Optical filter self-switching type infrared spectrometer

Abstract

The invention discloses an optical filter self-switching type infrared spectrometer, and belongs to the technical field of infrared spectrometers, the optical filter self-switching type infrared spectrometer comprises an infrared spectrometer body and a protective cover installed on the infrared spectrometer body, and a sample disc is installed in the infrared spectrometer body. A supporting side plate fixed to the infrared spectrometer body is arranged on the side edge of the sample disc, a filter disc is installed in the middle of the supporting side plate, a filter substrate is connected to the filter disc, a transmission insertion rod is connected to the middle of the filter disc through a first one-way bearing, and a positioning column is fixed to the end, away from the filter disc, of the transmission insertion rod; and the bending part on the locking piece is inserted into the hole in the back surface of the infrared spectrometer body. According to the optical filter self-switching type infrared spectrometer, the intensity and the wavelength range of light entering the spectrometer are controlled by adjusting the shielding area of the optical filter, so that the measurement precision and accuracy are improved, and meanwhile, the optical filter which does not need to be used can be shielded.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared spectrometers, and specifically to a filter self-switching infrared spectrometer. Background Technique

[0002] An infrared spectrometer is an instrument that uses the absorption characteristics of substances for infrared radiation of different wavelengths to analyze molecular structures and chemical compositions. An infrared spectrometer usually consists of a light source, a filter, a monochromator, a detector, and a computer information processing system.

[0003] For example, a Chinese patent with the publication number: CN219320070U, the patent name: An infrared spectrometer filter wheel adjustment mechanism, and the publication date: July 7, 2023, includes a spectral disk. A servo motor is connected to the central axis in the middle of the spectral disk. The input end of the servo motor is connected to a control circuit. Filter channels are equidistantly arranged on the surface of the spectral disk. A filter assembly is installed inside the filter channel. The filter assembly includes two filters. A retaining ring is arranged between the two filters. A sealing ring is sleeved on the front filter. Among the above existing technologies, the following technical problems may exist: When switching the filters of the existing infrared spectrometer, the adjustment is achieved by rotating the spectral disk. However, when the spectral disk is in use, it is not convenient to change the shielding area of the filter according to actual needs, thereby reducing the diverse requirements of the infrared spectrometer. At the same time, when using multiple filters for switching, it is not convenient to shield and protect the remaining idle filters during the use of the filters, resulting in the filters being exposed for a long time and the surface being easily attached with dust and other impurities, which affects the light transmittance during subsequent use.

[0004] Therefore, we propose a filter self-switching infrared spectrometer to solve the problems raised above. Summary of the Invention

[0005] The purpose of the present invention is to provide a filter self-switching infrared spectrometer to solve the problems in the current market proposed in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: A filter self-switching infrared spectrometer, comprising an infrared spectrometer body and a protective cover installed on the infrared spectrometer body. A sample disk is installed inside the infrared spectrometer body, and a support side plate fixed to the infrared spectrometer body is provided on the side of the sample disk. A filter disk is installed in the middle of the support side plate, and a filter substrate is connected to the filter disk. The middle of the filter disk is connected to a transmission insertion rod through a first one-way bearing, and a positioning column is fixed at the end of the transmission insertion rod away from the filter disk. A locking member is inserted into the positioning column, and the bent portion on the locking member is inserted into a hole on the back of the infrared spectrometer body. Protective shielding components are installed on both sides of the front and back of the filter substrate on the filter disk, and the protective shielding components are used for shielding and protection during the idle period of the filter substrate. A power opening and closing component for controlling the opening of the protective shielding component is installed on the side of the support side plate.

[0007] Preferably, the filter disk can rotate in the middle of the support side plate, and four filter substrates are evenly distributed at equal angles on the filter disk, and the light filtering rates of each filter substrate are different.

[0008] By adopting the above technical solution, the rotation of the filter disk can drive the filter substrates thereon to rotate synchronously, and the automatic switching of the filter substrates is realized by the rotation of the filter disk.

