A portable ultraviolet spectrophotometer

Abstract

The utility model discloses a portable ultraviolet spectrophotometer, including the box, its inside is provided with the inner casing, be provided with the reinforcing shell between the four corners of the box inside and the four corners of inner casing, any one reinforcing shell all is provided with the positioning hole, is located the both sides of the box inner wall and is provided with the limiting jack, and the box outside is equipped with the handle, spectrophotometer body, its installation in the inner casing, the cover plate, its detachable connection on the box, the cover plate is equipped with rotatable operating knob, the lower extreme of cover plate is provided with a plurality of with the positioning hole one -to -one corresponding positioning column, the lower extreme of cover plate still is provided with the limiting plate against the symmetry of. The utility model has the advantages of: solve the technical problem of the poor portability of ultraviolet spectrophotometer in the prior art, and its own do not have corresponding protection effect, lead to the precise component long -time exposure, easy to cause the influence of its precision.

Description

Technical Field

[0001] This utility model relates to the field of ultraviolet spectrophotometer technology, specifically to a portable ultraviolet spectrophotometer. Background Technology

[0002] A spectrophotometer, also known as a spectrometer, is a scientific instrument that breaks down complex light into spectral lines. Its measurement range generally includes the visible light region (380–780 nm) and the ultraviolet light region (200–380 nm). However, existing ultraviolet spectrophotometers still have significant limitations in use, especially in scenarios requiring mobile or on-site testing. The protection of portable devices is particularly critical. On one hand, during transport, key components such as the display screen, control buttons, and measurement chamber are easily subjected to external pressure or impact, leading to damage or even failure, severely impacting reliability and lifespan. On the other hand, these precision components are easily exposed to dust, affecting not only appearance but also potentially penetrating the instrument's interior, interfering with the optical system or circuitry, resulting in decreased measurement accuracy or malfunction. Furthermore, the device generates heat during operation; poor heat dissipation can also affect performance stability and long-term reliability. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a portable ultraviolet spectrophotometer, which solves the technical problem that the existing ultraviolet spectrophotometers are not portable and do not have corresponding protective effects, resulting in the long-term exposure of precision components, which can easily affect their accuracy.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model provides a portable ultraviolet spectrophotometer, comprising:

[0006] The chassis has an inner shell inside, and a reinforcing shell is provided between the four corners of the chassis and the four corners of the inner shell. Each of the reinforcing shells has a positioning hole. Limiting holes are provided on both sides of the inner wall of the chassis, and a handle is installed on the outside of the chassis.

[0007] The spectrophotometer body is installed inside the inner housing;

[0008] A cover plate is detachably connected to the chassis. A rotatable operating knob is installed on the cover plate. Several positioning pins corresponding to the positioning holes are provided at the lower end of the cover plate. Limiting plates are also symmetrically arranged below the cover plate.

[0009] The engaging structure includes a transmission end, a pushing end, and a movable plate; the transmission end is connected to the operating knob via a shaft, and the pushing end is hinged to the transmission end. The end of the pushing end is used to push the movable plate to move towards the limiting plate below the cover plate, and to extend the limiting pin on the movable plate into the limiting hole.

[0010] In some embodiments, adjacent reinforcing shells form a cavity within the chassis, the cavity being filled with shock-absorbing foam.

[0011] In some embodiments, the lower end of the cover plate is provided with two sliding grooves, and the movable plate is slidably connected in the sliding grooves.

[0012] In some embodiments, the operation knob is provided with an indicator arrow, and a through hole is provided on the limiting plate for the limiting pin to pass through.

[0013] In some embodiments, a shielding plate for shielding the transmission end is provided below the cover plate, and a flexible layer is adhered to the side of the shielding plate facing the spectrophotometer body.

[0014] In some embodiments, the transmission end includes a main gear, a first auxiliary gear, and a second auxiliary gear. The main gear is connected to the operating knob via a shaft, and the first auxiliary gear and the second auxiliary gear are respectively meshed on both sides of the main gear. The first auxiliary gear and the second auxiliary gear are both connected to the bottom of the cover plate via a rotating shaft, and the pushing end is hinged to both the first auxiliary gear and the second auxiliary gear.

