A portable gas detector

Abstract

The present invention discloses a portable gas detector, which relates to the field of gas detection technology, including a winding unit, including a winding sleeve, the winding sleeve including a connecting plate arranged inside the winding sleeve, and a connecting shaft arranged on the upper surface of the connecting plate, a gripping piece arranged on the inner side of the winding sleeve, the gripping piece including a vertical rod, and a winding roller arranged on the outer side of the connecting shaft; an anti-slip unit including a sliding cover, a slide plate arranged on the inner side of the sliding cover, and a tightening belt arranged on the end of the slide plate; the surface of the gripping piece contacts the end of the slide plate. The beneficial effect of the present invention is that the hose can be wound around the outer side of the winding roller to ensure that the hose is more neat during use; at the same time, the anti-slip unit can ensure that the device can be closely attached to the user's hand, effectively preventing the device from slipping out of the hand; thereby making it more convenient for the staff to use the device.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, in particular to a portable gas detector. Background Art

[0002] Portable gas detectors are devices used to detect the concentration of harmful gases in the environment. They are widely used in industrial safety testing, indoor air quality testing, environmental protection testing and other fields. They can be single-gas or multi-gas detectors and can detect a variety of gases including VOCs, oxygen, toxic gases and combustible gases.

[0003] Portable gas detection instruments are commonly operated by hand in laboratory gas detection. However, when it is necessary to detect the gas concentration in a higher area in the room, the staff needs to connect a certain length of hose to extend the detection end. Although the extended hose is convenient for high-altitude detection, it is cumbersome to store after use; it is inconvenient for the staff to store the hose. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a portable gas detector, which is designed to solve the problem that the connecting hose of the existing gas detector is inconvenient to store.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a portable gas detector, comprising a winding unit, comprising a winding sleeve, the winding sleeve comprising a connecting plate arranged inside the winding sleeve, a connecting shaft arranged on the upper surface of the connecting plate, and a holding member arranged on the inner side of the winding sleeve, the holding member comprising a vertical rod, a winding roller arranged on the outer side of the connecting shaft, a sliding sleeve arranged on the outer side of the vertical rod, an extrusion block arranged on one side of the sliding sleeve, a limit block arranged on the surface of the connecting plate, and a fixed block arranged on one side of the limit block;

[0007] The anti-slip unit comprises a sliding cover, a sliding plate arranged inside the sliding cover, and a tightening belt arranged at the end of the sliding plate;

[0008] The surface of the gripping member contacts the end of the slide plate.

[0009] As a preferred solution of the portable gas detector of the present invention, the holding member further comprises a disc arranged at the bottom of the upright pole, a connecting rod arranged at the side wall of the disc, a holding rod arranged at the end of the connecting rod, and a first spring arranged at the side wall of the connecting rod;

[0010] One end of the first spring is connected to the connecting rod, and the other end thereof is in contact with the inner wall of the winding sleeve;

[0011] The connecting rod passes through the winding sleeve and extends to the outside thereof;

[0012] The interior of the connecting shaft is a hollow structure, and the vertical rod passes through the connecting shaft and extends into the interior thereof;

[0013] The connecting shaft is coaxially arranged with the vertical rod.

[0014] As a preferred solution of the portable gas detector of the present invention, the sliding sleeve comprises an extrusion portion arranged at its end, an arc-shaped groove opened on the side wall of the sliding sleeve, and a protrusion arranged on the side wall of the end of the sliding sleeve;

[0015] The side wall of the connecting shaft is provided with a sliding groove;

[0016] The protrusion is adapted to the slide groove;

[0017] The sliding sleeve is arranged on the inner side of the connecting shaft, and the sliding sleeve is arranged on the outer side of the vertical rod;

[0018] The sliding sleeve moves along the inner track of the sliding groove.

