Replacing device

Abstract

A replacement device for replacing an optical filter loaded on an optical filter loader, the replacement device comprising a handle having a first end and a second end; the receiving part is arranged at the first end and is provided with a wall structure and a cavity with an opening, the cavity is limited by the wall structure, and the wall structure comprises an elastic material; and a pair of first protrusions configured to oppositely protrude at least partially within the chamber and radially spaced apart by a first spacing, the first protrusions and the wall structure at least partially defining a holding space in the chamber, where the first protrusions cooperate with an elastic material, when the optical filter enters the cavity through the opening and interacts with the first protrusions, the elastic material elastically deforms, so that the first protrusions are radially spaced by a second interval larger than the first interval, and the second interval allows at least a part of the optical filter to enter the holding space. Thereafter, the first projection and the wall structure are configured to limit radial and axial movement of at least a portion of the filter within the retention space.

Description

Technical Field

[0001] The utility model relates to the field of microplate detection, and specifically designs a replacement device. Background Art

[0002] The principle of microplate detection is to detect the presence and concentration of target substances by means of fluorescence, luminescence, absorbance, etc. based on specific chemical reactions or biological reactions. Currently, analytical instruments such as microplate readers are usually used to detect biological samples in microplates. Such detections contribute to the research of many biological processes such as cell analysis and enzyme kinetics.

[0003] During detection, specifically during measurement steps such as fluorescence measurement or chemiluminescence measurement, a filter is usually required to select the wavelength detected by the sample during the above process and filter out light of unwanted wavelengths, thereby improving the accuracy of measurement or analysis.

[0004] To meet the needs of different usage scenarios, it is necessary to replace the installed filter. Existing various filters have a variety of different replacement methods due to their different structures. One replacement method involves inserting the filter. Specifically, referring to Figure 1 , the filter 10 generally includes a frame 11 and a lens 12, and the insertion method includes grasping the frame 11 by hand to manually insert the filter 10 into the filter loading member 20, for example, into the loading slot of a filter wheel, and being held by a holding device such as an elastic clip. Examples of the above filter 10 and filter loading member 20 can be, for example, referred to the filter and filter loading member used in the Varioskan TM multifunctional microplate reader obtained from Thermo Fisher Scientific (China) Co., Ltd. In this replacement method, since the size of the plug-in filter is small and the steps required for replacement are relatively simple, it is preferred for precision instruments such as microplate readers.

[0005] However, this installation method has certain deficiencies. For the sake of light weight and good light transmittance, the lens of the filter is usually made of resin material, which results in poor wear resistance and corrosion resistance of the lens. And due to the small size of the filter, the contactable frame area is small. Therefore, when replacing the filter, especially when taking out the filter, the user's hand is very likely to touch the lens of the filter, resulting in fingerprints on the lens or wearing the lens, thereby affecting the clarity and light transmittance of the filter and bringing an impact on the detection. In addition, for some users with larger hands, it may not be easy to remove the small-sized filter from the filter loading member.

[0006] Therefore, there is currently a desire for a replacement device to replace the current replacement method of manually picking and placing, so as to avoid contamination or wear of the filter as much as possible and enable rapid replacement of the filter. Summary of the Invention

[0007] To solve the problem that the filter of the insert type is easily contaminated or worn when replaced manually, the present utility model designs a replacement device for replacing the filter loaded on the filter loading member. This replacement device can replace the replacement method of manually picking up the filter to minimize the contamination or wear of the filter.

[0008] Specifically, such a replacement device includes a handle having a first end and a second end; a receiving portion provided at the first end, which has a wall structure and a chamber with an opening defined by the wall structure, the wall structure including an elastic material; and a pair of first protrusions configured to project at least partially oppositely within the chamber and spaced apart a first distance radially. The first protrusions and the wall structure at least partially define a holding space within the chamber. Among them, the first protrusions cooperate with the elastic material such that when the filter enters the chamber through the opening and interacts with the first protrusions, the elastic material undergoes elastic deformation, causing the first protrusions to be radially spaced apart by a second distance greater than the first distance. The second distance allows at least a portion of the filter to enter the holding space. And when at least a portion of the filter is within the holding space, the first protrusions and the wall structure are configured to limit the radial and axial movement of at least a portion of the filter within the holding space. This replacement device simply realizes the holding of the filter by the cooperation of the elastic deformation of the wall structure including the elastic material and the protrusions, thus avoiding manually holding the filter.

