collected or a second or third test operation can be performed.

[0028] Among them, preferably, a receiving plate 13 is placed on the sliding side of the inner cavity of the receiving tray 2, and material receiving chutes 14 are opened on both sides of the inner wall of the receiving tray 2, and material receiving sliding blocks matching the material receiving chutes 14 are arranged on the two side walls of the receiving plate 13, so as to facilitate the placement of the receiving plate 13 into the receiving tray 2, and also facilitate the replacement of the receiving plate 13, and can simulate different falling surfaces according to different materials, thereby improving the accuracy of the drop test, and a pressure sensor is arranged at the bottom of the inner cavity of the receiving tray 2, and the pressure sensor is in contact with the bottom of the receiving plate 13.

[0029] In this embodiment, refer to Figure 1 and Figure 3 The loudspeaker to be tested falls from the test bench 4 and falls onto the receiving plate 13 in the receiving tray 2. The pressure sensor transmits the data to the control center on the control switch 11 for data collection (the system and principle of the control switch and the control center belong to the prior art and will not be elaborated on). With the use of the receiving chute 14 and the receiving slider, the receiving plate 13 can be easily removed and replaced, and the receiving plates 13 of different materials can be replaced for testing in different falling environments.

[0030] Preferably, a battery 41 is installed on the top rear side of the test bench 4, and two groups of L-shaped brackets 42 with the same structure are symmetrically arranged on the top of both sides of the test bench 4. The bottom of the L-shaped bracket 42 is connected to an electromagnet structure 43 (the electromagnet structure 43 is composed of an iron core, a coil and a shell, and uses current to pass through the coil to generate a magnetic field. Its working principle is based on the electromagnetic induction phenomenon and belongs to the prior art), and the electromagnet structure 43 is electrically connected to the battery 41 through a wire to provide current to the coil on the electromagnet structure 43. Hinges 46 are installed on both sides of the bottom of the test bench 4, and blanking plates 44 are installed on the hinges 46. The ends of the two groups of blanking plates 44 are in contact with each other, and the two groups of blanking plates 44 are provided with iron sheets 45 corresponding to the positions of the electromagnets 43.

[0031] In this embodiment, refer to Figure 1 and Figure 4 The product to be tested is placed on the two sets of blanking plates 44 of the test bench 4. At this time, the battery 41 provides current to the electromagnet structure 43, which is in a powered-on state. The electromagnet structure 43 and the iron sheet 45 attract each other, and the blanking plates 44 provide supporting force for the product to be tested. When the test bench 4 rises to a specified height, the current of the electromagnet structure 43 is cut off by controlling the switch 11 to cut off the power. The blanking plates 44 are instantly opened to both sides under the action of the hinges 46, and the speaker falls freely, thereby improving the accuracy of the drop test.

[0032] Preferably, two groups of clamping rods 47 are provided on the top of the test bench 4, and the two groups of clamping rods 47 are arranged between two groups of L-shaped brackets, and movable grooves 48 adapted to the clamping rods 47 are opened on the inner wall of the test bench 4, and two groups of vertical sliders 49 are provided at the rear end of the test bench 4, and the vertical sliders 49 match the vertical slide grooves 6.

[0033] In this embodiment, refer to Figure 4 Because the speaker to be tested needs to be tested on all sides during the drop test, in order to facilitate placing the speaker in different postures, two sets of clamping rods 47 can be used to fix and limit the speaker to simulate drop test operations in different postures.

[0034] Preferably, the power assembly 5 includes a motor 51, and four groups of mounting plates 52 with the same structure are evenly arranged at the bottom of the motor 51. The motor 51 is installed on the top of the base 1 through the mounting plates 52 to fix the motor 51. Four groups of rubber columns 53 with the same structure are arranged on the top disc of the motor 5, and a positioning plate 54 is installed on the top of the rubber column 53, and a through hole matching the shaft rod of the power end of the motor 51 is opened on the positioning plate 54.

[0035] In this embodiment, refer to Figure 1 and Figure 5 The power assembly 5 provides power to the threaded rod 7, and the power end shaft of the motor 51 drives the threaded rod 7 to rotate. When the test bench 4 falls, the connecting thread block 9 at its rear end will be lowered to the bottom of the threaded rod 7. In order to protect the motor 51 from being hit by the connecting thread block 9 and directly contacting the positioning plate 54, four groups of rubber columns 53 provide a mitigation effect.

[0036] Preferably, the counterweight assembly 12 includes a support plate 121 abutting against the back of the vertical frame 3, a square slot is opened at the rear end of the base 1, and the size of the square slot matches the size of the support plate 121, reinforcing ribs 122 are provided on the support plate 121, square plates 123 are connected to both sides of the support plate 121, and mounting bolts 124 are installed on the square plate 123.