[0009] Preferably, the outer side of the positioning column and the inner wall of the middle part of the locking member are mutually attached, the longitudinal section of the positioning column is set as a rectangular structure, and the bent portion on the locking member coincides with the inner wall of the hole on the back of the infrared spectrometer body.

[0010] By adopting the above technical solution, by inserting the locking member onto the positioning column and inserting the bent portion on the locking member into the hole on the back of the infrared spectrometer body, the position of the transmission insertion rod can be fixed.

[0011] Preferably, the protective shielding component includes a shielding block, and a cleaning cotton is fixed on the side of the shielding block facing the filter substrate. A pressure-receiving rod is fixed on the side of the shielding block, and a receiving groove is opened inside the shielding block. A limiting rod is inserted into the receiving groove, and the limiting rod is fixed on the filter disk. One end of the limiting rod extending out of the receiving groove is connected to the shielding block through an auxiliary spring, and an air outlet is opened on the shielding block. The inner side of the end of the pressure-receiving rod away from the shielding block is set as an inclined surface.

[0012] By adopting the above technical solution, the setting of the auxiliary spring enables the shielding block to reset and rebound after moving on the limiting rod.

[0013] Preferably, the shielding blocks are symmetrically arranged with respect to the central axis of the filter substrate, and the symmetrically distributed shielding blocks shield the filter substrate in the initial state, and the cleaning cotton on the shielding blocks is in contact with the surface of the filter substrate.

[0014] By adopting the above technical solution, the filter substrate can be protected by using the symmetrically distributed shielding blocks, and at the same time, when the shielding blocks move, the cleaning cotton can also clean the dust attached to the surface of the filter substrate.

[0015] Preferably, the outer wall of the end of the limiting rod extending into the accommodating groove is in contact with the inner wall of the accommodating groove, and a sealing ring is circumferentially wrapped around the end of the limiting rod extending into the accommodating groove, and the accommodating groove communicates with the outside through an air outlet hole, and the air outlet end of the air outlet hole is inclined towards the direction of the filter substrate.

[0016] By adopting the above technical solution, the sealing performance between the end of the limiting rod and the accommodating groove can be improved through the sealing ring circumferentially wrapped around the end of the limiting rod.

[0017] Preferably, the power opening and closing component includes a second one-way bearing installed on the transmission plug rod, and a linkage half gear rotatably connected to the back of the infrared spectrometer body is installed outside the second one-way bearing. An engaging tooth rack is arranged outside the linkage half gear, and an extrusion block is fixed at one end of the engaging tooth rack away from the linkage half gear. A sealing plate is installed on the engaging tooth rack, and the sealing plate is used to seal the chute opened on the back of the infrared spectrometer body for the movement of the engaging tooth rack.

[0018] By adopting the above technical solution, the setting of the sealing plate can prevent the chute on the back of the infrared spectrometer body from being exposed, resulting in dust and other impurities in the outside world entering the inside of the spectrometer.

[0019] Preferably, the locking directions of the second one-way bearing and the first one-way bearing are opposite, and the linkage half gear outside the second one-way bearing is meshed with the engaging tooth rack, and the engaging tooth rack can slide on the infrared spectrometer body.

[0020] By adopting the above technical solution, the locking directions of the first one-way bearing and the second one-way bearing are opposite, so that when the transmission plug rod drives the filter disc to rotate through the first one-way bearing, the second one-way bearing will not drive the linkage half gear to rotate.

[0021] Preferably, the longitudinal section of the extrusion block is set as an isosceles trapezoid structure, and the inclined surface of the extrusion block can squeeze the inclined surface of the end of the pressure-receiving blocking rod after moving.