[0009] In an embodiment of the present utility model, the handle has an internal passage extending from the second end to the interior of the chamber of the receiving portion. The receiving portion is provided with a communication portion between the internal passage and the chamber. Among them, the replacement device further includes a push rod that is inserted through the internal passage and reaches the chamber via the communication portion, such that when at least a portion of the filter is within the holding space, the push rod can be operated to advance into the holding space and push the filter out of the chamber through the opening. The design of the push rod enables the filter to be conveniently pushed onto the filter loading member, avoiding manually installing the filter.

[0010] Further, the replacement device further includes a pair of second protrusions configured to radially protrude into the chamber and spaced apart from each other in the radial direction by a third distance. The second protrusions, the first protrusions and the wall structure define a holding space. The second protrusions are axially spaced apart from the first protrusions to allow at least a portion of the filter to be received between the first protrusions and the second protrusions and to limit the axial movement of at least a portion of the filter therebetween. When the push rod enters the chamber, the push rod interacts with the second protrusions. The second protrusions cooperate with the elastic material such that when the push rod enters the chamber and interacts with the second protrusions, the elastic material elastically deforms, causing the second protrusions to be spaced apart from each other in the radial direction by a fourth distance greater than the third distance to allow the push rod to advance into the holding space and push against the filter, and causing the first protrusions to be spaced apart from each other in the radial direction by a distance greater than or equal to the second distance, thereby allowing the filter to leave the holding space. The presence of the second protrusions enables the push rod to simultaneously release the filter from the holding space and move the filter onto the filter carrier.

[0011] In one example, the elastic material includes a pair of elastic members spaced apart from each other. The first protrusions and the second protrusions are connected to the elastic members and protrude into the chamber.

[0012] In another example, the wall structure includes a pair of first extensions spaced apart from each other. The elastic material is mounted on each of the pair of first extensions, and the first protrusions and the second protrusions are provided on the elastic material and protrude through the first extensions into the chamber.

[0013] Preferably, the first protrusion has a first inclined surface that cooperates with at least a portion of the filter. When the filter pushes against the first inclined surface, the first inclined surface is subjected to a pressure perpendicular to the inclined surface, and this pressure has a component in the vertical direction, thereby making it easier to lift the elastic material.

[0014] Also preferably, the second protrusion has a second inclined surface that cooperates with the shape of the end portion of the push rod entering the chamber. When the push rod pushes against the second inclined surface, the second inclined surface is subjected to a pressure perpendicular to the inclined surface, and this pressure has a component in the vertical direction, thereby making it easier to lift the elastic material.

[0015] In an embodiment of the present invention, the wall structure includes second extensions spaced apart from each other in a direction intersecting the direction opposite to the pair of first extensions. The second extensions and the first extensions together limit the radial movement of the portion of the filter entering the chamber.

[0016] In one example, the filter loading member is a loading slot of a filter wheel, and the loading slot has a recess. In this case, the second extension portion has an arc-shaped profile to fit the profile of the filter, so that the filter can be quickly picked up without the need for a long alignment time. Further, the second extension portion has a protrusion adapted to engage the recess, so that when replacing the filter, the engagement of the protrusion with the recess can accurately position the replacement device, realizing the anti-mistake design of the tool. In addition, the engagement of the protrusion with the recess can give the user tactile feedback.

[0017] Preferably, a handle-side flange is formed on the handle, enabling the user to more stably and conveniently hold and operate the replacement device with one hand. A push-rod-side flange is also formed outside the second end of the handle of the push rod to facilitate the user to press the push rod and prevent the push rod from being completely pushed into the inner channel of the handle.

[0018] Further, a return spring is provided between the handle and the push rod. After the user pushes the push rod to complete the operation, the return spring can reset the push rod to wait for the next operation, simplifying the operation steps.

[0019] Optionally, it further includes a lighting component installed on the replacement device. In a relatively dark environment, the lighting component can be adjusted to different brightness values according to the internal structure and the environment for checking the filter model.

[0020] The additional features and advantages of the described replacement device will be set forth in the detailed description below, and will be apparent to those skilled in the art from the following description which is obvious to those skilled in the art or recognized by those skilled in the art from practicing the embodiments described herein. These descriptions include the following detailed description and the accompanying drawings. Description of the Drawings

[0021] With reference to the above objectives, the technical features of the present utility model are clearly described in the following claims, and its advantages are obvious from the following detailed description with reference to the drawings. The drawings illustrate the preferred embodiments of the present utility model by way of example, without limiting the scope of the inventive concept of the present utility model.

