An auto-focusing portable infrared spectrometer

Abstract

The utility model discloses a portable infrared spectrometer of automatic focusing belongs to portable infrared spectrometer field, including the spectrograph body, motor support, identification screen, magnetic attraction base, positioning clamping slot, the inside installation of spectrograph body has focusing mechanism, focusing mechanism includes drive motor, ball screw, planetary gear set, bearing seat, deep groove ball bearing, sliding block, guide rail seat, linear guide rail, limit switch, and one end of drive motor is connected with ball screw, and the outside of ball screw is installed planetary gear set, bearing seat and sliding block from left to right in proper order, and bearing seat is set up with through -hole, and deep groove ball bearing is installed in through -hole, and bearing seat is connected with ball screw through deep groove ball bearing, and the both sides symmetrical installation of ball screw has guide rail seat, and the top of guide rail seat is connected with linear guide rail, and the both sides installation of linear guide rail has limit switch, and through above -mentioned each device between the cooperation use, makes the focusing process more smooth.

Description

Technical Field

[0001] This utility model relates to the field of portable infrared spectrometer technology, specifically an autofocus portable infrared spectrometer. Background Technology

[0002] Infrared spectroscopy is an important analytical technique that is widely used in fields such as chemistry, materials science, pharmaceuticals, and environmental monitoring.

[0003] The autofocus structure of traditional portable infrared spectrometers has some limitations in practical applications. Early methods mostly used manual adjustment or simple direct motor drive. Manual adjustment relies on the operator's experience, which is not only inefficient but also difficult to guarantee focusing accuracy. Especially in complex environments such as the field, the operation is unstable. Although simple direct motor drive achieves automation, the limited output torque of the motor makes it prone to jamming or insufficient displacement accuracy when moving components such as the lens due to load changes.

[0004] Therefore, this invention provides a portable infrared spectrometer with autofocus to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a portable infrared spectrometer with autofocus, which aims to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a portable infrared spectrometer with automatic focusing, comprising a spectrometer body, a motor bracket, an identification screen, a magnetic base, and a positioning slot. The spectrometer body has a focusing mechanism installed inside. The focusing mechanism includes a drive motor, a ball screw, a planetary gear set, a bearing housing, a deep groove ball bearing, a slider, a guide rail seat, a linear guide rail, and limit switches. One end of the drive motor is connected to the ball screw. From left to right, a planetary gear set, a bearing housing, and a slider are sequentially installed on the outer side of the ball screw. The bearing housing has a through hole, and a deep groove ball bearing is installed inside the through hole. The bearing housing is connected to the ball screw via the deep groove ball bearing. Guide rail seats are symmetrically installed on both sides of the ball screw. A linear guide rail is connected to the top of the guide rail seats, and limit switches are installed on both sides of the linear guide rail.

[0009] As a preferred technical solution of this application, a lens mount is installed above the ball screw, a through hole is opened on the surface of the lens mount, a focusing lens is installed in the through hole, and a T-shaped groove is opened on the surface of the lens mount, and a linear guide rail slides freely in the groove.

[0010] As a preferred technical solution of this application, a folding grip mechanism is installed at the bottom of the spectrometer body. The folding grip mechanism includes a grip body, a damping hinge, a second locking block, a permanent magnet, and a first locking block. The damping hinge and the second locking block are installed at the top of the grip body, and the second locking block is installed on the left side of the damping hinge.

[0011] As a preferred technical solution of this application, a permanent magnet and a first card block are installed on one side of the grip body, with the permanent magnet located above the first card block.

[0012] As a preferred technical solution of this application, a motor bracket is installed inside the spectrometer body. A cylindrical groove is opened on one side of the motor bracket, and a drive motor is installed in the groove. The bottom of the motor bracket is connected to a bearing seat and a guide rail seat.

[0013] As a preferred technical solution of this application, the bottom of the spectrometer body is provided with a magnetic base and a positioning slot, the positioning slot including a first slot and a second slot, the first slot being located in front of the second slot.

[0014] As a preferred technical solution of this application, the size of the permanent magnet is matched with the magnetic base, and the second card block and the first card block are matched with the second card slot and the first card slot, respectively.