[0015] In some embodiments, the first auxiliary gear is provided with a first protrusion, the second auxiliary gear is provided with a second protrusion, the pushing end includes a first movable push rod and a second movable push rod, the first movable push rod is hinged to the first protrusion, the second movable push rod is hinged to the second protrusion, and the ends of the first movable push rod and the second movable push rod are both hinged to the movable plate.

[0016] In some embodiments, the movable plate includes a first plate and a second plate, both of which are slidably connected within the groove. The end of the first movable push rod is hinged to the first plate, and the end of the second movable push rod is hinged to the second plate. Limit pins are connected to opposite sides of both the first and second plates.

[0017] In some embodiments, both the first plate and the second plate are provided with elastic elements on the side facing the limiting plate, and the elastic elements include spring dampers.

[0018] In some embodiments, the height of the reinforcing shell is greater than the height of the inner shell.

[0019] Compared with existing technologies, the portable ultraviolet spectrophotometer provided by this utility model has a reliable mechanical locking mechanism constructed through a snap-fit ​​structure. The mechanical connection of the limiting pin inserting into the limiting hole provides a physical locking force far exceeding that of buckles or magnetic attraction, effectively resisting vibration, bumps, and even slight compression during transportation. This ensures that the cover will not be accidentally opened when not in use, providing robust physical protection for the internal spectrophotometer body. Furthermore, this locking method places the connection point between the cover and the chassis on the reinforced shell inside the chassis, rather than on the weak edge of the chassis, greatly enhancing the strength and stability of the connection point. This application also includes an inner shell inside the chassis, with additional features between the four corners of the chassis and the four corners of the inner shell. The reinforced shell forms a stable structure, essentially creating a reinforced frame inside the enclosure. This significantly improves the overall structural strength and resistance to pressure and bending. When the equipment is subjected to external impact, the force is effectively dispersed through the reinforced shell, preventing localized deformation of the enclosure and thus better protecting the internal equipment. The reinforced shell itself is highly strong, and users only need to rotate the operating knob on the cover to drive the entire locking structure, completing the extension and retraction of the limit pin. Compared to the traditional method that requires two hands or searching for multiple latches, single-knob operation is more labor-saving and faster. Users can open and close the equipment with one hand, making it especially suitable for use outdoors or in environments where operation is inconvenient, such as when wearing gloves. A handle is installed on the outside of the enclosure for easy carrying. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the handle assembly of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing the unfolded chassis and cover of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the locking structure of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the transmission end structure of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention;

[0025] Figure 6 This is a bottom view of the cover plate of the portable ultraviolet spectrophotometer provided in this embodiment of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Chassis; 11. Inner shell; 12. Reinforcing shell; 121. Positioning hole; 13. Limiting insertion hole; 14. Chamber; 15. Handle; 2. Spectrophotometer body; 3. Cover plate; 300. Slide groove; 31. Operating knob; 311. Marking arrow; 32. Positioning post; 33. Limiting plate; 331. Through hole; 34. Baffle plate; 4. Engaging structure; 41. Transmission end; 411. Main gear; 412. First auxiliary gear; 4121. First protrusion; 413. Second auxiliary gear; 4131. Second protrusion; 42. Pushing end; 421. First movable push rod; 422. Second movable push rod; 43. Movable plate; 431. First plate; 432. Second plate; 44. Limiting pin; 45. Elastic element; 451. Spring damper. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] To address the technical problems of poor portability and lack of protection in existing ultraviolet spectrophotometers, which lead to prolonged exposure of precision components and affect their accuracy, this invention provides a portable ultraviolet spectrophotometer that achieves portability while extending its service life for outdoor use.

