Key service life testing machine

Abstract

The utility model discloses a key service life testing machine, which is characterized by comprising a machine base, a testing table, a motor, an eccentric disc, a pressing plate, a pressing rod and a counterweight piece, a vertical sliding rail is arranged on the machine base. The pressing plate is in sliding fit with the vertical sliding rail; the test bench is arranged on the machine base and located below the pressing plate. The output end of the motor is connected with the eccentric disc; a matching wheel is mounted on the pressing plate; the matching wheel is positioned above the eccentric disc and is in contact fit with the eccentric disc; the pressing rod is mounted on the pressing plate; and the counterweight piece is placed on the pressing plate or the pressing rod. The key service life testing device can be used for testing the service life of a key, can solve the problem that in the prior art, the number of pressing times cannot be tested under the conditions of different forces and different intermittent time, and is more accurate and comprehensive in key product service life result and quality evaluation result.

Description

Technical Field

[0001] The utility model relates to a key life testing machine. Background Art

[0002] The current key life tester is mainly used to test the number of presses. The key press life test is usually determined based on the product's usage frequency requirements and expected life span, which can range from thousands to hundreds of thousands of times.

[0003] Other key factors that affect the life of keys include pressing force and interval time. However, the current key life testing machines have certain pressing force and interval time during the pressing number life test. It is impossible to perform pressing number tests under conditions of different forces and different interval times. There are deviations and deficiencies in the product life results and quality assessment. At the same time, it is not suitable for targeted life tests on key products with different usage conditions. Utility Model Content

[0004] The utility model provides a key life tester, which can solve the problems that the prior art cannot test the number of presses under conditions of different forces and / or different intermittent times, and there are deviations and deficiencies in product life results and quality assessment.

[0005] In order to achieve the above-mentioned purpose, the solution of the utility model is: a key life testing machine, characterized in that: it includes a machine base, a test bench, a motor, an eccentric disk, a pressure plate, a pressing rod and a counterweight; the machine base is provided with a vertical slide rail; the pressure plate is slidably matched with the vertical slide rail; the test bench is arranged on the machine base and located below the pressure plate; the motor output end is connected to the eccentric disk; a mating wheel is installed on the pressure plate; the mating wheel is located above the eccentric disk and in contact with it; the pressing rod is installed on the pressure plate; the counterweight is placed on the pressure plate or the pressing rod.

[0006] Preferably, there are two vertical slide rails which are spaced apart and arranged in parallel; two sliders are arranged at the rear end of the pressure plate; and the two sliders are respectively slidably matched with the vertical slide rails.

[0007] Preferably, the pressing rod comprises a fixing sleeve, a threaded rod and a contact head; the fixing sleeve is fixed on the pressing plate; the middle portion of the threaded rod is threadably matched with the fixing sleeve; and the contact head is detachably fixed to the lower end of the threaded rod.

[0008] Preferably, the contact head is made of rubber.

[0009] Preferably, the counterweight is a round hole weight; the counterweight is sleeved on the threaded rod and is located above the pressure plate.

[0010] Furthermore, a counterweight placement rack is provided on the machine base.

[0011] Preferably, the counterweight placement rack comprises a tray; a plurality of vertical poles are provided on the tray.

[0012] Preferably, the motor is a stepper motor, a brushless DC motor or an AC servo motor.

[0013] Beneficial effects of the utility model:

[0014] First, the utility model can be used for key life test and can solve the problem that the prior art cannot test the number of presses under different forces and / or different interval times, and the key product service life results and quality assessment results are more accurate and comprehensive;

[0015] Second, the utility model can ensure the linear movement of the vertical slide rail because the pressing plate moves along the vertical slide rail when the pressing plate moves up and down, so that the pressing rod on the pressing plate can be aligned and pressed and tested repeatedly every time;

[0016] Third, since the threaded rod of the push rod of the utility model is matched with the thread of the fixed sleeve, the working height of the contact head can be adjusted by rotating the threaded rod, which meets the requirements of different button pressing heights and can be applied to more types of button tests with good versatility. And since the contact head is detachably connected to the lower end of the threaded rod, the contact head can be directly disassembled and replaced after being worn or damaged, without the need to replace the entire push rod, which can save maintenance costs;

[0017] Fourthly, the contact head of the pressing rod of the utility model is made of rubber material. When pressing, the contact head on the pressing rod is in elastic contact with the key, which can avoid damaging the key;

[0018] Fifth, compared with the prior art method of replacing the pressure spring and adjusting the length of the pressure spring, the utility model has the advantages of being simpler to operate, more flexible, and more practical because it adjusts the pressing force during key testing by increasing or decreasing the number and replacing different types of counterweights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a front view of a key life testing machine.

[0020] Figure 2 yes Figure 1 Middle AA section view (when the push rod is pressed down to the bottom).

[0021] Figure 3 yes Figure 1 Middle AA section view (when the push rod is released upward to the top).

[0022] Figure 4-6The utility model is a stereoscopic diagram of a key life testing machine.