[0037] In this embodiment, refer to Figure 2 and Figure 6 After the vertical frame 3 is installed, in order to ensure good stability, a support plate 121 is installed at the rear bottom of the vertical frame 3 to provide auxiliary support force.

[0038] Preferably, the supporting plate 121 is an L-shaped structure, and a receiving groove matching the supporting plate 121 is provided on the base 1 , and a bolt hole matching the mounting bolt 124 is provided on the base 1 .

[0039] Preferably, the height of the threaded rod 7 is equal to the height of the vertical frame 3 , and the distance between the threaded rod 7 and the vertical frames 3 on both sides in the horizontal direction is equal.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A speaker drop test bench, characterized in that: include, A base (1) is provided with a material receiving trough (2) on the bottom surface of the front side of the base (1), two groups of vertical frames (3) with the same structure are arranged on the top rear side of the base (1), a vertical trough body (6) is arranged on the vertical frame (3), and the front ends of the two groups of vertical trough bodies (6) are connected to a test bench (4), a power assembly (5) is arranged on the top of the base (1), and the power assembly (5) is arranged between the two groups of vertical frames (3), a threaded rod (7) is installed on the top power end of the power assembly (5), and the rear end of the test bench (4) is connected to A connecting thread block (9) is threadedly connected to a threaded rod (7); the top of the threaded rod (7) is connected to a threaded rod bracket (8) via a bearing member; the bottom of the threaded rod bracket (8) is mounted on the rear side wall of the base (1); a support rod (10) is arranged on the top of the base (1); and a control switch (11) is installed on the top of the support rod (10); two groups of counterweight assemblies (12) of the same structure are arranged on the rear side of the base (1), and each group of counterweight assemblies (12) abuts against the outer wall of the rear bottom of the vertical frame (3).

2. A speaker drop test bench according to claim 1, characterized in that: A material receiving plate (13) is placed on the sliding side of the inner cavity of the material receiving tray (2), material receiving chutes (14) are opened on both sides of the inner wall of the material receiving tray (2), and material receiving sliding blocks matching the material receiving chutes (14) are arranged on both side walls of the material receiving plate (13), and a pressure sensor is arranged at the bottom of the inner cavity of the material receiving tray (2), and the pressure sensor is in contact with the bottom of the material receiving plate (13).

3. The speaker drop test bench according to claim 1, characterized in that: A storage battery (41) is installed on the rear side of the top of the test bench (4), two groups of L-shaped brackets (42) with the same structure are symmetrically arranged on the top of both sides of the test bench (4), the bottom of the L-shaped bracket (42) is connected to an electromagnet structure (43), and the electromagnet structure (43) is electrically connected to the storage battery (41) through a wire, hinges (46) are installed on both sides of the bottom of the test bench (4), and blanking plates (44) are installed on the hinges (46), the ends of the two groups of blanking plates (44) are in contact, and iron sheets (45) corresponding to the positions of the electromagnets (43) are arranged on the two groups of blanking plates (44).

4. The speaker drop test bench according to claim 3, characterized in that: Two groups of clamping rods (47) are arranged on the top of the test bench (4), and the two groups of clamping rods (47) are arranged between two groups of L-shaped brackets. A movable groove (48) adapted to the clamping rods (47) is opened on the inner wall of the test bench (4). Two groups of vertical sliding blocks (49) are arranged at the rear end of the test bench (4), and the vertical sliding blocks (49) match the vertical sliding grooves (6).

5. The speaker drop test bench according to claim 1, characterized in that: The power assembly (5) comprises a motor (51), the bottom of the motor (51) is evenly provided with four groups of mounting plates (52) of the same structure, the motor (51) is mounted on the top of the base (1) through the mounting plates (52), the top disc of the motor (5) is arranged with four groups of rubber columns (53) of the same structure, and the top of the rubber column (53) is installed with a positioning plate (54), and the positioning plate (54) is provided with a through hole matching the shaft rod of the power end of the motor (51).

6. The speaker drop test bench according to claim 1, characterized in that: The counterweight assembly (12) comprises a support plate (121) abutting against the back of the vertical frame (3), a reinforcing rib (122) being provided on the support plate (121), square plates (123) being connected to both sides of the support plate (121), and mounting bolts (124) being installed on the square plates (123).

7. The speaker drop test bench according to claim 6, characterized in that: The support plate (121) is an L-shaped structure, and a receiving groove matching the support plate (121) is provided on the base (1), and a bolt hole matching the mounting bolt (124) is provided on the base (1).

8. The speaker drop test bench according to claim 1, characterized in that: The height of the threaded rod (7) is equal to the height of the vertical frame (3), and the distance between the threaded rod (7) and the vertical frames (3) on both sides in the horizontal direction is equal.

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