[0019] As a preferred solution of the portable gas detector of the present invention, wherein: the side wall of the upright pole is connected with a guide column, and the guide column is adapted to the arc groove;

[0020] The extrusion block includes a trapezoidal block disposed at an end thereof;

[0021] The extrusion block passes through the connecting shaft and the winding roller and extends to the outside of the winding roller;

[0022] The extrusion portion surface contacts the trapezoidal block end.

[0023] As a preferred embodiment of the portable gas detector of the present invention, the winding roller comprises a circular sleeve arranged at its end, and teeth arranged in a circumferential array on the inner wall of the circular sleeve;

[0024] The winding roller sleeve is arranged on the outside of the connecting shaft; the end of the winding roller contacts the inner wall of the winding sleeve; and the bottom of the circular sleeve contacts the surface of the connecting plate.

[0025] As a preferred solution of the portable gas detector of the present invention, wherein: the limit block includes a second spring arranged on its side wall;

[0026] The bottom of the limit block is connected to a cylinder, and the limit block rotates along the axis direction of the cylinder;

[0027] The second spring pushes the end of the limit block to be inserted between adjacent tooth gaps.

[0028] As a preferred solution of the portable gas detector of the present invention, wherein: the fixing block is arranged on the surface of the connecting plate;

[0029] One end of the extrusion block away from the trapezoidal block contacts the side wall of the limiting block;

[0030] The end of the limit block is staggered with the position of the teeth.

[0031] As a preferred solution of the portable gas detector of the present invention, wherein: the sliding cover includes a track arranged inside the sliding cover;

[0032] The slide plate includes a slider disposed at the bottom thereof, and a third spring disposed on a side wall of the slider;

[0033] The bottom of the slide plate is in contact with the surface of the slide cover;

[0034] The slider is slidably connected to the track.

[0035] As a preferred solution of the portable gas detector of the present invention, wherein: the tightening belt is made of elastic material;

[0036] One end of the tightening belt is connected to the slider, and the other end is fixed to the inner side of the sliding cover;

[0037] The tightening belt passes through the sliding cover and extends to the outside thereof.

[0038] As a preferred solution of the portable gas detector of the present invention, the detection unit includes a detector body and a detection head, and a hose arranged at the end of the detector body; the detector body and the detection head are connected through the hose;

[0039] The hose passes through the winding sleeve and extends to the outside thereof, and the hose is wound around the outer wall of the winding roller.

[0040] The beneficial effects of the present invention are as follows: the present invention can wind the hose around the outside of the winding roller, ensuring that the hose is more neat during use; at the same time, the anti-slip unit can ensure that the device can fit tightly on the user's hand, effectively preventing the device from slipping out of the hand; thereby making it more convenient for the staff during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 This is a schematic diagram of the structure of a portable gas detector.

[0043] Figure 2 This is a schematic diagram of the connection structure between the reel cover of a portable gas detector and the detector body.

[0044] Figure 3 This is a schematic diagram of the limit block and winding roller limit structure of a portable gas detector.

[0045] Figure 4 Portable gas detector Figure 3 A partial enlarged view of point A.

[0046] Figure 5 This is a schematic diagram of the extension structure of the tightening belt of the portable gas detector.

[0047] Figure 6 Portable gas detector Figure 5 A partial enlarged view of point B.

[0048] Figure 7 Schematic diagram of the explosion structure of a portable gas detector.

[0049] Figure 8 Portable gas detector Figure 7 A partial enlarged view of point C.

[0050] Fig. 9 Portable gas detector Figure 7 A partial enlarged view of point D.