[0015] (III) Beneficial Effects

[0016] The focusing mechanism employs a combination of planetary gear sets and ball screws for transmission. The planetary gear sets achieve efficient speed reduction and torque increase through a reasonable tooth ratio, converting the high-speed, low-torque motor into low-speed, high-torque power. This ensures sufficient power when driving components such as the lens, preventing jamming. The ball screw and slider utilize a helical transmission, replacing sliding friction with rolling friction of the balls, significantly reducing transmission resistance and making the focusing process smoother. It also effectively reduces return error. Combined with the directional constraint of the linear guide rail, it significantly improves the accuracy of lens displacement, meeting the requirements of high-precision spectral detection for focus stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a portable infrared spectrometer with autofocus;

[0018] Figure 2 This is a schematic diagram of the spectrometer body in a portable infrared spectrometer with autofocus.

[0019] Figure 3 This is a schematic diagram of the focusing mechanism in a portable infrared spectrometer with autofocus.

[0020] Figure 4 This is a schematic diagram of the folding grip mechanism in a portable infrared spectrometer with autofocus.

[0021] Figure 5 This is an enlarged view of the focusing mechanism in a portable infrared spectrometer with autofocus.

[0022] In the picture:

[0023] 1. Spectrometer body; 2. Motor bracket; 3. Identification screen; 4. Magnetic base; 5. Positioning slot; 501. Slot 1; 502. Slot 2; 6. Folding grip mechanism; 601. Grip body; 602. Damping hinge; 603. Slot 2; 604. Permanent magnet; 605. Slot 1; 7. Focusing mechanism; 701. Drive motor; 702. Ball screw; 703. Planetary gear set; 704. Bearing housing; 705. Deep groove ball bearing; 706. Slider; 707. Guide rail base; 708. Linear guide rail; 709. Limit switch; 8. Lens mount; 801. Focusing lens. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides a portable infrared spectrometer with automatic focusing, including an identification screen 3, a folding grip mechanism 6, and a focusing mechanism 7. The drive motor 701 is a hollow cup DC motor, which is embedded in the cylindrical groove of the motor bracket 2 and locked with screws. The motor output shaft faces to the right. The sun gear of the planetary gear set 703 is interference-fitted with the output shaft of the drive motor 701. The internal gear ring is inserted into the annular groove of the motor bracket 2. The output shaft of the gear set is connected to the input end of the ball screw 702 through a flexible coupling. A deep groove ball bearing 705 is embedded in the through hole in the middle of the bearing seat 704. The ball screw 702 passes through the inner ring of the bearing. The bearing seat 704 is fixed to the bottom of the motor bracket 2 with screws, and the axis is coaxial with the motor axis.

[0026] The slider 706 is a ball nut structure, rigidly connected to the lens mount 8 on the side by screws. The guide rail seat 707 is an L-shaped aluminum alloy part, symmetrically installed on both sides of the ball screw 702. The top is fixed with screws to the linear guide rail 708. The limit switch 709 is a miniature photoelectric switch, which is fixed to the guide rail seat 707 at both ends of the linear guide rail 708 by screws. The trigger piece is 1mm away from the edge of the lens mount 8. The lens mount 8 is made of aluminum alloy. The focusing lens 801 is pressed into the top through hole and locked with radial set screws. A T-shaped groove is opened at the bottom of the lens mount 8. The linear guide rail 708 is embedded in the groove to ensure that the lens mount 8 slides smoothly and without obstruction when sliding along the guide rail. The optical axis of the lens is coaxial with the axis of the ball screw 702.

[0027] The grip body 601 has an arc-shaped structure and is made of high-strength nylon. The top is hinged to the bottom of the spectrometer body 1 via a damping hinge 602. A second locking block 603 is installed on the top left side of the grip body 601, and a first locking block 605 is installed at the corresponding position on the bottom. This locking block is the same specification as the second locking block 603. A permanent magnet 604 is embedded above the first locking block 605. This magnet matches the magnetic base 4. In the storage state, the grip body 601 rotates around the damping hinge 602 until it fits against the body. The permanent magnet 604 is attracted to the magnetic base 4, and the first locking block 605 is inserted into the first locking slot 501. In the use state, the grip is rotated to 90°, and the second locking block 603 is inserted into the second locking slot 502 to achieve positioning.