[0022] By adopting the above technical solution, the extrusion block can be moved to squeeze the pressure-receiving blocking rod, so that the pressure-receiving blocking rod drives the shielding block to move synchronously.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The filter self-switching infrared spectrometer can control the intensity and wavelength range of the light entering the spectrometer by adjusting the shielding area of the filter, thereby improving the measurement accuracy and precision. At the same time, it can shield the filters that are not needed. 1. A filter disc is provided. By rotating the transmission insertion rod, the one-way locking characteristic of the first one-way bearing can be utilized to drive the filter disc to rotate synchronously. By rotating the filter disc, the filter substrate can be driven to rotate synchronously, thereby realizing the automatic switching and adjustment of the filter substrate. 2. A shielding block is provided. Through the shielding block arranged on the surface of the filter substrate, the filter substrate is shielded and protected in the initial state, so as to provide dust protection for the filter substrate when the infrared spectrometer body is not working. At the same time, when the shielding block moves later, it can drive the cleaning cotton to move synchronously, and the movement of the cleaning cotton can be used to clean the dust attached to the surface of the filter substrate. 3. An air outlet is provided. After the extrusion block moves and squeezes the pressure-receiving blocking rod, the movement of the pressure-receiving blocking rod can drive the shielding block to move synchronously. After the shielding block moves on the limiting rod, the airflow inside the accommodating groove can be extruded out through the air outlet by the limiting rod. The airflow ejected from the air outlet towards the surface of the filter substrate can improve the cleaning effect on the filter substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front three-dimensional structure schematic diagram of the present invention; Figure 2 is a back three-dimensional structure schematic diagram of the present invention; Figure 3 is a structure schematic diagram of the filter disc and the protective shielding component of the present invention; Figure 4 is a structure schematic diagram of the filter disc and the filter substrate of the present invention; Figure 5 is a structure schematic diagram of the support side plate and the extrusion block of the present invention; Figure 6 is a structure schematic diagram of the shielding block and the cleaning cotton of the present invention; Figure 7 is of the present invention Figure 2 and is an enlarged structure schematic diagram at position A therein; Figure 8 is a structure schematic diagram of the shielding block and the air outlet of the present invention; Figure 9 is a structure schematic diagram of the accommodating groove and the limiting rod of the present invention.

