A testing device

Abstract

This application provides a testing device, including a housing, a testing component, a rollable screen assembly, and a display module. Specifically, the housing has a receiving cavity; the testing component is disposed in the housing and used to detect relevant parameters of the sample to be tested; the rollable screen assembly is disposed within the receiving cavity and is rotatably connected to the housing; the display module is electrically connected to the testing component, and the display module includes a fixed end and a free end, the fixed end being fixed to the rollable screen assembly, the display module being able to roll around the rollable screen assembly to be in a rolled state, and the display module being able to unfold around the rollable screen assembly to be in a flattened state; wherein, when changing from the rolled state to the flattened state, the free end extends out of the receiving cavity through an opening on the side wall of the housing. Specifically, the testing device provided by this application can realize large-screen display and can provide consumers with more complete testing data display.

Description

Technical Field

[0001] This application relates to the field of sample collection and testing, and in particular to a testing device. Background Technology

[0002] The testing equipment is used to detect relevant parameters of the sample, such as blood glucose parameters, trace element content, sugar content, and harmful substances.

[0003] Taking blood glucose meters currently on the market as an example, traditional blood glucose meters use small-sized TN monochrome LCD screens, which can only display some numbers and icons in a monotonous way. They cannot fully monitor their own blood glucose data and changes. Therefore, the user experience is poor, and the products urgently need improvement. Summary of the Invention

[0004] This application provides a testing device that solves the problems of small display screens and monotonous data displayed in existing testing devices.

[0005] To solve the above-mentioned technical problems, the first technical solution provided in this application is: to provide a detection device, comprising: a housing having a receiving cavity; a detection component disposed in the housing for detecting relevant parameters of a sample to be tested; a rollable screen assembly disposed in the receiving cavity and rotatably connected to the housing; and a display module electrically connected to the detection component, wherein the display module includes a fixed end and a free end opposite to each other, the fixed end being fixed to the rollable screen assembly, the display module being able to roll around the rollable screen assembly to be in a rolled state, and the display module being able to unfold around the rollable screen assembly to be in a flattened state; wherein, when changing from the rolled state to the flattened state, the free end extends out of the receiving cavity through an opening on the side wall of the housing.

[0006] In one embodiment, the display module includes: a support structure having a fixed end and a free end, and the support structure including a plurality of sub-plates arranged along a curling direction or a flattening direction and a connector connecting two adjacent sub-plates; a flexible display panel electrically connected to the detection component and disposed on a surface of the support structure, the flexible display panel being capable of synchronously curling and unfolding with the support structure; wherein, the connector is located on the side of the sub-plate facing away from the flexible display panel, and in the flattened state, the connector supports two adjacent sub-plates to keep the two adjacent sub-plates on the same horizontal plane.

[0007] In one embodiment, each of the connectors includes a first support portion and a second support portion perpendicular to the first support portion. One end of the first support portion is fixedly connected to one side of the sub-plate along the curling or flattening direction, and the other end extends out of the sub-plate and connects to the second support portion. Each sub-plate is provided with a receiving groove matching the shape of the connector on the other side along the curling or flattening direction. The receiving groove is used to receive the connector on the adjacent sub-plate when the support structure is in the flattened state.

[0008] In one embodiment, the side surface of the first support portion has a spring pin; the receiving groove includes a first receiving groove for receiving the first support portion and a second receiving groove for receiving the second support portion, the side wall of the first receiving groove has a clearance portion, the support structure is in the flattened state, and the spring pin is received in the clearance portion; preferably, the number of spring pins on the first support portion is two and they are symmetrically arranged, and the number of clearance portions on the first receiving groove is two and they are symmetrically arranged.

[0009] In one embodiment, each of the sub-boards has a first limiting portion on a surface opposite to the flexible display panel, and the screen roll-up assembly has a second limiting portion. During the process of the support structure retracting into the receiving cavity, the first limiting portion on each of the sub-boards engages with the second limiting portion on the screen roll-up assembly. Preferably, one of the first limiting portion and the second limiting portion is a limiting protrusion, and the other is a limiting groove.