[0028] Working principle: The drive motor 701 serves as the power source, outputting high-speed rotational motion after startup. The motor output shaft drives the sun gear of the planetary gear set 703 to rotate synchronously through an interference fit. The sun gear meshes with the three planet gears, which simultaneously roll along the internal gear ring. The power is transmitted to the gear set output shaft through the planet carrier, converting the high-speed, low-torque motion of the motor into low-speed, high-torque output, providing sufficient driving force for subsequent transmission. The rotational motion is transmitted to the ball screw 702, causing the screw to rotate around its own axis. The ball screw 702 and the slider 706 form a helical transmission pair, driving the slider 706 to move linearly along the screw axis. The deep groove ball bearing 705 provides radial positioning for the ball screw 702, ensuring the stability of the axis when the screw rotates and preventing the slider 706 from shaking due to eccentric rotation.

[0029] The slider 706 is rigidly connected to the lens mount 8 by screws, which drives the lens mount 8 to move in a straight line synchronously. The T-slot at the bottom of the lens mount 8 forms a sliding fit with the linear guide rail 708. The linear guide rail 708 constrains the movement direction of the lens mount 8 to avoid radial offset from affecting the stability of the optical path. The focusing lens 801 at the top of the lens mount 8 moves synchronously with the mount body. Focusing is achieved by adjusting the distance between the lens and the sample.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable infrared spectrometer with autofocus, comprising a spectrometer body (1), a motor bracket (2), an identification screen (3), a magnetic base (4), and a positioning slot (5), characterized in that: The focusing mechanism (7) is installed inside the spectrometer body (1). The focusing mechanism (7) includes a drive motor (701), a ball screw (702), a planetary gear set (703), a bearing housing (704), a deep groove ball bearing (705), a slider (706), a guide rail seat (707), a linear guide rail (708), and a limit switch (709). One end of the drive motor (701) is connected to the ball screw (702), and the planetary gear set (703) is installed sequentially from left to right on the outer side of the ball screw (702). The bearing housing (704) and the slider (706) are provided. The bearing housing (704) has a through hole and a deep groove ball bearing (705) is installed in the through hole. The bearing housing (704) is connected to the ball screw (702) through the deep groove ball bearing (705). Guide rail seats (707) are symmetrically installed on both sides of the ball screw (702). A linear guide rail (708) is connected to the top of the guide rail seat (707). Limit switches (709) are installed on both sides of the linear guide rail (708).

2. The portable infrared spectrometer with autofocus according to claim 1, characterized in that: A lens mount (8) is installed above the ball screw (702). A through hole is provided on the surface of the lens mount (8), and a focusing lens (801) is installed in the through hole. A T-groove is provided on the surface of the lens mount (8), and a linear guide rail (708) slides freely in the groove.

3. The portable infrared spectrometer with autofocus according to claim 1, characterized in that: The bottom of the spectrometer body (1) is equipped with a folding grip mechanism (6). The folding grip mechanism (6) includes a grip body (601), a damping hinge (602), a second locking block (603), a permanent magnet (604), and a first locking block (605). The top of the grip body (601) is equipped with a damping hinge (602) and a second locking block (603). The second locking block (603) is installed on the left side of the damping hinge (602).

4. The portable infrared spectrometer with autofocus according to claim 3, characterized in that: A permanent magnet (604) and a first card block (605) are installed on one side of the grip body (601), with the permanent magnet (604) located above the first card block (605).

5. The portable infrared spectrometer with autofocus according to claim 1, characterized in that: The spectrometer body (1) has a motor bracket (2) installed inside. A cylindrical groove is provided on one side of the motor bracket (2), and a drive motor (701) is installed in the groove. The bottom of the motor bracket (2) is connected to the bearing seat (704) and the guide rail seat (707).

6. The portable infrared spectrometer with autofocus according to claim 1, characterized in that: The bottom of the spectrometer body (1) is provided with a magnetic base (4) and a positioning slot (5). The positioning slot (5) includes a first slot (501) and a second slot (502). The first slot (501) is located in front of the second slot (502).

7. The portable infrared spectrometer with autofocus according to claim 3, characterized in that: The size of the permanent magnet (604) matches the magnetic base (4), and the second card block (603) and the first card block (605) match the second card slot (502) and the first card slot (501) respectively.

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