[0025] In the figure: 1, the main body of the infrared spectrometer; 2, the protective cover; 3, the sample tray; 4, the supporting side plate; 5, the filter disc; 6, the first one-way bearing; 7, the transmission plug rod; 8, the positioning column; 9, the locking member; 10, the protective shielding component; 101, the shielding block; 102, the cleaning cotton; 103, the pressure-blocking rod; 104, the accommodating groove; 105, the limiting rod; 106, the air outlet; 107, the auxiliary spring; 11, the power opening and closing component; 111, the second one-way bearing; 112, the linkage half gear; 113, the connecting tooth rack; 114, the extrusion block; 115, the sealing plate; 12, the filter substrate. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1: Please refer to Figures 1-9, during the use of the existing infrared spectrometer, it is not convenient to shield and protect the remaining idle filters, resulting in the filters being exposed for a long time and dust and other impurities being easily attached to the surface, which affects the light transmittance during subsequent use. To solve this technical problem, the following technical content is disclosed in this embodiment. A filter self-switching infrared spectrometer includes an infrared spectrometer body 1 and a protective cover 2 installed on the infrared spectrometer body 1. A sample disk 3 is installed inside the infrared spectrometer body 1, and a support side plate 4 fixed to the infrared spectrometer body 1 is provided on the side of the sample disk 3. A filter disk 5 is installed in the middle of the support side plate 4, and a filter substrate 12 is connected to the filter disk 5. The middle of the filter disk 5 is connected to a transmission plug rod 7 through a first one-way bearing 6, and a positioning column 8 is fixed at the end of the transmission plug rod 7 away from the filter disk 5. A locking member 9 is inserted into the positioning column 8, and the bent portion on the locking member 9 is inserted into the hole on the back of the infrared spectrometer body 1. Protective shielding components 10 are installed on both sides of the front and back of the filter substrate 12 on the filter disk 5. The protective shielding components 10 are used for shielding and protecting the filter substrate 12 during the idle period. A power opening and closing component 11 for controlling the opening of the protective shielding component 10 is installed on the side of the support side plate 4. The filter disk 5 can rotate in the middle of the support side plate 4, and four filter substrates 12 are evenly distributed at equal angles on the filter disk 5, and the light filtering rates of each filter substrate 12 are different. The outer side of the positioning column 8 and the inner wall of the middle part of the locking member 9 are mutually attached, and the longitudinal section of the positioning column 8 is set as a rectangular structure, and the bent portion on the locking member 9 and the inner wall of the hole on the back of the infrared spectrometer body 1 are in agreement. The protective shielding component 10 includes a shielding block 101. A pressure receiving rod 103 is fixed to the side of the shielding block 101, and a receiving groove 104 is opened inside the shielding block 101. A limiting rod 105 is inserted into the receiving groove 104, and the limiting rod 105 is fixed on the filter disk 5. One end of the limiting rod 105 extending out of the receiving groove 104 is connected to the shielding block 101 through an auxiliary spring 107. The inner side of the end of the pressure receiving rod 103 away from the shielding block 101 is set as an inclined surface. The shielding blocks 101 are symmetrically arranged about the central axis of the filter substrate 12, and the symmetrically distributed shielding blocks 101 shield the filter substrate 12 in the initial state, and the cleaning cotton 102 on the shielding block 101 is in contact with the surface of the filter substrate 12. The power opening and closing component 11 includes a second one-way bearing 111 installed on the transmission plug rod 7, and a linkage half gear 112 rotatably connected to the back of the infrared spectrometer body 1 is installed on the outer side of the second one-way bearing 111. An engaging tooth rack 113 is provided on the outer side of the linkage half gear 112, and an extrusion block 114 is fixed at the end of the engaging tooth rack 113 away from the linkage half gear 112. A sealing plate 115 is installed on the engaging tooth rack 113, and the sealing plate 115 is used to seal the chute opened on the back of the infrared spectrometer body 1 for the movement of the engaging tooth rack 113. The locking directions of the second one-way bearing 111 and the first one-way bearing 6 are opposite.Moreover, the linkage half gear 112 outside the second one-way bearing 111 is in meshing connection with the connecting tooth rack 113. The connecting tooth rack 113 can slide on the infrared spectrometer body 1. The longitudinal section of the extrusion block 114 is set as an isosceles trapezoid structure, and the inclined surface of the extrusion block 114 can extrude the inclined surface at the end of the pressure-receiving stop rod 103 after moving.