[0051] In the figure: 100, winding unit; 101, winding sleeve; 1011, connecting plate; 1012, connecting shaft; 10121, slide; 102, gripping member; 1021, gripping rod; 1022, connecting rod; 1023, disc; 1024, vertical rod; 10241, guide column; 1025, first spring; 103, winding roller; 1031, circular sleeve; 1032, teeth; 104, sliding sleeve; 1041, extrusion Pressing part; 1042, arc groove; 1043, protrusion; 105, extrusion block; 1051, trapezoidal block; 106, limit block; 1061, second spring; 107, fixing block; 200, anti-slip unit; 201, sliding cover; 2011, track; 202, slide plate; 2021, slider; 2022, third spring; 203, tightening belt; 300, detection unit; 301, detection instrument body; 302, detection head. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0055] Example 1

[0056] Reference Figure 3 to Figure 9 , which is the first embodiment of the present invention, and this embodiment provides a portable gas detector, which includes a winding unit 100, including a winding sleeve 101, the winding sleeve 101 includes a connecting plate 1011 arranged therein, and a connecting shaft 1012 arranged on the upper surface of the connecting plate 1011, and a holding piece 102 arranged on the inner side of the winding sleeve 101, the holding piece 102 includes a vertical rod 1024, a winding roller 103 arranged on the outer side of the connecting shaft 1012, a sliding sleeve 104 arranged on the outer side of the vertical rod 1024, an extrusion block 105 arranged on one side of the sliding sleeve 104, a limit block 106 arranged on the surface of the connecting plate 1011, and a fixed block 107 arranged on one side of the limit block 106.

[0057] It should be noted that the winding sleeve 101 is a cylindrical structure with a hollow interior, and the connecting plate 1011 is arranged inside the winding sleeve 101; the winding sleeve 101 is divided into an upper cavity and a lower cavity by the connecting plate 1011; the connecting shaft 1012 is fixedly connected to the connecting plate 1011, and the interior of the connecting shaft 1012 is a hollow structure, and the vertical rod 1024 is arranged inside the connecting shaft 1012; the gripping member 102 rotates along the axial direction of the connecting shaft 1012; the winding roller 103 is sleeved on the outside of the connecting shaft 1012, and the winding roller 103 is movably connected to the connecting shaft 1012; the sliding sleeve 10 4 is in contact with the connecting shaft 1012, and the inner wall of the sliding sleeve 104 is in contact with the side wall of the vertical rod 1024; the set limit block 106, under the normal condition, is pushed to flip the limit block 106 under the rebound force of the second spring 1061, so that the end of the limit block 106 is inserted into the gap between the two adjacent groups of teeth 1032; the limit block 106 cooperates with the teeth 1032, so that the winding roller 103 rotating clockwise can be limited; thereby, it is more convenient for the staff to wind the hose on the outside of the winding roller 103, and ensure that the hose is fixed on the outside of the winding roller 103, so as to effectively prevent the hose from loosening.

[0058] Furthermore, the anti-slip unit 200 includes a sliding cover 201 , a slide plate 202 disposed inside the sliding cover 201 , and a tightening belt 203 disposed at the end of the slide plate 202 ; the surface of the gripping member 102 is in contact with the end of the slide plate 202 .

[0059] It should be noted that the sliding cover 201 is snap-connected to the detector body 301; the sliding plate 202 is slidingly connected to the sliding cover 201, and one end of the tightening belt 203 is connected to the end of the sliding plate 202. Under normal circumstances, the tightening belt 203 is tightly attached to the side wall of the sliding cover 201; and the tightening belt 203 is made of elastic material, so that the tightening belt 203 can tightly attach the palm of the staff to the sliding cover 201, effectively preventing the device from falling off the palm of the staff.

[0060] When in use, the staff presses the gripping member 102 to rotate the gripping member 102 along the axis direction of the vertical rod 1024, and the rotation of the vertical rod 1024 drives the sliding sleeve 104 to move, and the movement of the sliding sleeve 104 drives the extrusion block 105 to move, and the end of the extrusion block 105 contacts the side wall of the limit block 106, so that the limit block 106 flips, and the end of the limit block 106 moves to the side away from the teeth 1032; then the winding roller 103 can be rotated counterclockwise at this time; thereby, the hose wound on the outside of the winding roller 103 can be pulled out from the inside of the winding sleeve 101, so that the hose extends to a certain length; so that the detection device can be suitable for gas detection at different heights;

[0061] During the process of pressing the gripping piece 102, the side wall of the gripping piece 102 squeezes the slide plate 202 to move, so that the movement of the slide plate 202 drives the tightening belt 203 to move, thereby ensuring that the part extending out of the tightening belt 203 is in a relaxed state; thereby making it easier to insert the palm into the gap between the tightening belt 203 and the sliding cover 201. After the process of releasing the gripping piece 102, the tightening belt 203 can press the palm and the sliding cover 201 tightly, which can effectively prevent the sliding cover 201 from falling off the palm of the staff.

