Oscillating bar mechanism for driving grating to move

Abstract

The utility model relates to an oscillating bar mechanism for driving a grating to move, which comprises an oscillating bar seat, an oscillating bar and a ball shaft, one end of the oscillating bar is connected with the oscillating bar seat, the other end of the oscillating bar is connected with the ball shaft, the ball shaft is arranged on a sliding block and connected with the sliding block, and one side of the oscillating bar seat far away from the oscillating bar is connected with a grating seat. The swing rod does not generate an interference phenomenon in the whole stroke, the adjusting range is large, and the precision is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to a swing rod mechanism for driving grating movement. Background Art

[0002] A spectrophotometer is a scientific instrument that decomposes light with complex components into spectral lines. A spectrophotometer uses a light source that can generate multiple wavelengths, and a series of spectroscopic devices to generate a light source with a specific wavelength. After the light passes through the sample being tested, part of the light is absorbed, and the absorbance value of the sample is calculated, which is then converted into the concentration of the sample. The absorbance value of the sample is proportional to the concentration of the sample.

[0003] The grating pendulum used in the current spectrophotometer has an unreasonable structural design, a small range of pendulum movement, and interference and stray light are prone to occur during movement, resulting in poor performance of the spectrophotometer. Utility Model Content

[0004] The purpose of the utility model is to provide a rocker mechanism for driving the grating movement, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rocker mechanism for driving a grating movement comprises a rocker seat, a rocker and a ball shaft, wherein one end of the rocker is connected to the rocker seat, and the other end is connected to the ball shaft, the ball shaft is arranged on a slider, the ball shaft is connected to the slider, and the side of the rocker seat away from the rocker is connected to the grating seat.

[0007] In a possible implementation, the rocker arm includes an upper rod portion, a rocker arm body and a lower rod portion, the rocker arm body is located between the upper rod portion and the lower rod portion, the upper rod portion is inserted into the connecting hole of the rocker arm seat, and the lower rod portion is connected to the ball shaft.

[0008] Optionally, an internal thread is provided in the connecting hole, an external thread is provided on the upper rod portion, and the rocker rod is threadedly connected to the rocker rod seat.

[0009] Optionally, the ball shaft includes a receiving cavity and a rotating portion, the lower rod portion is inserted into the receiving cavity, and the rotating portion is connected to the sliding block.

[0010] Optionally, the rocker body adopts a hexagonal prism structure.

[0011] In a possible implementation, the rocker seat includes a connecting portion, a supporting portion and a fixing portion, the supporting portion is arranged between the connecting portion and the fixing portion, the connecting portion and the supporting portion are arranged at a certain angle, and the connecting hole is located on a side of the connecting portion away from the supporting portion.

[0012] Optionally, a positioning block is formed on a side of the support portion away from the connecting portion, and the positioning block is connected to the grating seat.

[0013] Optionally, a mounting hole is formed on the fixing portion, and the rocker seat is fixed on the grating seat through the mounting hole.

[0014] Optionally, the connecting portion, the supporting portion and the fixing portion are integrally formed by machining.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The swing arm will not cause interference during the entire stroke, with a large adjustment range, greatly improving accuracy;

[0017] 2. The pendulum and the slider can be arranged on the same plane, which reduces the vertical height of the entire pendulum mechanism and can effectively reduce the stray light of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model after being installed in a spectrophotometer;

[0019] Figure 2 It is a structural diagram of the swing rod seat of the utility model;

[0020] Figure 3 It is a structural diagram of the swing rod of the utility model;

[0021] Figure 4 It is a structural diagram of the ball shaft of the utility model.

[0022] In the figure: 10, rocker seat, 20, rocker, 30, ball shaft, 40, grating seat, 50, slider, 11, connecting part, 12, fixing part, 111, connecting hole, 112, positioning block, 121, mounting hole, 13, supporting part, 21, upper rod part, 22, rocker body, 23, lower rod part, 31, accommodating chamber, 32, rotating part. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] like Figure 1-4As shown, a rocker mechanism for driving grating movement includes a rocker seat 10, a rocker 20 and a ball shaft 30, one end of the rocker 20 is connected to the rocker seat 10, and the other end is connected to the ball shaft 30, the ball shaft 30 is arranged on a slider 50, the ball shaft 30 is connected to the slider 50, and the side of the rocker seat 10 away from the rocker 20 is connected to the grating seat 40.

[0025] In the present application, the slider 50 can be connected to one end of the screw rod, and the other end of the screw rod is connected to a driving mechanism such as a motor. When the motor drives the screw rod to rotate, it will push the slider 50 to make a linear motion, and then push the pendulum 20 to rotate through the ball shaft 30, so as to achieve the grating angle change and realize the light splitting function. There is an angle between the pendulum rod seat 10 and the pendulum rod 20. When the length of the pendulum rod 20 is actually adjusted, the effective length is equal to the length of the pendulum rod 20 multiplied by the cosine value of the angle between the pendulum rod seat and the pendulum rod, thereby increasing the adjustable range and making the instrument more accurate.