[0023] Figure 7 It is a cross-sectional view showing the fitting relationship between the pressing rod and the pressing plate. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Example 1: See Figure 1-7 A key life testing machine includes a machine base 1, a test bench 2, a motor 3, an eccentric disk 4, a pressing plate 5, a pressing rod 6 and a counterweight 7.

[0026] In addition, a start switch 1-2, a fan 1-3 and a foot pad 1-4 are arranged on the base 1. The base 1 has a table top 1-11. A rear stop 1-12 is arranged on the table top 1-11.

[0027] Specifically, a vertical slide rail 1-1 is fixed on the rear stop 1-12 of the machine base 1; the pressure plate 5 is slidably matched with the vertical slide rail 1-1. Preferably, the vertical slide rail 1-1 has two and is spaced apart and parallel to each other; two sliders 5-1 are provided at the rear end of the pressure plate 5; the two sliders 5-1 are slidably matched with the vertical slide rail 1-1 respectively.

[0028] Among them, a matching wheel 8 is installed on the pressure plate 5; the matching wheel 8 is located above the eccentric disk 4 and is in contact with it; the pressing rod 6 is fixedly installed on the pressure plate 5; and the counterweight 7 is placed on the pressure plate 5 or the pressing rod 6.

[0029] Since the pressing plate 5 is guided along the vertical slide rail 1 - 1 when moving up and down, the vertical slide rail 1 - 1 can be guaranteed to move linearly, so that the pressing rod 6 on the pressing plate 5 can be aligned, pressed and tested repeatedly each time.

[0030] The test bench 2 is fixedly mounted on the machine base 1 and is located below the pressing plate 5 .

[0031] The motor 3 is horizontally fixedly mounted on the table 1-11 of the base 1, and the output end of the motor 3 is fixedly connected to the eccentric disk 4. Specifically, an axial hole is provided on the eccentric disk 4 at an eccentric position, and the axial hole is fixedly connected to the output end of the motor 3; when the motor 3 rotates, the eccentric disk 4 rotates eccentrically.

[0032] The motor 3 is connected to the controller circuit. The controller is used to control the start and stop of the motor 3, the speed, the working time, etc., and then calculate and output the number of presses. Since the working principle of this controller belongs to the prior art, it is not repeated here.

[0033] visible Figure 7The pressing rod 6 includes a fixing sleeve 6-1, a threaded rod 6-2 and a contact head 6-3; the fixing sleeve 6-1 is fixed on the pressing plate 5; the middle part of the threaded rod 6-2 is threadedly matched with the fixing sleeve 6-1; the fixing sleeve 6-1 has an internal threaded hole. The contact head 6-3 is detachably fixed to the lower end of the threaded rod 6-2. Since the threaded rod 6-2 is threadedly matched with the fixing sleeve 6-1, the working height of the contact head 6-3 can be adjusted by rotating the threaded rod 6-2 to meet the requirements of different button pressing heights, and can be applied to more types of button tests with good versatility. Since the contact head 6-3 is detachably connected to the lower end of the threaded rod 6-2, the contact head 6-3 can be directly disassembled and replaced after being worn or damaged, and there is no need to replace the pressing rod 6 as a whole, which can save maintenance costs.

[0034] Specifically, the contact head 6-3 is sleeved on the lower end of the threaded rod 6-2 by interference fit, or the contact head 6-3 is threadedly matched with the lower end of the threaded rod 6-2, so that a detachable fixed connection can be achieved between them.

[0035] The number and position of the pressing rods 6 installed on the pressing plate 5 are determined according to the number and distribution of pressing positions of the key product being tested, and are not limited to the number and position.

[0036] visible Figure 7 Preferably, the fixing sleeve 6-1 is installed on the pressing plate 5, a flange 6-11 is provided on the upper end of the fixing sleeve 6-1, and the flange 6-11 and the pressing plate 5 are fixed by screws 6-12.

[0037] visible Figure 7 Preferably, the contact head 6-3 is made of rubber. When pressing, the contact head 6-3 on the pressing rod 6 is in elastic contact with the key, which can avoid damaging the key.

[0038] visible Figure 7 Preferably, the counterweight 7 adopts a round hole weight; the counterweight 7 is mounted on the threaded rod 6 - 2 and is located above the pressure plate 5 .

[0039] Specifically, the motor 3 is a stepper motor, a brushless DC motor or an AC servo motor.

[0040] The working principle of this embodiment is as follows (see Figure 1-3 ):

[0041] During the test, the motor 3 is started to work, and the motor 3 drives the eccentric disk 4 to rotate eccentrically. The eccentric disk 4 is located below the mating wheel 8 and contacts with it. The distance between the contact point between the eccentric disk 4 and the mating wheel 8 and the rotation center of the eccentric disk 4 will move periodically from small to large and then from large to small, thereby causing the mating wheel 8 to reciprocate up and down. The pressing plate 5 moves with the mating wheel 8, and the pressing plate 5 drives the pressing rod 6 to reciprocate up and down, thereby realizing the cycle of pressing down-releasing upward-pressing down-releasing upward... As the motor 3 rotates one circle, the pressing rod 6 will be pressed once, and the number of times the key is pressed can be calculated based on the speed and working time of the motor 3, thereby realizing the life test.