[0028] When the infrared spectrometer body 1 is in use, open the protective cover 2. After the protective cover 2 is opened, place the sample on the sample tray 3 for detection. During the detection, the transmission plug rod 7 can be rotated reversely. Since the first one-way bearing 6 is in a reverse locking state, the transmission plug rod 7 can drive the filter disc 5 to rotate synchronously by using the first one-way bearing 6 after rotation. After the filter disc 5 rotates, the filter substrate 12 thereon can rotate synchronously, so as to replace the filter substrate 12 with different light filtration rates for use according to actual detection requirements. At the same time, in the initial state, the front and back sides of the filter substrate 12 are shielded by the shielding block 101. Therefore, when the infrared spectrometer body 1 does not need to work, the filter substrate 12 can be protected from dust by the shielding block 101. Since the locking direction of the second one-way bearing 111 is opposite to that of the first one-way bearing 6, when the filter disc 5 is rotated and adjusted, the rotation of the transmission plug rod 7 will not drive the linkage half gear 112 to rotate by using the second one-way bearing 111. When the corresponding filter substrate 12 rotates and switches in place, start to rotate the transmission plug rod 7 forward. The forward rotation of the transmission plug rod 7 is the active direction of the first one-way bearing 6. Therefore, the transmission plug rod 7 will not drive the filter disc 5 to rotate at this time. After the transmission plug rod 7 rotates forward, it can drive the linkage half gear 112 to rotate by using the second one-way bearing 111. After the linkage half gear 112 rotates, the meshing-connected connecting tooth rack 113 can drive the extrusion block 114 to move towards the center direction of the filter disc 5. After the extrusion block 114 moves, it can use the hypotenuse to extrude the hypotenuse of the pressure-receiving stop rod 103 on the side of the shielding block 101. After the pressure-receiving stop rod 103 is pressed, the shielding block 101 can move on the limiting rod 105. After moving, the shielding block 101 can release the shielding of the filter substrate 12, so that the filter substrate 12 can be used normally. After the adjustment is completed, insert the middle part of the locking member 9 into the positioning post 8 at the end of the transmission plug rod 7. At this time, the bent part of the locking member 9 is also inserted into the hole on the back of the infrared spectrometer body 1, so as to fix the position of the transmission plug rod 7. Example Two: The technical content disclosed in this example is a further improvement based on the above Example One. When the filter is switched, the adjustment is achieved by the rotation of the spectral disk. However, when the spectral disk is in use, it is not convenient to change the shielding area of the filter according to actual needs, which reduces the diverse requirements of the infrared spectrometer. At the same time, multiple filters are used for switching. The following technical content is disclosed in this example. An air outlet hole 106 is opened on the shielding block 101, and a plurality of air outlet holes 106 are evenly distributed on the shielding block 101. A cleaning cotton 102 is fixed on the side of the shielding block 101 facing the filter substrate 12. The outer wall of the end of the limiting rod 105 extending into the accommodating groove 104 is in contact with the inner wall of the accommodating groove 104, and a sealing ring is circumferentially wrapped around the end of the limiting rod 105 extending into the accommodating groove 104. And the accommodating groove 104 is communicated with the outside through the air outlet hole 106, and the air outlet end of the air outlet hole 106 is inclinedly opened towards the direction of the filter substrate 12.

[0029] After the shielding block 101 moves towards the outer side of the filter substrate 12, the movement of the shielding block 101 can drive the cleaning cotton 102 to move synchronously. By using the movement of the cleaning cotton 102, the dust and impurities attached to the surface of the filter substrate 12 can be cleaned. At the same time, after the shielding block 101 moves on the limiting rod 105, the movement of the shielding block 101 can use the limiting rod 105 to squeeze the air flow inside the accommodating groove 104 out through the air outlet hole 106. The air flow ejected out through the air outlet hole 106 can improve the cleaning effect on the filter substrate 12. And the shielding block 101 is in a moving state, so the movement of the shielding block 101 can make the air outlet hole 106 jet air towards different positions of the filter substrate 12. At the same time, the movement of the connecting tooth rack 113 can control the movement of the extrusion block 114. By using the change in the moving distance of the extrusion block 114, the moving distance of the shielding block 101 can be controlled. Since the shielding block 101 is located on the side of the filter substrate 12, the amount of the moving distance of the shielding block 101 determines the shielding area of the filter substrate 12. In order to facilitate the limiting of the driving insertion rod 7 when it rotates to multiple angles, a plurality of holes can be opened on the back of the infrared spectrometer body 1 to facilitate the insertion of the bent portion on the locking member 9.

[0030] The content not described in detail in this specification belongs to the well-known prior art of those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An infrared spectrometer with self-switching filters, comprising an infrared spectrometer body (1) and a protective cover (2) mounted on the infrared spectrometer body (1). A sample disk (3) is installed inside the infrared spectrometer body (1), and a support side plate (4) fixed to the infrared spectrometer body (1) is provided on the side of the sample disk (3). A filter disk (5) is installed in the middle of the support side plate (4), and a filter substrate (12) is connected to the filter disk (5), characterized in that: The middle part of the filter disc (5) is connected with a transmission plug rod (7) through a first one-way bearing (6), and a positioning column (8) is fixed at one end of the transmission plug rod (7) away from the filter disc (5). A locking member (9) is inserted on the positioning column (8), and the bent part on the locking member (9) is inserted into the hole on the back of the infrared spectrometer body (1). Protective shielding components (10) are installed on both sides of the front and back of the filter substrate (12) on the filter disc (5). The protective shielding components (10) are used for shielding and protecting the filter substrate (12) during the idle period. A power opening and closing component (11) for controlling the opening of the protective shielding component (10) is installed on the side of the support side plate (4).