[0022] Figure 1 The filter and the filter loading member are shown;

[0023] Figure 2 A perspective view of a replacement device according to an embodiment of the present utility model is shown;

[0024] Figure 3 An exploded view of a replacement device according to an embodiment of the present utility model is shown;

[0025] Figure 4 A perspective view of the push rod of a replacement device according to an embodiment of the present utility model is shown;

[0026] Figure 5 Shows a partial cross-sectional view at the receiving part of a replacement device according to an embodiment of the present utility model;

[0027] Figure 6 Shows a partial cross-sectional view at the receiving part of a replacement device according to an embodiment of the present utility model, where the filter is being pushed against the first protrusion; and

[0028] Figure 7 Shows a partial cross-sectional view at the receiving part of a replacement device according to an embodiment of the present utility model, where the push rod is being pushed against the second protrusion.

[0029] Reference numerals

[0030] 10 Filter

[0031] 11 Frame

[0032] 12 Lens

[0033] 20 Filter loading member

[0034] 100 Handle

[0035] 101 First end

[0036] 102 Second end

[0037] 103 Internal channel

[0038] 104 Handle side flange

[0039] 200 Receiving part

[0040] 201 Chamber

[0041] 202 Opening

[0042] 203 Holding space

[0043] 204 Connecting part

[0044] 205 Step

[0045] 210 First extension

[0046] 211 Hole

[0047] 220 Second extension

[0048] 221 Protrusion

[0049] 300 First protrusion

[0050] 301 First inclined surface

[0051] 400 Elastic member

[0052] 500 Push rod

[0053] 501 Push rod side flange

[0054] 502 Stop

[0055] 503 Return spring

[0056] 600 Second protrusion

[0057] 601 Second inclined plane Detailed implementation mode

[0058] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments, but it shall not be used as a basis for any limitation to the present utility model.

[0059] The orientation terms "horizontal", "vertical", "up", "down", etc. used in this article are defined with reference to Figure 5-6 the directions of the respective components shown. It should be understood that in actual applications, the respective components may not be limited to the directions described in this article.

[0060] In this article, for simplicity, the handle is considered to have a generally cylindrical shape and thus is considered to have a central axis. On this basis, the orientation term "axial direction" used in this article refers to the direction along the central symmetry axis of the length of the cylinder, and the "radial direction" refers to the direction perpendicular to the central symmetry axis of the cylinder. It should be understood that in various embodiments, the handle may also have other cylindrical shapes other than cylindrical, and the "axial direction" and "radial direction" can be defined similarly. Further. The "axial movement" of any object refers to the movement of the object along the axial direction of the handle, and the "radial movement" of the object refers to the movement of the object along the radial direction of the handle.

[0061] In this article, the term "elastic material" can refer to either a material that forms part of a component such that the component is at least partially elastic, or an independent elastic member.

[0062] In this article, the "restriction" of movement refers to preventing the complete free movement of an object or a part thereof but allowing it to move in a limited length or space (e.g., slight shaking), rather than being limited to completely preventing the movement of the object.

[0063] In this article, the term "holding space" refers to the movement space restricted when a part of the filter enters the chamber, that is, the received part can only move in the holding space.

[0064] As used herein, the term "first spacing" refers to the minimum spacing between a pair of first protrusions in the absence of an external force. The term "second spacing" refers to the minimum spacing between a pair of first protrusions that just allows at least a portion of the filter to enter the holding space. The term "third spacing" refers to the minimum spacing between a pair of second protrusions in the absence of an external force. The term "fourth spacing" refers to the minimum spacing between a pair of second protrusions that just allows the push rod to enter the holding space.

[0065] The present utility model relates to a replacement device for replacing a filter loaded on a filter carrier, particularly a filter in the form of a plug-in with a frame. Specifically, such a replacement device holds a portion of the frame of the filter in a holding space and restricts the movement of the flange in that space. It should be understood that although embodiments of the replacement device for a specific form of filter are described herein, the described replacement device can also be used for other elements with similar shapes, and variations or modifications of the described replacement device can be used for various forms of filters loaded on various filter carriers, and these variations or modifications all fall within the scope of the present utility model.