[0010] In one embodiment, the surfaces of the first limiting portion and the second limiting portion that mate, and / or the surfaces of the second limiting portion and the first limiting portion that mate, are provided with magnetic material; preferably, the limiting protrusion is made of metal, and the inner surface of the limiting groove is provided with magnetic material.

[0011] In one embodiment, the free end of the support structure is further provided with a handle, which is located outside the receiving cavity when the support structure is in the curled state.

[0012] In one embodiment, the rollable screen assembly includes a rollable screen shaft and a drive assembly; the fixed end is connected to the side wall of the rollable screen shaft; the drive assembly is used to drive the rollable screen shaft to rotate, so that the support structure gradually unfolds to the flattened state and / or gradually curls to the curled state.

[0013] In one embodiment, the driving assembly includes: a fixed shaft extending through the scrolling shaft along its axis of rotation, a first end of the fixed shaft being fixedly connected to a housing, and a third limiting portion on a second end of the fixed shaft; a first rotating member located on the side of the third limiting portion away from the first end of the fixed shaft, the first rotating member having a fourth limiting portion and first connecting portions located on both sides of the fourth limiting portion, the second end of the fixed shaft also extending through the fourth limiting portion and rotatably connected to the fourth limiting portion; a second rotating member including a limiting plate and a second connecting portion, the limiting plate being located on the side of the first rotating member away from the third limiting portion and spaced apart from the first rotating member, the second end of the fixed shaft also rotatably connected to the limiting plate; the first connecting portion having a clearance hole, and the scrolling shaft having a clearance groove. One end of the second connecting part is fixedly connected to the limiting plate, and the other end passes through the relief hole and is fixedly connected to the relief groove; an elastic element is sleeved on the fixed shaft and located between the first rotating member and the second rotating member; wherein, one of the third limiting part and the fourth limiting part has a limiting protrusion and the other has a limiting groove, and the sidewalls of the limiting protrusion and the limiting groove that engage are inclined surfaces; when the support structure is in the curled state, the limiting protrusion is embedded in the limiting groove, and the elastic element is in a first compressed state; when the support structure is in the flattened state, the limiting protrusion moves to the top surface of the sidewall of the limiting groove, and the elastic element is in a second compressed state; the compression amount of the elastic element in the first compressed state is less than the compression amount in the second compressed state.

[0014] In one embodiment, the detection component includes a sampling element and a detection module. The sampling element is used to collect the sample to be tested, and the detection module is used to detect relevant parameters of the sample to be tested. The detection module is electrically connected to the display module, and the display module is used to visualize the relevant parameters detected by the detection module.

[0015] Unlike existing technologies, the advantages of this application are that the testing equipment includes a display module that can be rolled up or unfolded around a rollable assembly, thereby enabling large-screen display on a smaller device and providing consumers with more complete testing data. In addition, the display module includes a flexible display panel and a support structure for supporting the flexible display panel in a flattened state, providing horizontal support and improving the user experience. Furthermore, the rollable assembly includes a rollable shaft and a drive assembly, which can drive the rollable shaft to rotate, realizing semi-automatic or fully automatic rolling and unfolding of the display module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the testing equipment provided in this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the detection equipment from another perspective;

[0019] Figure 3 for Figure 1 A cross-sectional view of the detection equipment along line AA;

[0020] Figure 4 An exploded view of the structure of an embodiment of the display module provided in this application;

[0021] Figure 5 for Figure 4 Exploded view of the structure of two adjacent sub-plates and connectors;

[0022] Figure 6 A schematic diagram of the structure of an embodiment of the driving component provided in this application;

[0023] Figure 7 for Figure 6 The exploded view of the drive component shown. Detailed Implementation