[0062] In summary, the present invention can wrap the hose around the outside of the winding roller to ensure that the hose is more neat during use; at the same time, the anti-slip unit can ensure that the device can fit tightly on the user's hand, effectively preventing the device from slipping out of the hand; thereby making it more convenient for staff to use it.

[0063] Example 2

[0064] Reference Figures 1 to 9, which is the second embodiment of the present invention, and which is different from the first embodiment in that: it also includes, in the previous embodiment, the portable gas detector includes, the gripping member 102 also includes a disk 1023 arranged at the bottom of the vertical rod 1024, a connecting rod 1022 arranged on the side wall of the disk 1023, a gripping rod 1021 arranged at the end of the connecting rod 1022, and a first spring 1025 arranged on the side wall of the connecting rod 1022; one end of the first spring 1025 is connected to the connecting rod 1022, and the other end thereof is in contact with the inner wall of the winding sleeve 101; the connecting rod 1022 penetrates the winding sleeve 101 and extends to the outside thereof; the interior of the connecting shaft 1012 is a hollow structure, and the vertical rod 1024 penetrates the connecting shaft 1012 and extends to the inside thereof;

[0065] The connecting shaft 1012 is coaxially arranged with the vertical rod 1024 .

[0066] It should be noted that the gripping rod 1021 and the connecting rod 1022 are welded and fixed, and the connecting rod 1022 is set to penetrate the winding sleeve 101 and extend to the outside, so as to ensure that the staff can be located on the outside of the winding sleeve 101 to drive the vertical rod 1024 to rotate; the disc 1023 and the connecting rod 1022 are welded and fixed, and the disc 1023 and the vertical rod 1024 are welded and fixed; the staff pulls the gripping rod 1021 from the outside to make the vertical rod 1024 flip along the axial direction of the connecting shaft 1012; the connecting rod 1022 can be squeezed to flip by the set first spring 1025. Under normal circumstances, under the action of the rebound force of the first spring 1025, the connecting rod 1022 is pushed to flip, so that the position of the surface of the gripping rod 1021 is staggered with the position of the sliding cover 201.

[0067] Furthermore, the sliding sleeve 104 includes an extrusion portion 1041 arranged at its end, an arc groove 1042 opened on the side wall of the sliding sleeve 104, and a protrusion 1043 arranged on the side wall of the end of the sliding sleeve 104; a sliding groove 10121 is opened on the side wall of the connecting shaft 1012; the protrusion 1043 is adapted to the sliding groove 10121; the sliding sleeve 104 is connected to the inner side of the connecting shaft 1012, and the sliding sleeve 104 is sleeved on the outer side of the vertical rod 1024; the sliding sleeve 104 moves along the internal track of the sliding groove 10121.

[0068] It should be noted that the outer wall of the sliding sleeve 104 contacts the inner wall of the connecting shaft 1012, and the inner wall of the sliding sleeve 104 contacts the side wall of the vertical rod 1024; the protrusion 1043 is adapted to the slide groove 10121, and the protrusion 1043 and the slide groove 10121 are slidingly connected; the sliding sleeve 104 moves along the inner wall track of the slide groove 10121.

[0069] Furthermore, the side wall of the vertical rod 1024 is connected to a guide column 10241, which is adapted to the arc groove 1042; the extrusion block 105 includes a trapezoidal block 1051 arranged at its end; the extrusion block 105 passes through the connecting shaft 1012 and the winding roller 103 and extends to the outside of the winding roller 103; the surface of the extrusion portion 1041 is in contact with the end of the trapezoidal block 1051.