[0029] It should be noted that the portable ultraviolet spectrophotometer described in this utility model is used in, but not limited to, the field of ultraviolet spectrophotometers. For ease of explanation, this utility model only uses the application of the portable ultraviolet spectrophotometer in the field of ultraviolet spectrophotometers as an example for explanation. The principle of the portable ultraviolet spectrophotometer in other types of equipment is essentially the same as the principle in the field of ultraviolet spectrophotometers, and will not be described in detail here.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a portable ultraviolet spectrophotometer according to one embodiment of the present invention. A portable ultraviolet spectrophotometer includes:

[0031] The chassis 1 has an inner shell 11 inside. Reinforcing shells 12 are provided between the four corners of the chassis 1 and the four corners of the inner shell 11. Each reinforcing shell 12 has a positioning hole 121. Limiting insertion holes 13 are provided on both sides of the inner wall of the chassis 1. A handle 15 is installed on the outside of the chassis 1.

[0032] The spectrophotometer body 2 is installed inside the inner housing 11;

[0033] Cover plate 3 is detachably connected to chassis 1. A rotatable operating knob 31 is mounted on cover plate 3. Several positioning pins 32, corresponding one-to-one with positioning holes 121, are provided at the lower end of cover plate 3. Limiting plates 33 are also symmetrically arranged below cover plate 3.

[0034] The engaging structure 4 includes a transmission end 41, a pushing end 42, and a movable plate 43. The transmission end 41 is connected to the operating knob 31 via a shaft, and the pushing end 42 is hinged to the transmission end 41. The end of the pushing end 42 is used to push the movable plate 43 to move towards the limiting plate 33 below the cover plate 3, and to extend the limiting pin 44 on the movable plate 43 into the limiting insertion hole 13.

[0035] In this embodiment, the device constructs a reliable mechanical locking mechanism through the locking structure 4. The mechanical connection of the limiting pin 44 into the limiting socket 13 provides a physical locking force far exceeding that of buckles or magnetic attraction, effectively resisting vibration, bumps, and even slight squeezing during transportation. This ensures that the cover 3 will not be accidentally opened when not in use, providing robust physical protection for the internal spectrophotometer body 2. Furthermore, this locking method places the connection point between the cover 3 and the chassis 1 on the reinforcing shell 12 inside the chassis 1, rather than on the weak edge of the chassis, greatly enhancing the strength and stability of the connection point. This application provides an inner shell 11 inside the chassis 1, and reinforcing shells 12 are provided between the four corners of the chassis 1 and the four corners of the inner shell 11. This constitutes a stable structure, which is equivalent to building a reinforced frame inside the enclosure, significantly improving the structural strength and resistance to pressure and bending of the entire enclosure 1. When the equipment is subjected to external impact, the force can be effectively dispersed through the reinforced shell 12, avoiding local deformation of the enclosure 1, thereby better protecting the internal equipment. Users only need to rotate the operating knob 31 on the cover plate 3 to drive the entire locking structure 4 and complete the extension and retraction of the limit pin 44. Compared with the traditional method that requires two hands to operate or to find multiple buckles, single knob operation is more labor-saving and faster. Users can open and close the equipment with one hand, which is especially suitable for use in outdoor or in environments where it is inconvenient to operate, such as when wearing gloves. The enclosure 1 is equipped with a handle 15 on the outside for easy carrying.

[0036] In one embodiment, please refer to Figure 1 - Figure 3 To enhance the shock resistance inside the chassis 1, adjacent reinforcing shells 12 form a chamber 14 inside the chassis 1. The chamber 14 is filled with shock-absorbing sponge. Below the cover plate 3, a shielding plate 34 is also provided to shield the transmission end 41. A flexible layer is bonded to the side of the shielding plate 34 facing the spectrophotometer body 2.