[0066] As Figure 2-3 shown, in a preferred embodiment of the present utility model, the replacement device includes a handle 100 having a first end 101 and a second end 102. A receiving portion 200 for receiving the filter is provided at the first end 101 of the handle 100. Referring to Figure 3 , the receiving portion 200 can be a separate component assembled to the handle 100 by a threaded connection. In other embodiments, the receiving portion 200 can be integrally formed with the handle 100 or can be partially integrally formed with the handle 100 and partially assembled to the handle 100. The receiving portion 200 has a wall structure and a chamber 201 defined by the wall structure, and the chamber 201 has an opening 202 which is preferably formed in a direction away from the first end 101 of the handle 100, so that at least a portion of the filter (not shown) can enter the chamber 201 through the opening 202. The chamber 201 can restrict the radial movement of the portion of the filter entering the chamber 201.

[0067] In this preferred embodiment, the wall structure includes a pair of first extensions 210 spaced apart from each other (see also Figure 5 ). One of the first extensions 210 (for example, the lower first extension) can be integrally formed with the receiving portion 200 and the other (for example, the upper first extension) is assembled to the receiving portion 200 by, for example, a threaded connection. In other embodiments, the first extensions 210 can be integrally formed with the receiving portion 200 or can be separate components assembled to the receiving portion 200.

[0068] The wall structure may optionally include second extensions 220 spaced apart in a direction intersecting the direction opposite to the paired first extensions 210. The second extensions 220 may be integrally formed on the receiving portion 200, and one or more of the first extensions 210 may be mounted on the second extensions 220 by, for example, threaded connection (see Figure 3 ). The second extensions 220, together with the first extensions 210, limit the radial movement of the portion of the filter entering the chamber 201. As shown in the figure, the second extensions 220 are shaped to have an arc-shaped profile to fit the profile of the filter (refer to Figure 1 ), so that the filter can be quickly picked up without the need for a long alignment time. Further, in the case where the filter loading member is the loading slot of a filter wheel, the loading slot has a recess (not shown), and the second extensions 220 have protrusions 221 adapted to fit the recess. This enables the engagement of the protrusions 221 with the recess to accurately position the replacement device when replacing the filter, achieving a foolproof design of the tool. In addition, the engagement of the protrusions 221 with the recess can give the user a tactile feedback to inform the customer that the replacement device is in place or that the replacement device has received a part of the filter.

[0069] Further, the wall structure may include an elastic material. The elastic material may be formed as part of the wall structure, may be an elastic element independently forming part of the wall structure, or a combination of both, such that at least a part of the wall structure has elasticity. Thus, when subjected to an external force, the wall structure can expand or deform through the elasticity of its own material or through an elastic element (such as a shrapnel) having a linkage effect with the wall.

[0070] It should be understood that in addition to the above-described wall structure including the elastic material of the first extensions 210 and the second extensions 220, other shapes and configurations of the wall structure can also be envisioned. For example, the wall structure may include six or eight circumferentially arranged walls instead of four walls, as long as the wall structure can limit the radial movement of at least a part of the filter within a space.

[0071] Referring to Figure 5-6 , in a preferred embodiment of the present invention, the replacement device further includes a pair of first protrusions 300 configured to protrude at least partially opposite to each other within the chamber 201 and spaced apart a first distance in the radial direction (refer to Figure 5 ), and the first protrusions 300 and the wall structure at least partially define a holding space 203 within the chamber ( Figure 5 ).

[0072] In an embodiment of the present invention, when the wall structure includes an elastic material, there are various options for the arrangement of the first protrusions 300.

[0073] In one example, the first protrusion 300 can be assembled on an elastic member 400 made at least partially of an elastic material. The paired elastic members 400 are spaced apart from each other, and the first protrusion 300 is connected to the elastic member 400 and protrudes into the chamber 201. In this example, the above-mentioned first extension 210 is omitted, and the shape of the elastic member 400 is designed to function as the first extension, that is, the elastic member 400 can both limit the radial movement of at least a part of the filter and elastically deform to change the distance between the first protrusions 300. When the filter is pushed against the first protrusion 300 from the opening 202, the first protrusion 300 is "spread apart" in the up and down direction by the elastic deformation of the elastic member 400 to change the first distance between the first protrusions 300.