[0024] The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] See Figures 1-3 , Figure 1 A schematic diagram of the structure of an embodiment of the testing equipment provided in this application; Figure 2 for Figure 1 A schematic diagram of the detection equipment from another perspective; Figure 3 for Figure 1 A cross-sectional view of the detection equipment along line AA. This application provides a testing device 100, including a housing 10, a testing component (not shown), a rollable screen assembly 30, and a display module 40. The housing 10 has a receiving cavity 11, which can be formed by the side wall, top wall, and bottom wall of the housing 10. The testing component is disposed in the housing 10, for example, in the top wall, bottom wall, and / or receiving cavity 11 of the housing 10, and is used to detect relevant parameters of the sample to be tested. The rollable screen assembly 30 is disposed in the receiving cavity 11 and is rotatably connected to the housing 10. The display module 40 is electrically connected to the testing component and includes a fixed end A1 and a free end A2. The fixed end A1 is fixed to the rollable screen assembly 30. The display module 40 can be rolled around the rollable screen assembly 30 to be in a rolled state, and the display module 40 can be unfolded around the rollable screen assembly 30 to be in a flattened state. When changing from a rolled state to a flattened state, the free end A2 extends out of the receiving cavity 11 through an opening on the side wall of the housing 10.

[0028] Specifically, when using the testing device 100, the testing component can collect the sample to be tested, or the user can place the sample to be tested on the testing component so that the testing component can detect the relevant parameters of the sample to be tested and transmit the detected relevant parameters to the display module 40, so that the display module 40 can display the relevant parameters of the sample to be tested to the user in a visual form.

[0029] Since the display module 40 can be rolled up or unfolded around the rollable assembly 30, it can be stored in the receiving cavity 11 when the testing device 100 is not in use, making it easy to carry and protecting the display module 40. It should be noted that the display module 40 can be rolled up one or more times around the rollable assembly 30, depending on the length of the display module 40 and the radius of the rollable assembly 30. When the testing device 100 is in use, the display module 40 is unfolded out of the receiving cavity 11 into a flat state, enabling a large-screen display on a smaller device. Compared to the small-sized TN monochrome LCD screens of existing devices, the display module 40 in this application can provide consumers with a more complete display of testing data. For example, the display module 40 can display more parameter data and richer display formats, such as data change curves and dynamic data displays, improving the user experience.

[0030] In one embodiment, the detection component includes a sampling element and a detection module. The sampling element is used to collect the sample to be tested, and the detection module is used to detect relevant parameters of the sample to be tested. The detection module is electrically connected to the display module 40.

[0031] In one specific embodiment, see Figure 2 The bottom wall of the housing 10 is provided with a sampling needle groove 12, the sampling element is a sampling needle, and the sampling needle groove 12 is used to accommodate the sampling needle. The sampling needle and the sampling needle groove 12 can be fixedly connected or detachably connected. The detection module is set in the accommodating cavity and is connected to the sampling needle and the display module 40 respectively. It is used to detect the sample to be tested sampled by the sampling needle, analyze the sample to be tested, and transmit the relevant parameters obtained from the analysis to the display module 40 for display.

[0032] In another specific embodiment, see Figure 1 The top wall of the housing 10 is provided with a sampling groove 13, and the sampling element is a sampling test paper. The sampling groove 13 is used to accommodate the sampling test paper. The detection module is set in the accommodating cavity and is connected to the sampling test paper and the display module 40 respectively. It is used to detect the relevant parameters of the sample to be tested on the sampling test paper and further transmit them to the display module 40 for display.

[0033] In yet another embodiment, combined with Figure 1 and Figure 2 The bottom wall of the housing 10 is provided with a sampling needle groove 12, and the top wall of the housing 10 is provided with a sampling groove 13. The sampling element includes a sampling needle and a sampling test strip. The sampling needle and the sampling needle groove 12 can be fixedly connected or detachably connected. The sampling groove 13 is used to accommodate the sampling test strip. The detection module is disposed in the accommodating cavity and is at least connected to the sampling test strip and the display module 40. The user can collect the sample to be tested through the sampling needle and then drop it onto the sampling test strip for detection by the detection module. Alternatively, both the sampling needle and the sampling test strip are connected to the detection module so that the detection module can detect the relevant parameters of the sample to be tested through the sampling needle or the sampling test strip.