[0026] The swing rod 20 includes an upper rod 21, a swing rod body 22 and a lower rod 23, wherein the swing rod body 22 is located between the upper rod 21 and the lower rod 23, the upper rod 21 is inserted into the connecting hole 111 of the swing rod seat 10, and the lower rod 23 is connected to the ball shaft 30. The upper rod 21, the swing rod body 22 and the lower rod 23 can be integrally formed by machining. The swing rod body 22 preferably adopts a hexagonal prism structure.

[0027] The ball shaft 30 can be made by machining an ordinary steel ball, that is, a receiving cavity 31 is opened on the ordinary steel ball by machining, and the part of the ball shaft 30 excluding the receiving cavity 31 is a rotating part 32, and the rotating part 32 is connected to the slider 50. The receiving cavity 31 is used to accommodate the lower rod 23. When the lower rod 23 of the swing rod 20 is inserted into the receiving cavity 31, the swing rod can swing with the movement of the ball shaft 30.

[0028] In order to prevent the swing rod 20 from falling out of the swing rod seat 10 when swinging, the connection hole 111 is provided with an internal thread, the upper rod portion 21 is provided with an external thread, and the swing rod 20 is threadedly connected to the swing rod seat 10 .

[0029] The swing rod seat 10 includes a connecting portion 11, a supporting portion 13 and a fixing portion 12, wherein the supporting portion 13 is disposed between the connecting portion 11 and the fixing portion 12, the connecting portion 11 and the supporting portion 13 are disposed at a certain angle, and the connecting hole 111 is located at a side of the connecting portion 11 away from the supporting portion 13. The connecting portion 11 and the supporting portion 13 are disposed at a certain angle (usually an obtuse angle) to increase the change angle when the swing rod swings.

[0030] A positioning block 112 is formed on one side of the support portion 13 away from the connecting portion 11, and the positioning block 112 is connected to the grating seat 40. The positioning block 112 has an arc surface, which matches the shape of the grating seat 40, so that the swing rod seat 10 and the grating seat 40 can be connected more closely, so that the grating seat 40 can rotate in time without delay.

[0031] A mounting hole 121 is also formed on the fixing portion 12 , and the rocker seat 10 is fixed to the grating seat 40 through the mounting hole 121 .

[0032] In the present application, the connecting portion 11, the supporting portion 13 and the fixing portion 12 are integrally formed by machining.

[0033] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", "left and right", "front and back", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rocker mechanism for driving grating motion, characterized in that: The invention comprises a swing rod seat (10), a swing rod (20) and a ball shaft (30), wherein one end of the swing rod (20) is connected to the swing rod seat (10), and the other end is connected to the ball shaft (30), the ball shaft (30) is arranged on a slider (50), the ball shaft (30) is connected to the slider (50), and a side of the swing rod seat (10) away from the swing rod (20) is connected to a grating seat (40); The swing rod (20) comprises an upper rod portion (21), a swing rod body (22) and a lower rod portion (23); the swing rod body (22) is located between the upper rod portion (21) and the lower rod portion (23); the upper rod portion (21) is inserted into a connecting hole (111) of the swing rod seat (10); and the lower rod portion (23) is connected to the ball shaft (30); The swing rod body (22) adopts a hexagonal column structure.

2. The rocker mechanism for driving grating motion according to claim 1, characterized in that: An internal thread is provided in the connection hole (111), an external thread is provided on the upper rod portion (21), and the swing rod (20) is threadedly connected to the swing rod seat (10).

3. The rocker mechanism for driving grating motion according to claim 1, characterized in that: The ball shaft (30) comprises a receiving cavity (31) and a rotating portion (32); the lower rod portion (23) is inserted into the receiving cavity (31); and the rotating portion (32) is connected to the sliding block (50).

4. The rocker mechanism for driving grating motion according to claim 1, characterized in that: The rocker seat (10) comprises a connecting portion (11), a supporting portion (13) and a fixing portion (12); the supporting portion (13) is arranged between the connecting portion (11) and the fixing portion (12); the connecting portion (11) and the supporting portion (13) are arranged at a certain angle; and the connecting hole (111) is located on a side of the connecting portion (11) away from the supporting portion (13).

5. The rocker mechanism for driving grating motion according to claim 4, characterized in that: A positioning block (112) is formed on one side of the support portion (13) away from the connecting portion (11), and the positioning block (112) is connected to the grating seat (40).

6. The rocker mechanism for driving grating motion according to claim 5, characterized in that: A mounting hole (121) is formed on the fixing portion (12), and the swing rod seat (10) is fixed to the grating seat (40) via the mounting hole (121).

7. The rocker mechanism for driving grating motion according to claim 6, characterized in that: The connecting portion (11), the supporting portion (13) and the fixing portion (12) are integrally formed by machining.

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