[0074] In another example, an elastic material, such as the elastic member 400, is provided on each of the paired first extensions 210, and the first protrusion 300 is provided on the elastic material and protrudes into the chamber 201 through the first extension 210. Specifically, the elastic member 400 can be an elastic claw-shaped member, and its two side claw parts are fixed to the first extension 210 by, for example, screw connection (in the Figure 3 example shown, the threaded hole can lead to the second extension 220), and the middle claw part of the elastic member 400 can assemble the first protrusion 300, and the first protrusion 300 protrudes into the chamber 201 through the hole 211 of the first extension 210. When there is no external force, the middle claw part of the elastic member 400 straddles the hole 211 and rests on the first extension 210, and when the filter is pushed against the first protrusion 300 from the opening 202, the first protrusion 300 is "spread apart" in the up and down direction by the elastic deformation of the elastic member 400 to change the first distance between the first protrusions 300.

[0075] In other examples, at least a part of the first extension 210 can elastically deform, and the first protrusion 300 can be assembled on the elastic member 400 or the first extension 210. The elastic member 400 is partially connected to the first extension 210, so that the first distance between the first protrusions 300 is changed by the elastic deformation of at least a part of the first extension 210 and the elastic member 400.

[0076] In summary, referring to Figure 6, the first protrusion 300 can be configured to cooperate with the elastic material such that when the filter 10 enters the chamber 201 through the opening 202 and interacts with the first protrusion 300, the elastic material undergoes elastic deformation, causing the first protrusion 300 to be spaced apart in the radial direction (specifically, in the vertical direction) by a second spacing greater than the first spacing. The second spacing allows at least a portion of the filter 10 (e.g., a portion of the frame 11) to enter the holding space 203, and when at least a portion of the filter 10 is within the holding space 203, the first protrusion 300, together with the wall structure, restricts the radial and axial movement of at least a portion of the filter within the holding space 203. Specifically, the portion of the frame 11 of the filter 10 that protrudes in the vertical direction at the edge will be restricted by the first protrusion 300 such that the frame 11 of the filter 10 does not move axially out of the holding space 203.

[0077] Preferably, the first protrusion 300 has a first inclined surface 301 that cooperates with at least a portion of the filter 10. When the filter is pushed against the first inclined surface 301 of the first protrusion 300, the first inclined surface 301 is subjected to a pressure perpendicular to the inclined surface, and this pressure has a component in the vertical direction (upward or downward), thereby more easily causing the elastic material to warp so that the first inclined surface 301 is spaced apart by a second spacing greater than the first spacing.

[0078] Referring to Figure 3 , in an embodiment of the present invention, the handle 100 has an internal passage 103 that penetrates from the second end 102 to the inside of the chamber 201, and the receiving portion 200 is provided with a communication portion 204 between the internal passage 103 and the chamber 201.

[0079] Referring to Figure 3-5 , the replacement device further includes a push rod 500. The push rod 500 is inserted through the internal passage 103 and reaches the chamber 201 via the communication portion 204 such that when at least a portion of the filter is within the holding space 203, the push rod 500 can be operated to advance into the holding space 203 and push the filter out of the chamber 201 through the opening 202.

[0080] In order to increase the spacing between the first protrusions 300 to allow the push rod 500 to push out the filter, the replacement device further includes a pair of second protrusions 600. Referring to Figure 5 and 7 , the pair of second protrusions 600 are configured to protrude radially into the chamber 201 and are spaced apart in the radial direction by a third spacing (referring to Figure 5) The third spacing may be equal to or may not be equal to the first spacing. The second protrusion 600, the first protrusion 300 and the wall structure together define a holding space 203. The second protrusion 600 is axially spaced from the first protrusion 300 to allow at least a portion of the filter to be received between the first protrusion 300 and the second protrusion 600 and to limit the axial movement of at least a portion of the filter therebetween.

[0081] Similarly to the second protrusion 600, in one example, the second protrusion 600 may be fitted on an elastic member 400 made at least partially of an elastic material. Pairs of elastic members 400 are spaced apart from each other, and the second protrusion 600 is connected to the elastic member 400 and protrudes into the chamber 201. In this example, the above-mentioned first extension 210 is omitted, and the shape of the elastic member 400 is designed to function as the first extension, that is, the elastic member 400 can both limit the radial movement of at least a portion of the filter and elastically deform to change the spacing between the second protrusions 600. In another example, an elastic material, such as a claw-shaped elastic member 400, is provided on each of the paired first extensions 210, and the second protrusion 600 is provided on the elastic material and protrudes into the chamber 201 through the hole 211 of the first extension 210. In the absence of an external force, a portion of the elastic member 400 rests across the hole 211 on the first extension 210, and when the push rod 500 enters the chamber 201 from the communication portion 204 and pushes against the second protrusion 600, the second protrusion 600 changes the third spacing therebetween through the elastic deformation of the elastic member 400.