[0034] In one embodiment, see Figures 3-5 , Figure 4 An exploded view of the structure of an embodiment of the display module provided in this application; Figure 5 for Figure 4 An exploded view of the structure of two adjacent sub-plates and the connector. Specifically, the display module 40 includes a support structure 50 and a flexible display panel 60. The support structure 50 has a fixed end A1 and a free end A2, and includes multiple sub-plates 51 arranged along the curling direction or the flattening direction, and connectors 52 connecting adjacent sub-plates 51. The flexible display panel 60 can be one of an organic light-emitting diode (OLED), an active matrix light-emitting diode (AMOLED), an LED display panel, or a liquid crystal display (LCD), but is not limited to these. The flexible display panel 60 is electrically connected to the detection module in the detection assembly, and is disposed on one surface of the support structure 50 by means of adhesion or snap-fit, so that the flexible display panel 60 can be curled and unfolded synchronously with the support structure 50. The connector 52 is located on the side of the sub-plate 51 away from the flexible display panel 60. When the support structure 50 is in the flattened state, the connector 52 supports two adjacent sub-plates 51 so that the two adjacent sub-plates 51 are kept on the same horizontal plane.

[0035] Specifically, by setting a support structure 50 on the backlight surface of the flexible display panel 60, when the flexible display panel 60 is in a flattened state, the support structure 50 can provide horizontal support for the flexible display panel 60, so that the user does not need to hold it with their hands to maintain the flexible display panel 60 in a horizontal unfolded state, freeing the user's hands and improving the user experience.

[0036] In one embodiment, combined with Figure 4 and Figure 5 Each connector 52 includes a first support portion 521 and a second support portion 522 perpendicular to the first support portion 521. One end of the first support portion 521 is fixedly connected to one side of the sub-plate 51 along the curling or flattening direction, and the other end extends out of the sub-plate 51 and connects to the second support portion 522 to form a "T" shaped structure. Each sub-plate 51 is provided with a receiving groove 511 matching the shape of the connector 52 on the other side along the curling or flattening direction. The receiving groove 511 is used to receive the connector 52 on the adjacent sub-plate 51 when the support structure 50 is in the flattened state.

[0037] Specifically, each sub-board 51 has a connector 52 and a receiving groove 511 for accommodating the connector 52 on both sides along the curling and flattening directions. When the support structure 50 is in the flattened state, the adjacent sub-boards 51 are engaged by the connector 52 and the receiving groove 511, thereby maintaining the support structure 50 in a flattened state and providing horizontal support for the flexible display panel 60. When the support structure 50 is in the retracted state, since the adjacent sub-boards 51 change from a horizontal state to a certain angle, and the connector 52 is fixedly connected to the sub-board 51, the connector 52 disengages from the receiving groove 511 of the adjacent sub-board 51, thus not affecting the curling of each sub-board 51 around the rotating screen assembly.

[0038] In one specific embodiment, each sub-board 51 has two symmetrically arranged connectors 52 and two symmetrically arranged receiving grooves 511 to improve the connection stability of adjacent sub-boards 51 in the flattened state.

[0039] In one embodiment, please continue to see Figure 5 The side surface of the first support portion 521 has a spring pin 523 that can extend and retract into the first support portion 521; the receiving groove 511 includes a first receiving groove 5111 for receiving the first support portion 521 and a second receiving groove 5112 for receiving the second support portion 522. The side wall of the first receiving groove 5111 has a clearance portion 5113. When the support structure 50 is in a flattened state, the first support portion 521 and the second support portion 522 are respectively received in the first receiving groove 5111 and the second receiving groove 5112, and the spring pin 523 is received in the clearance portion 5113 and engaged with the clearance portion 5113. Specifically, by providing the spring pin 523 on the first support portion 521 and providing the clearance portion 5113 in the first receiving groove 5111, the connection stability of adjacent sub-plates 51 in the flattened state can be further improved.

[0040] In one specific embodiment, the number of spring pins 523 on the first support portion 521 is two and they are symmetrically arranged, and the number of clearance portions 5113 on the first receiving groove 5111 is two and they are symmetrically arranged.