[0037] In this embodiment, by setting up a shock-absorbing sponge-filled chamber 14 and a shielding plate 34 with a flexible layer, multi-layered and all-round protection is achieved, from external structural protection to internal buffering and shock absorption, and then to close protection of precision components. This significantly improves the reliability, accuracy stability, and service life of the portable ultraviolet spectrophotometer in complex operating environments. The chamber 14 is a closed or semi-closed space naturally formed inside the chassis 1 by adjacent reinforcing shells 12. The chamber 14 is filled with shock-absorbing sponge, which is a flexible material with high elasticity, low density, and porous structure. It can effectively absorb and dissipate mechanical energy. During the carrying, transportation, or field use of the instrument, it is inevitable that the shock-absorbing sponge will be filled with shock-absorbing sponge. When encountering bumps, drops, or collisions, the shock-absorbing foam acts as an internal cushioning pad, quickly absorbing and dispersing these externally applied vibrations and impacts, preventing them from being directly transmitted to the spectrophotometer body 2 installed inside the inner housing 11. The core of the ultraviolet spectrophotometer is a precision optical system and sensitive electronic circuits. These components are extremely sensitive to mechanical stress. The cushioning effect of the shock-absorbing foam can effectively prevent minor damage to the optical components. At the same time, it eliminates the need for additional complex structures, achieving efficient use of space and integration of functions, reflecting the economy and rationality of the structural design. An independent shielding plate 34 is set below the cover plate 3, whose main function is to cover and protect the interior of the cover plate 3. The transmission end 41 of the cover plate 34 has a flexible layer bonded to the side facing the spectrophotometer body 2, i.e., the side facing the interior of the instrument. This flexible layer is usually made of soft, non-conductive, and non-corrosive materials such as silicone, rubber, or soft foam. When the cover plate 3 is closed, the cover plate 34 and its flexible layer will be closest to or even slightly in contact with the surface of the spectrophotometer body 2, such as the display screen, control panel, or housing. The soft flexible layer acts as a protective pad, effectively preventing the metal or hard plastic parts inside the cover plate 3, such as gears or push rods, from making hard contact with the spectrophotometer body 2 during vibration, thereby preventing scratches, wear, or indentations on the precision surfaces. At the same time, the flexible layer has a certain degree of elasticity. The cover plate 3 can provide a slight compression buffer when it is closed, further absorbing minor impacts from above. It can also form a soft sealing strip between the cover plate 3 and the instrument body, which helps to block the intrusion of fine dust and improve the dustproof effect. The shield plate 34 itself covers the complex transmission end 41, preventing external foreign objects such as dust, liquid, and fingers from accidentally entering and jamming or damaging these delicate linkage components, ensuring the long-term smooth operation of the locking structure 4. The shield plate 34 makes the structure inside the cover plate 3 neater and more beautiful. Its adhesive flexible layer is a non-conductive material, which can reduce the risk of short circuit due to accidental contact even in humid environments, thus improving the safety of use.

[0038] In one embodiment, please refer to Figure 1 - Figure 4 To prevent the transmission end 41 from touching the instrument, the height of the reinforcing shell 12 is higher than the height of the inner shell 11.

[0039] In this embodiment, if the height of the reinforcing shell 12 is lower than that of the inner shell 11, then when the cover plate 3 is placed on the inner shell 11, the top of the reinforcing shell 12 will be completely blocked by the cover plate 3 or the inner shell 11. The positioning pin 32 on the cover plate 3 will not be able to contact the reinforcing shell 12, let alone insert into the positioning hole 121. Therefore, the reinforcing shell 12 being higher than the inner shell 11 is an absolutely necessary condition to ensure that the precise pre-positioning action of the positioning pin 32 can be inserted into the positioning hole 121. The pre-positioning of the cover plate 3 is the basis for the subsequent locking action, that is, rotating the operation knob 31 to push the limit pin 44 into the limit insertion hole 13 on the inner wall of the chassis 1. Only through the cooperation of the positioning pin 32 and the positioning hole 121 of the reinforcing shell 12 can the cover plate 3 be precisely fixed in the correct position, ensuring that the transmission end 41, the pushing end 42 and the movable plate 43 in the locking structure 4 are in the correct initial state. This ensures the rotation operation When knob 31 is turned, push end 42 can accurately push movable plate 43, so that limit pin 44 is precisely aligned with and inserted into limit insertion hole 13 on inner wall of chassis 1. This avoids problems such as locking mechanism jamming, damage or insecure locking caused by misalignment of cover plate 3. After cover plate 3 is closed, its edge will directly rest on the top plane of reinforcing shell 12 which is higher than inner shell 11. This support structure makes the force distribution of cover plate 3 more reasonable, effectively disperses the pressure borne by cover plate 3, and prevents cover plate 3 from being suspended, bent or local stress concentration that may occur due to only being supported by inner shell 11. This improves the rigidity and stability of cover plate 3 and the entire chassis 1 structure. When the equipment is subjected to external impact, the force transmitted from cover plate 3 to inner wall of chassis 1 through reinforcing shell 12 is more direct and stable. The reinforcing shell 12 as a skeleton can play a full role in strengthening and effectively protects the internal spectrophotometer body 2.