[0082] In summary, as Figure 7 shown, when the push rod 500 enters the chamber 201, the push rod 500 first interacts with the second protrusion 600. The second protrusion 600 may be configured to cooperate with the elastic material such that when the push rod 500 enters the chamber 201 through the opening 202 and interacts with the second protrusion 600, the elastic material elastically deforms, causing the second protrusion 600 to be radially spaced apart by a fourth spacing greater than the third spacing to allow the push rod 500 to advance into the holding space 203 and push against the filter, and causing the first protrusion 300 to have a radial spacing greater than or equal to the second spacing, thereby allowing the filter to leave the holding space 203 and be pushed out of the opening 202.

[0083] Preferably, the second protrusion 600 has a second inclined surface 601 that is shaped to fit the end of the push rod 500 entering the chamber. When the push rod 500 pushes against the second inclined surface 601 of the second protrusion 600, the second inclined surface 601 is subjected to a pressure perpendicular to the inclined surface, and this pressure has a component in the vertical direction (upward or downward), thereby more easily causing the elastic material to tilt so that the second inclined surface 601 is spaced apart by a fourth spacing greater than the third spacing.

[0084] InFigure 5-7 In the embodiment shown, the first protrusion 300 and the second protrusion 600 are formed as an integral part, which can be snap-fitted to an elastic material, for example. Of course, the first protrusion 300 and the second protrusion 600 can also be separate parts and are respectively snap-fitted to the elastic material.

[0085] Advantageously, both the first protrusion 300 and the second protrusion 600 are made of a material with a lower hardness to avoid possible damage to the filter by the protrusions with high hardness when restricting the filter.

[0086] In addition, although the embodiment of the present utility model describes the structure of the replacement device symmetric about the central axis of the handle, where the first extension 210, the second extension 220, the first protrusion 300, the elastic material (such as the elastic member 400) and the second protrusion 600 all have the same shape, it should be understood that as long as the replacement operation of the filter is not affected, the above components can have different shapes.

[0087] Returning to Figure 1 , in the embodiment of the present utility model, a handle-side flange 104 is formed on the handle 100. Further, a push-rod-side flange 501 is formed on the outside of the second end 102 of the push rod 500 located on the handle 100. The handle-side flange 104 enables the user to more stably and conveniently hold and operate the replacement device with one hand. For example, the user can adopt the holding method of a syringe (pressing the handle-side flange 104 with the index finger and middle finger and pushing the push rod 500 with the thumb) or the holding method of a pen clip (pressing the handle-side flange 104 with the thumb and middle finger and pushing the push rod 500 with the index finger) to operate the replacement device. Further, a push-rod-side flange 501 is formed on the outside of the second end 102 of the push rod 500 located on the handle 100. The push-rod-side flange 501 also facilitates the user's operation (such as pressing the push rod) and can prevent the push rod 500 from being completely pushed into the inner channel of the handle 100.

[0088] Referring to Figure 4 , a return spring 503 is provided between the handle 100 and the push rod 500. Specifically, in combination with Figure 4-5 , the push rod 500 has a stop portion 502, one end of the return spring 503 is installed on the stop portion, and the other end abuts against a step 205 formed in the communicating portion 204 of the receiving portion of the handle. After the user presses the push rod 500 to complete the operation by pushing the push rod 500, the return spring 503 can reset the push rod 500 to wait for the next operation, saving additional operation steps.

[0089] Additionally, in the embodiments of the present utility model, a lighting component (not shown, such as an LED lamp) can also be installed on the replacement device. The lighting component can be installed at the opening 202 for illumination. In the case of a relatively dark environment, the lighting component can be used to check the filter type. In addition, the illumination brightness of the lighting component can be adjusted to different brightness values according to the internal structure and the environment to meet different requirements.

[0090] Although the structure and operation method of the present utility model have been described above in conjunction with the preferred embodiments, those of ordinary skill in the art in this technical field should recognize that the above examples are only for illustration and cannot be used as a limitation to the present utility model. Therefore, the present utility model can be modified and varied, and these modifications and variations will all fall within the scope defined by the appended claims of this application.