[0041] In one embodiment, the rollable assembly 30 includes a rollable axis 31 (see [link]). Figure 3 ) and drive component 32 (see Figure 6 The fixed end A1 is connected to the side wall of the scrolling shaft 31; the drive assembly 32 is used to drive the scrolling shaft 31 to rotate so that the support structure 50 gradually unfolds into a flat state and / or gradually curls into a curled state.

[0042] Specifically, the drive component 32 can be a combination of electronic and mechanical drive. For example, the drive component 32 includes a controller (not shown) and a drive motor (not shown). The drive motor is connected to the end of the rotating shaft of the screen 31. The controller controls the drive motor to work based on user operation commands, so that the drive motor drives the screen 31 to rotate, thereby gradually unfolding the support structure 50 into a flat state and / or gradually curling it into a curled state, realizing a fully automatic control mode.

[0043] Or see Figure 6 , Figure 6 A schematic diagram of the structure of an embodiment of the driving component provided in this application; Figure 7 for Figure 6 The exploded view of the drive assembly shown is shown. The drive assembly 32 can be purely mechanically driven and includes a fixed shaft 321, a first rotating component 322, a second rotating component 323, and an elastic element 324.

[0044] Specifically, the fixed shaft 321 passes through the rotating shaft 31 along the axis of rotation of the rotating screen shaft 31. The first end of the fixed shaft 321 is fixedly connected to the housing 10, and the second end of the fixed shaft 321 has a third limiting part 3211. The first rotating member 322 is located on the side of the third limiting part 3211 away from the first end of the fixed shaft 321. The first rotating member 322 has a fourth limiting part 3221 and first connecting parts 3222 located on both sides of the fourth limiting part 3221. The second end of the fixed shaft 321 also passes through the fourth limiting part 3221 and is rotatably connected to the fourth limiting part 3221. The second rotating member 323 includes a limiting plate 3231 and a second connecting part 3232. 3231 is located on the side of the first rotating member 322 away from the third limiting part 3211 and spaced apart from the first rotating member 322. The second end of the fixed shaft 321 is also rotatably connected to the limiting plate 3231. The first connecting part 3222 also has a clearance hole 3223, and the screen scrolling shaft 31 has a clearance groove (not shown) corresponding to the clearance hole 3223. One end of the second connecting part 3232 is fixedly connected to the limiting plate 3231, and the other end passes through the clearance hole 3223 and is fixedly connected to the clearance groove, which is used to drive the screen scrolling shaft 31 to rotate synchronously. The elastic element 324 is sleeved on the fixed shaft 321 and located between the first rotating member 322 and the second rotating member 323.

[0045] Specifically, one of the third limiting part 3211 and the fourth limiting part 3221 has a limiting protrusion B1 and the other has a limiting groove B2, and the sidewalls of the engaging limiting protrusion B1 and the limiting groove B2 are inclined surfaces. When the support structure 50 is in a rolled-up state, the limiting protrusion B1 is embedded in the limiting groove B2, and the elastic element 324 is in a first compressed state. When the support structure 50 is in a flattened state, the limiting protrusion B1 moves along the engaging surface to the top surface of the sidewall of the limiting groove B2, causing the first rotating member 322 to move towards the second rotating member 323. Since the height of the limiting plate 3231 on the screen roller 31 remains unchanged, the elastic element 324 is compressed by the first rotating member 322 towards the second rotating member 323 into a second compressed state. The compression amount of the elastic element 324 in the first compressed state is less than the compression amount in the second compressed state. The first compressed state can be a free state.

[0046] When the user needs to put the display module 40 back into the curled state, push the free end A2 of the display module 40 to make the screen rotation shaft 31 rotate a certain distance, so that the limiting protrusion B1 and the side wall of the limiting groove B2 re-engage. At this time, due to the elastic potential energy of the elastic element 324, the limiting protrusion B1 is pushed to gradually embed into the limiting groove B2, which drives the screen rotation shaft 31 to rotate, realizing the semi-automatic curling of the display module 40.