[0040] In one embodiment, please refer to Figure 1 - Figure 6To improve the engagement efficiency of the engagement structure 4, two sliding grooves 300 are provided at the lower end of the cover plate 3. A movable plate 43 is slidably connected in the sliding grooves 300. An arrow 311 is provided on the operating knob 31. A through hole 331 for the limiting pin 44 to pass through is provided on the limiting plate 33. The transmission end 41 includes a main gear 411, a first auxiliary gear 412, and a second auxiliary gear 413. The main gear 411 is connected to the operating knob 31 through a shaft, and the first auxiliary gear 412 and the second auxiliary gear 413 are respectively meshed on both sides of the main gear 411. The first auxiliary gear 412 and the second auxiliary gear 413 are both connected to the lower part of the cover plate 3 through a rotating shaft. A pushing end 42 is hinged to both the first auxiliary gear 412 and the second auxiliary gear 413. The first auxiliary gear 412 has a first protrusion 4121, and the second auxiliary gear 413 has a second protrusion 4131. The pushing end 42 includes a first movable push rod 421 and a... The second movable push rod 422 is hinged to the first protrusion 4121 and the second movable push rod 422 is hinged to the second protrusion 4131. The ends of both the first and second movable push rods 421 and 422 are hinged to a movable plate 43. The movable plate 43 includes a first plate 431 and a second plate 432, both of which are slidably connected within a groove 300. The end of the first movable push rod 421 is hinged to... On the first plate 431, the end of the second movable push rod 422 is hinged to the second plate 432. The opposite sides of the first plate 431 and the second plate 432 are connected to limit pins 44. The side of the first plate 431 and the second plate 432 facing the limit plate 33 is provided with an elastic element 45, which includes a spring damper 451. The side of the first plate 431 and the second plate 432 facing the limit plate 33 is provided with a spring damper 451.