[0070] It should be noted that the guide column 10241 is fixedly connected to the vertical rod 1024, and the guide column 10241 passes through the arc groove 1042 and extends into the interior thereof; the cooperation between the guide column 10241 and the arc groove 1042, as well as the cooperation between the protrusion 1043 and the slide groove 10121, can ensure that the rotation of the vertical rod 1024 drives the sliding sleeve 104 to move along the trajectory inside the slide groove 10121; the extrusion portion 1041 is a conical surface, the sliding sleeve 104 moves in the vertical direction, and the surface of the extrusion portion 1041 squeezes the end of the trapezoidal block 1051; the sliding sleeve 104 moves in the vertical direction, which can push the extrusion block 105 to move in the horizontal direction.

[0071] Furthermore, the winding roller 103 includes a circular sleeve 1031 arranged at its end, and teeth 1032 arranged in a circular array on the inner wall of the circular sleeve 1031; the winding roller 103 is sleeved on the outside of the connecting shaft 1012; the end of the winding roller 103 contacts the inner wall of the winding sleeve 101; the bottom of the circular sleeve 1031 contacts the surface of the connecting plate 1011.

[0072] It should be noted that the winding roller 103 is movably connected to the connecting shaft 1012, and the teeth 1032 are arranged on the inner wall of the circular sleeve 1031 and distributed in a circular array, so that an internal gear structure can be formed inside the teeth 1032; and the winding roller 103 is sleeved on the outside of the connecting shaft 1012, and the winding roller 103 rotates along the axial direction of the connecting shaft 1012.

[0073] Furthermore, the limit block 106 includes a second spring 1061 arranged on its side wall; a cylinder is connected to the bottom of the limit block 106, and the limit block 106 rotates along the axis of the cylinder; the second spring 1061 pushes the end of the limit block 106 to be inserted into the gap between adjacent teeth 1032.

[0074] It should be noted that the limit block 106 is an L-shaped structure, and the end of the extrusion block 105 squeezes the side wall of the limit block 106, so that the limit block 106 rotates along the axial direction of the cylinder; and one end of the second spring 1061 is welded and fixed to the side wall of the limit block 106, and the other end is in contact with the surface of the fixed block 107; under normal circumstances, under the action of the rebound force of the second spring 1061, the end of the limit block 106 is pushed to insert into the gap between the teeth 1032, so that the counterclockwise rotation of the winding roller 103 can be limited.

[0075] Furthermore, the fixing block 107 is arranged on the surface of the connecting plate 1011 ; one end of the extrusion block 105 away from the trapezoidal block 1051 contacts the side wall of the limit block 106 ; the end of the limit block 106 is staggered from the position of the teeth 1032 .

[0076] It should be noted that when the extrusion block 105 moves in the horizontal direction, the end of the extrusion block 105 squeezes the side wall of the limit block 106, so that the limit block 106 rotates along the axial direction of the cylinder, so that the end of the limit block 106 is away from the gap between the two adjacent groups of teeth 1032, thereby ensuring that the counterclockwise rotation of the winding roller 103 is no longer restricted.

[0077] When in use, when the staff needs to adjust the position of the detection head 302 using the device, the staff holds the grip 1021, and after the grip 1021 is subjected to force, it drives the vertical rod 1024 to rotate along the axial direction of the connecting shaft 1012; the rotation of the vertical rod 1024 drives the guide column 10241 to rotate, and the side wall of the guide column 10241 squeezes the inner wall of the arc groove 1042; so that the sliding sleeve 104 moves along the track of the sliding groove 10121, the sliding sleeve 104 moves downward, and the end of the squeezing portion 1041 contacts the end of the trapezoidal block 1051 , the trapezoidal block 1051 moves in the horizontal direction after being compressed, and the end of the extrusion block 105 contacts the side wall of the limit block 106. After the limit block 106 is compressed, the limit block 106 rotates along the axis direction of the cylinder, so that the end of the limit block 106 is away from the position of the tooth 1032; at this time, the second spring 1061 is in a compressed state; the end of the limit block 106 is away from the position of the tooth 1032, and the counterclockwise rotation of the winding roller 103 is no longer restricted; the hose wound on the outside of the winding roller 103 can be released to an appropriate length;