2. The filter self-switching infrared spectrometer according to claim 1, wherein: The filter disc (5) can rotate in the middle of the support side plate (4), and four filter substrates (12) are evenly distributed at equal angles on the filter disc (5), and the light filtering rates of each filter substrate (12) are different.

3. The self-switching infrared spectrometer with a filter according to claim 1, characterized in that: The outer side of the positioning column (8) and the inner wall of the middle part of the locking member (9) are mutually attached. The longitudinal section of the positioning column (8) is set as a rectangular structure, and the bent part on the locking member (9) coincides with the inner wall of the hole on the back of the infrared spectrometer body (1).

4. The infrared spectrometer with self-switching filter according to claim 1, wherein: The protective shielding component (10) includes a shielding block (101), and a cleaning cotton (102) is fixed on one side of the shielding block (101) facing the filter substrate (12). A pressure-receiving rod (103) is fixed on the side of the shielding block (101), and a receiving groove (104) is opened inside the shielding block (101). A limiting rod (105) is inserted into the receiving groove (104), and the limiting rod (105) is fixed on the filter disc (5). One end of the limiting rod (105) extending out of the receiving groove (104) is connected with the shielding block (101) through an auxiliary spring (107), and an air outlet hole (106) is opened on the shielding block (101). The inner side of one end of the pressure-receiving rod (103) away from the shielding block (101) is set as an inclined surface.

5. The self-switching infrared spectrometer with a filter according to claim 4, characterized in that: The shielding blocks (101) are symmetrically arranged about the central axis of the filter substrate (12). The symmetrically distributed shielding blocks (101) shield the filter substrate (12) in the initial state, and the cleaning cotton (102) on the shielding block (101) is mutually attached to the surface of the filter substrate (12).

6. The filter self-switching infrared spectrometer according to claim 4, wherein: The outer wall of one end of the limiting rod (105) extending into the receiving groove (104) is mutually attached to the inner wall of the receiving groove (104). A sealing ring is circumferentially wrapped around one end of the limiting rod (105) extending into the receiving groove (104), and the receiving groove (104) is communicated with the outside through the air outlet hole (106). The air outlet end of the air outlet hole (106) is inclinedly opened towards the direction of the filter substrate (12).

7. A filter self-switching infrared spectrometer according to claim 4, characterized in that: The power opening and closing component (11) includes a second one-way bearing (111) installed on the transmission plug rod (7), and a linkage half gear (112) rotatably connected to the back of the infrared spectrometer body (1) is installed on the outer side of the second one-way bearing (111). An engagement tooth rack (113) is arranged on the outer side of the linkage half gear (112), and a pressing block (114) is fixed at one end of the engagement tooth rack (113) away from the linkage half gear (112). A sealing plate (115) is installed on the engagement tooth rack (113), and the sealing plate (115) is used to seal a sliding groove opened on the back of the infrared spectrometer body (1) for the movement of the engagement tooth rack (113).

8. The self-switching infrared spectrometer with a filter according to claim 7, characterized in that: The locking directions of the second one-way bearing (111) and the first one-way bearing (6) are opposite, and the linkage half gear (112) on the outer side of the second one-way bearing (111) is meshed with the engagement tooth rack (113), and the engagement tooth rack (113) can slide on the infrared spectrometer body (1).

9. The infrared spectrometer with self-switching filter according to claim 7, wherein: The longitudinal section of the pressing block (114) is arranged in an isosceles trapezoid structure, and the inclined surface of the pressing block (114) can press the inclined surface at the end of the pressure receiving stop rod (103) after moving.

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