[0041] In this embodiment, the main gear 411 is coaxially connected to the operating knob 31 via a shaft. The first auxiliary gear 412 and the second auxiliary gear 413 mesh simultaneously on both sides. When the operating knob 31 is rotated, the main gear 411 drives the two auxiliary gears to rotate synchronously in opposite directions. The first protrusion 4121 and the second protrusion 4131 on each auxiliary gear are respectively hinged to a first movable push rod 421 and a second movable push rod 422. The other end of the push rod is hinged to the corresponding first plate 431 and second plate 432. The two movable plates 43 slide within the two grooves 300 at the lower end of the cover plate 3. The gear meshing transmission has extremely high synchronization accuracy. The main gear 411 simultaneously drives the two auxiliary gears, ensuring that the movable push rods on both sides rotate at the same time. The movement begins at the same angular velocity, ensuring the synchronous extension or retraction of the two movable plates 43 and the limiting pins 44. The symmetrical dual-sided drive avoids the problems of cover plate 3 tilting, asynchronous locking, or overload on one side that may occur with traditional single-sided drive. The entire cover plate 3 experiences uniform force and smooth movement, greatly improving the operating feel and long-term structural reliability. Gear transmission efficiently distributes the rotational torque to both sides. The compact structure occupies little space, making it suitable for movement within the limited internal space of the cover plate 3. The slide groove 300 provides precise guidance for the linear movement of the movable plate 43, forcing it to move only along the direction of the slide groove 300, i.e., towards or away from the limiting plate 33, effectively preventing the movable plate 43 from rotating under force. The tilting or jamming ensures that the movement trajectory of the limit pin 44 is straight. The guiding function of the slide groove 300, combined with the through hole 331 on the limit plate 33, ensures that the limit pin 44 can accurately align with the limit insertion hole 13 on the inner wall of the chassis 1 when extended, and can completely disengage when retracted, reducing the risk of locking failure or mechanism damage. An elastic element 45, specifically a spring damper 451, is provided on the side of the first plate 431 and the second plate 432 facing the limit plate 33. When the operating knob 31 is rotated to push the movable plate 43 towards the limit plate 33, the spring damper 451 is compressed first. This process absorbs part of the impact energy, avoiding a violent hard impact when the limit pin 44 is inserted into the limit insertion hole 13 of the chassis 1, thus protecting it. The design incorporates precision components such as the latch, limit socket 13, and transmission gears, reducing wear and noise. When the knob needs to be unlocked by rotating it in the opposite direction, the elastic potential energy stored in the compressed spring damper 451 is released, generating a force that pushes the movable plate 43 away from the limit plate 33. This force assists the push end 42 in pushing the movable plate 43 back, allowing the limit latch 44 to smoothly disengage from the limit socket 13, achieving a smooth and effortless unlocking action. This reset force is particularly important when the mechanism experiences slightly higher resistance due to dust or minor deformation. The damper's unique damping characteristics control the speed of the movable plate 43 during extension and retraction, making its movement more stable and controllable, avoiding safety hazards or operational discomfort caused by rapid pop-out or retraction.The 311 arrow designation reduces the possibility of user error and helps staff understand whether the lock or loose state is correct.

[0042] To better understand this utility model, the following is combined with... Figures 1 to 6 The technical solution of this utility model is described in detail as follows: When it is necessary to close and lock the equipment, the user closes the cover plate 3 towards the chassis 1. At this time, the positioning pin 32 at the lower end of the cover plate 3 will automatically insert into the positioning hole 121 on the reinforcing shell 12, realizing the initial precise positioning of the cover plate 3. At the same time, the edge of the cover plate 3 rests on the top of the reinforcing shell 12, which is higher than the inner shell 11, to obtain stable support. Then the user rotates the operation knob 31 on the cover plate 3. The knob drives the main gear 411 to rotate through the shaft. The main gear 411 simultaneously meshes and drives the first auxiliary gear 412 and the second auxiliary gear 413 on both sides to rotate synchronously in opposite directions. The first protrusion on the first auxiliary gear 412 The second protrusion 4131 on the second auxiliary gear 4121 and the second auxiliary gear 413 are respectively hinged to the first movable push rod 421 and the second movable push rod 422. The movement of the push rods then pushes the first plate 431 and the second plate 432 to move along the slide groove 300 at the lower end of the cover plate 3 towards the limiting plate 33 below the cover plate 3. During this process, the spring damper 451 facing the limiting plate 33 is first compressed to play a buffering role. Finally, the limiting pin 44 connected to the opposite side of the first plate 431 and the second plate 432 is pushed out, passes through the through hole 331 on the limiting plate 33 and is firmly inserted into the limiting insertion holes 13 on both sides of the inner wall of the chassis 1, completing the mechanical locking. The indicator arrow 311 on the operating knob 31 is in the 90° right rotation position. When the device needs to be turned on and off, the user rotates the operating knob 31 in the opposite direction, causing the indicator arrow 311 to rotate 90° to the left with the arrow pointing upwards. The main gear 411 drives the two auxiliary gears to rotate in the opposite direction. The first protrusion 4121 and the second protrusion 4131 pull the first movable push rod 421 and the second movable push rod 422, causing the first plate 431 and the second plate 432 to move away from the limiting plate 33 along the slide groove 300. At this time, the compressed spring damper 451 releases its elastic potential energy, and the resulting thrust assists the movable plate 43 in retracting, causing the limiting pin 44 to move smoothly. The device easily and effortlessly retracts from the limiting socket 13 on the inner wall of the chassis 1. The damping characteristics of the spring damper 451 simultaneously control the retraction speed to prevent rapid ejection. Once the limiting pin 44 is completely disengaged from the limiting socket 13, the mechanical locking of the cover plate 3 is released, allowing the user to remove it to expose the spectrophotometer body 2 for measurement operations. Throughout the process, the shielding plate 34 and its flexible layer below the cover plate 3 provide additional scratch protection and cushioning for the surface of the spectrophotometer body 2. Meanwhile, the shock-absorbing sponge filling the internal cavity 14 of the chassis 1 effectively absorbs vibration and impact during transportation. Combined with the external handle 15, this ensures the safety of the internal precision components when the device is carried.