[0042] When releasing upward: the motor 3 drives the eccentric disc 4 to rotate, and the distance between the contact point between the eccentric disc 4 and the mating wheel 8 and the rotation center of the eccentric disc 4 increases from small to large, thereby continuously pushing up the mating wheel 8, and the pressing plate 5 drives the pressing rod 6 to move upward (see Figure 3 ).

[0043] When pressing downward: the motor 3 drives the eccentric disk 4 to rotate, and the distance between the contact point between the eccentric disk 4 and the matching wheel 8 and the rotation center of the eccentric disk 4 changes from large to small. Under the total gravity composed of its own weight and the weight of the counterweight 7 and the pressing rod 6 thereon, the pressing plate 5 automatically moves downward along the vertical slide rail 1-1 as a whole. At the same time, when descending, the matching wheel 8 keeps in contact with the eccentric disk 4, and the pressing rod 6 moves downward under the total gravity and presses the test button (see Figure 2 The pressing force exerted by the pressing rod 6 on the button is positively correlated with the size of the counterweight 7: when the pressing force needs to be increased, a counterweight 7 with a heavier weight or a larger number can be selected; when the pressing force needs to be reduced, a counterweight 7 with a smaller weight or a smaller number can be selected to adjust the pressing force.

[0044] Compared with the replacement of the pressure spring and the adjustment of the length of the pressure spring adopted in the prior art, the present application realizes the adjustment of the pressing force during the key test by increasing or decreasing the number and replacing the weight pieces 7 of different types, which has the advantages of being simpler to operate, more flexible, and more practical.

[0045] Since the motor 3 is a stepper motor, a DC brushless motor or an AC servo motor, the speed of the motor 3 during operation can be set and modified through a program, thereby realizing the adjustment of the intermittent time of pressing.

[0046] Therefore, the utility model can be used for key life testing and can solve the problem that the prior art cannot test the number of presses under conditions of different forces and / or different intermittent times, and the service life results and quality evaluation results of key products are more accurate and comprehensive.

[0047] Embodiment 2: This embodiment is based on embodiment 1 and is further improved:

[0048] visible Figure 4-6 , a counterweight placement rack 9 is provided on the base 1. Preferably, the counterweight placement rack 9 includes a tray 9-1; a plurality of vertical rods 9-2 are provided on the tray 9-1. In this embodiment, four vertical rods 9-2 are provided on the tray 9-1, which are respectively used to place four different weight types of counterweights 7 (such as round hole weights).

[0049] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A key life tester, characterized in that: It comprises a machine base (1), a test bench (2), a motor (3), an eccentric disc (4), a pressing plate (5), a pressing rod (6) and a counterweight (7); The machine base (1) is provided with a vertical slide rail (1-1); the pressing plate (5) is slidably matched with the vertical slide rail (1-1); The test bench (2) is arranged on the machine base (1) and is located below the pressing plate (5); The output end of the motor (3) is connected to the eccentric disk (4); A matching wheel (8) is mounted on the pressure plate (5); the matching wheel (8) is located above the eccentric disc (4) and is in contact with it; The pressing rod (6) is mounted on the pressing plate (5); and the counterweight (7) is placed on the pressing plate (5) or the pressing rod (6).

2. A key life tester as claimed in claim 1, characterized in that: The vertical slide rails (1-1) have two and are spaced apart and distributed in parallel; Two sliding blocks (5-1) are provided at the rear end of the pressing plate (5); the two sliding blocks (5-1) are respectively slidably matched with the vertical sliding rails (1-1).

3. A key life tester as claimed in claim 1, characterized in that: The pressing rod (6) comprises a fixing sleeve (6-1), a threaded rod (6-2) and a contact head (6-3); the fixing sleeve (6-1) is fixed on the pressing plate (5); the middle part of the threaded rod (6-2) is threadedly matched with the fixing sleeve (6-1); and the contact head (6-3) is detachably fixed to the lower end of the threaded rod (6-2).

4. A key life tester as claimed in claim 3, characterized in that: The contact head (6-3) is made of rubber.

5. A key life tester as claimed in claim 3, characterized in that: The counterweight (7) is a round hole weight; the counterweight (7) is sleeved on the threaded rod (6-2) and is located above the pressure plate (5).

6. A key life tester as claimed in claim 1, characterized in that: A counterweight placement rack (9) is provided on the machine base (1).

7. A key life tester as claimed in claim 6, characterized in that: The counterweight placement rack (9) comprises a tray (9-1), and a plurality of vertical rods (9-2) are arranged on the tray (9-1).

8. A key life tester as claimed in claim 1, characterized in that: The motor (3) is a stepping motor, a brushless DC motor or an AC servo motor.

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