Claims

1. A replacement device for replacing a filter loaded on a filter loading member, characterized in that, The replacement device includes: a handle (100) having a first end (101) and a second end (102); a receiving portion (200) provided at the first end (101) of the handle (100), the receiving portion (200) having a wall structure and a chamber (201) defined by the wall structure with an opening (202), the wall structure including an elastic material; and a pair of first protrusions (300) configured to protrude at least partially opposite to each other within the chamber (201) and spaced apart a first distance radially, the first protrusions (300) and the wall structure at least partially defining a holding space (203) within the chamber (201), wherein the first protrusions (300) cooperate with the elastic material such that when the filter passes through the opening (202) into the chamber (201) and interacts with the first protrusions (300), the elastic material elastically deforms such that the first protrusions (300) are spaced apart a second distance greater than the first distance radially, the second distance allowing at least a portion of the filter to enter the holding space (203), and wherein when at least a portion of the filter is within the holding space (203), the first protrusions (300) and the wall structure are configured to restrict radial and axial movement of the at least a portion of the filter within the holding space (203).

2. The replacement device according to claim 1, wherein the handle (100) has an internal passage (103) extending from the second end (102) through to the interior of the chamber (201) of the receiving portion (200), the receiving portion (200) having a communication portion (204) between the internal passage (103) and the chamber (201), and wherein the replacement device further includes a push rod (500) inserted through the internal passage (103) and reaching the chamber (201) via the communication portion (204) such that when at least a portion of the filter is within the holding space (203), the push rod (500) can be operated to advance into the holding space (203) and push the filter out of the opening (202) from the chamber (201).

3. The replacement device according to claim 2, wherein It further includes a pair of second protrusions (600) configured to radially protrude into the chamber (201) and spaced apart in the radial direction by a third spacing, wherein the second protrusions (600), the first protrusions (300) and the wall structure define the holding space (203), and the second protrusions (600) are axially spaced apart from the first protrusions (300) to allow at least a portion of the filter to be received between the first protrusions (300) and the second protrusions (600) and to restrict axial movement of at least a portion of the filter therebetween. Wherein, when the push rod (500) enters the chamber (201), the push rod (500) interacts with the second protrusions (600). Wherein, the second protrusions (600) cooperate with the elastic material such that when the push rod (500) enters the chamber (201) and interacts with the second protrusions (600), the elastic material elastically deforms, causing the second protrusions (600) to be spaced apart in the radial direction by a fourth spacing greater than the third spacing to allow the push rod (500) to advance into the holding space (203) and push against the filter, and causing the first protrusions (300) to have a radial spacing greater than or equal to the second spacing, thereby allowing the filter to leave the holding space (203).

4. The replacement device according to claim 3, wherein the elastic material includes a pair of elastic members (400) spaced apart from each other, and the first protrusions (300) and the second protrusions (600) are connected to the elastic members (400) and protrude into the chamber (201).

5. The replacement device according to claim 4, wherein the wall structure includes a pair of first extensions (210) spaced apart from each other, the elastic material is mounted on each of the pair of first extensions (210), and the first protrusions (300) and the second protrusions (600) are disposed on the elastic material and protrude through the first extensions (210) into the chamber (201).

6. The replacement device according to claim 1, wherein the first protrusions (300) have a first inclined surface (301) that cooperates with at least a portion of the filter.

7. The replacement device according to claim 3, wherein the second protrusions (600) have a second inclined surface (601) that is shaped to cooperate with the end of the push rod (500) entering the chamber (201).

8. The replacement device according to claim 5, wherein the wall structure includes second extensions (220) spaced apart in a direction intersecting the direction opposite to the pair of first extensions (210).

9. The replacement device according to claim 8, wherein the filter loading member is a loading groove of a filter wheel, and the loading groove has a recess. Wherein, the second extension portion (220) has an arc-shaped profile to fit the profile of the filter, and wherein, the second extension portion (220) has a protrusion (221) adapted to engage the recess.

10. The replacement device according to claim 2, wherein a handle-side flange (104) is formed on the handle (100), and / or a push-rod-side flange (501) is formed outside the second end of the handle of the push rod (500).

11. The replacement device according to claim 2, wherein a return spring (503) is provided between the handle (100) and the push rod (500).

12. The replacement device according to any one of claims 2 to 11, wherein it further includes a lighting component mounted on the replacement device.

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