[0047] In one embodiment, please continue to see Figure 3 Each sub-board 51 has a first limiting part 512 on the surface opposite to the flexible display panel 60, and a second limiting part 311 is provided on the side wall of the screen retractor 31. During the process of the support structure 50 retracting into the receiving cavity 11, the first limiting part 512 on each sub-board 51 and the second limiting part 311 on the screen retractor 30 are engaged one by one to ensure that the display module 40 can be stably retracted into the receiving cavity 11 and to prevent the display module 40 from shifting or wrinkling during the rolling process.

[0048] In one specific embodiment, one of the first limiting part 512 and the second limiting part 311 is a protrusion and the other is a groove.

[0049] Furthermore, the surfaces on which the first limiting part 512 mates with the second limiting part 311, and / or the surfaces on which the second limiting part 311 mates with the first limiting part 512, are provided with magnetic material. Specifically, by providing magnetic material on the surfaces on which the first limiting part 512 and / or the second limiting part 311 mate, the connection stability of the first limiting part 512 and the second limiting part 311 can be improved.

[0050] In one specific embodiment, the protrusion can be made of metal, and the inner surface of the groove is provided with a magnetic material.

[0051] Furthermore, combined with Figure 3 and Figure 4 Each sub-plate 51 is provided with a locking part 513 on both sides along the curling and flattening direction. The locking part 513 extends in the direction away from the flexible display panel 60. The locking part 513 is used to lock at the end of the screen roll shaft 31 when the display module 40 is curled and retracted into the cavity 11, so as to ensure that the display module 40 is stably curled on the screen roll shaft 31 and to prevent the display module 40 from falling off the screen roll shaft 31 when the detection device 100 moves or shakes, which would prevent it from being properly unfolded later.

[0052] In one embodiment, combined with Figure 1 and Figure 3 The free end A2 of the support structure 50 is also provided with a handle 53, and the handle 53 is located outside the receiving cavity 11 when the support structure 50 is in a curled state.

[0053] Specifically, the handle 53 is connected to the free end A2 of the support structure 50, specifically to the last sub-plate 51 of the support structure 50 along the flattening direction. When the support structure 50 is in a rolled-up state, it is located outside the receiving cavity 11, allowing the user to pull the handle 53 to unfold the display module 40 when it is in a rolled-up state. The connection method between the handle 53 and the support structure 50 is not limited; it can be connected via a connector 52 engaging with the receiving groove 511, or it can be a direct connection.

[0054] Unlike existing technologies, the testing equipment 100 provided in this application includes a display module 40 that can be rolled up or unfolded around a rollable assembly 30, thereby enabling large-screen display on a smaller device and providing consumers with more complete testing data. In addition, the display module 40 includes a flexible display panel 60 and a support structure 50 for supporting the flexible display panel 60 in a flattened state, providing horizontal support for the flexible display panel 60 and improving the user experience. Furthermore, the rollable assembly 30 includes a rollable shaft 31 and a drive assembly 32, which can drive the rollable shaft 31 to rotate, realizing semi-automatic or fully automatic rolling and unfolding of the display module 40.

[0055] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A detection device, characterized by The application relates to a display module. The display module comprises a housing, a detection assembly arranged in the housing and used for detecting a related parameter of a sample to be detected, a screen rolling assembly arranged in a receiving cavity of the housing and rotatably connected with the housing, and a display module electrically connected with the detection assembly. The display module comprises opposite fixed ends and free ends, the fixed ends are fixed to the screen rolling assembly, the display module can be rolled around the screen rolling assembly to be in a rolled state, and the display module can be unfolded around the screen rolling assembly to be in an unfolded state. When the display module changes from the rolled state to the unfolded state, the free ends extend out of the receiving cavity through an opening on a side wall of the housing. The display module further comprises a support structure and a flexible display panel. The support structure has the fixed ends and the free ends, and the support structure comprises a plurality of sub-panels arranged along a rolling direction or an unfolding direction and connecting members connecting adjacent two sub-panels. The flexible display panel is electrically connected with the detection assembly and arranged on a surface of the support structure, and the flexible display panel can be rolled and unfolded synchronously with the support structure. The connecting members are located on a side of the sub-panels away from the flexible display panel, and the connecting members support the adjacent two sub-panels to keep the adjacent two sub-panels in the same horizontal plane in the unfolded state of the support structure. A first limiting part is arranged on a surface of each sub-panel away from the flexible display panel, and a second limiting part is arranged on the screen rolling assembly. The first limiting part on each sub-panel and the second limiting part on the screen rolling assembly are embedded one by one in the process of retracting the support structure into the receiving cavity, so that the display module is prevented from being displaced or wrinkled in the rolling process.