[0043] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A portable ultraviolet spectrophotometer, characterized in that, include: The chassis has an inner shell inside, and a reinforcing shell is provided between the four corners of the chassis and the four corners of the inner shell. Each of the reinforcing shells has a positioning hole. Limiting holes are provided on both sides of the inner wall of the chassis, and a handle is installed on the outside of the chassis. The spectrophotometer body is installed inside the inner housing; A cover plate is detachably connected to the chassis. A rotatable operating knob is installed on the cover plate. Several positioning pins corresponding to the positioning holes are provided at the lower end of the cover plate. Limiting plates are also symmetrically arranged below the cover plate. The engaging structure includes a transmission end, a pushing end, and a movable plate; the transmission end is connected to the operating knob via a shaft, and the pushing end is hinged to the transmission end. The end of the pushing end is used to push the movable plate to move towards the limiting plate below the cover plate, and to extend the limiting pin on the movable plate into the limiting hole.

2. The portable ultraviolet spectrophotometer according to claim 1, characterized in that: The adjacent reinforcing shells form a cavity within the chassis, and the cavity is filled with shock-absorbing foam.

3. A portable ultraviolet spectrophotometer according to claim 1, characterized in that: The lower end of the cover plate is provided with two sliding grooves, and the movable plate is slidably connected in the sliding grooves.

4. A portable ultraviolet spectrophotometer according to claim 3, characterized in that: The operating knob is equipped with an arrow, and a through hole is provided on the limiting plate for the limiting pin to pass through.

5. A portable ultraviolet spectrophotometer according to claim 4, characterized in that: A shielding plate for blocking the transmission end is also provided below the cover plate, and a flexible layer is bonded to the side of the shielding plate facing the spectrophotometer body.

6. A portable ultraviolet spectrophotometer according to claim 5, characterized in that: The transmission end includes a main gear, a first auxiliary gear, and a second auxiliary gear. The main gear is connected to the operating knob via a shaft, and the first auxiliary gear and the second auxiliary gear are respectively meshed on both sides of the main gear. The first auxiliary gear and the second auxiliary gear are both connected to the bottom of the cover plate via a rotating shaft, and the pushing end is hinged to both the first auxiliary gear and the second auxiliary gear.

7. A portable ultraviolet spectrophotometer according to claim 6, characterized in that: The first auxiliary gear has a first protrusion, and the second auxiliary gear has a second protrusion. The pushing end includes a first movable push rod and a second movable push rod. The first movable push rod is hinged to the first protrusion, and the second movable push rod is hinged to the second protrusion. The ends of the first movable push rod and the second movable push rod are both hinged to the movable plate.

8. A portable ultraviolet spectrophotometer according to claim 7, characterized in that: The movable plate includes a first plate and a second plate, both of which are slidably connected within the groove. The end of the first movable push rod is hinged to the first plate, and the end of the second movable push rod is hinged to the second plate. Limit pins are connected to opposite sides of the first and second plates.

9. A portable ultraviolet spectrophotometer according to claim 8, characterized in that: Both the first plate and the second plate are provided with elastic elements on the side facing the limiting plate. The elastic elements include spring dampers.

10. A portable ultraviolet spectrophotometer according to claim 1, characterized in that: The height of the reinforcing shell is higher than the height of the inner shell.

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