2. The detection device of claim 1, wherein, Each connecting member comprises a first supporting part and a second supporting part perpendicular to the first supporting part. One end of the first supporting part is fixedly connected with the sub-panel along one side of the sub-panel in the rolling or unfolding direction, and the other end extends out of the sub-panel and is connected with the second supporting part.

3. The detection device of claim 2, wherein, The other side of each sub-panel in the rolling or unfolding direction is provided with a containing groove matched with the shape of the connecting member.

4. The detection device of claim 3, wherein, The side surface of the first supporting part has a spring needle.

5. The detection device of claim 1, wherein, The containing groove comprises a first containing groove for containing the first supporting part and a second containing groove for containing the second supporting part.

6. The detection device of claim 1, wherein, The side wall of the first containing groove has a space part.

7. The detection device of claim 5, wherein, The number of the spring needles on the first supporting part is two and symmetrically arranged. One of the first limiting part and the second limiting part is a protrusion, and the other is a groove. The surface of the first limiting part matched with the second limiting part and / or the surface of the second limiting part matched with the first limiting part is provided with a magnetic material. The material of the protrusion is metal, and the inner surface of the groove is provided with a magnetic material.

8. The detection device of claim 2, wherein, The free end of the support structure is further provided with a handle, which is located outside the accommodating cavity when the support structure is in the rolled state.

9. The detection device of claim 2, wherein, The screen rolling assembly comprises a screen rolling shaft and a driving assembly; the fixed end is connected with the side wall of the screen rolling shaft; the driving assembly is used to drive the screen rolling shaft to rotate, so as to gradually expand the support structure into the flattened state and / or gradually roll the support structure into the rolled state.

10. The detection device of claim 9, wherein, The driving assembly comprises: a fixed shaft, which penetrates the screen rolling shaft along the rotation axis of the screen rolling shaft, the first end of the fixed shaft is fixedly connected with the shell, and the second end of the fixed shaft is provided with a third limiting part; a first rotating part, which is located on the side of the third limiting part away from the first end of the fixed shaft, the first rotating part is provided with a fourth limiting part and first connecting parts located on both sides of the fourth limiting part, the second end of the fixed shaft further penetrates the fourth limiting part and is rotationally connected with the fourth limiting part; a second rotating part, which comprises a limiting plate and a second connecting part, the limiting plate is located on the side of the first rotating part away from the third limiting part and is spaced from the first rotating part, and the second end of the fixed shaft is further rotationally connected with the limiting plate; the first connecting part is provided with a displacement hole, the screen rolling shaft is provided with a displacement slot, one end of the second connecting part is fixedly connected with the limiting plate, and the other end penetrates the displacement hole and is fixedly connected with the displacement slot; a resilient element, which is sleeved on the fixed shaft and located between the first rotating part and the second rotating part; wherein one of the third limiting part and the fourth limiting part is provided with a limiting protrusion, and the other is provided with a limiting recess, and the side wall engaged by the limiting protrusion and the limiting recess is a bevel; when the support structure is in the rolled state, the limiting protrusion is embedded in the limiting recess, and the resilient element is in a first compressed state; when the support structure is in the flattened state, the limiting protrusion moves to the top surface of the side wall of the limiting recess, and the resilient element is in a second compressed state; the compression amount of the resilient element in the first compressed state is less than the compression amount in the second compressed state.

11. The detection device of claim 1, wherein, The detection assembly comprises a sampling element and a detection module, the sampling element is used to collect the sample to be detected, the detection module is used to detect the related parameters of the sample to be detected, and the detection module is electrically connected with the display module, and the display module is used to visualize the related parameters detected by the detection module.

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