[0078] Under normal conditions, under the action of the rebound force of the first spring 1025, the connecting rod 1022 is pushed to flip, so that the position between the grip rod 1021 and the sliding cover 201 is staggered; as the vertical rod 1024 rotates, the guide column 10241 is driven to squeeze the inside of the arc groove 1042, so that the sliding sleeve 104 moves along the vertical direction of the sliding groove 10121, so that the sliding sleeve 104 moves upward; so that the end of the squeezing block 105 no longer squeezes the side wall of the limit block 106; then, under the action of the rebound force of the second spring 1061, the end of the limit block 106 is pushed to be stuck between two adjacent groups of teeth 1032; thereby, the winding roller 103 can be effectively prevented from rotating counterclockwise.

[0079] In summary, by cooperating between the holding piece 102 and the sliding sleeve 104, the limitation on the winding roller 103 can be released; it can be more convenient for the staff to take the hose out from the inside of the winding sleeve 101; at the same time, the action of holding the handle 1021 is the same as the action of the staff holding the device, which can better facilitate the staff to use it.

[0080] Example 3

[0081] Reference Figure 1 to Figure 5 , which is the third embodiment of the present invention, is different from the previous two embodiments in that: the sliding cover 201 includes a track 2011 arranged inside it; the slide plate 202 includes a slider 2021 arranged at the bottom thereof, and a third spring 2022 arranged on the side wall of the slider 2021; the bottom of the slide plate 202 is in contact with the surface of the sliding cover 201; the slider 2021 is slidably connected to the track 2011.

[0082] It should be noted that the sliding cover 201 is compatible with the outer shell structure of the detector body 301. During use, the sliding cover 201 is snap-connected with the detector body 301 to ensure that the staff feels comfortable using it; the slide plate 202 can move along the surface of the sliding cover 201, and the movement of the slide plate 202 can squeeze the third spring 2022; so that the third spring 2022 is in a compressed state, and the slider 2021 is slidingly connected to the track 2011, thereby ensuring that when the grip 1021 squeezes the slide plate 202, the slide plate 202 can move along the track inside the track 2011.

[0083] Furthermore, one end of the tightening belt 203 is connected to the slider 2021 , and the other end is fixed to the inner side of the sliding cover 201 ; the tightening belt 203 passes through the sliding cover 201 and extends to the outer side thereof.

[0084] It should be noted that the interior of the tightening belt 203 is covered with a flexible metal plate; under normal circumstances, the third spring 2022 pushes the slide plate 202 to move, and the tightening belt 203 is in a tensioned state. When the third spring 2022 is in a compressed state, the tightening belt 203 is in a relaxed state; this makes it easier for the staff to insert their hands between the tightening belt 203 and the sliding cover 201.

[0085] Furthermore, the detection unit 300 includes a detector body 301 and a detection head 302, and a hose arranged at the end of the detector body 301; the detector body 301 and the detection head 302 are connected by the hose; the hose passes through the winding sleeve 101 and extends to its outside, and the hose is wrapped around the outer wall of the winding roller 103.

[0086] It should be noted that the winding sleeve 101 is located in the shell setting of the detector body 301, the winding sleeve 101 and the detector body 301 are detachably connected, and the sliding cover 201 and the detector body 301 are snap-connected; thereby, the positions of the winding sleeve 101 and the detector body 301 are fixed, and the positions of the sliding cover 201 and the detector body 301 are fixed; and the set hose is wound and collected inside the winding sleeve 101.

[0087] During use, when the staff member holds the grip rod 1021, the side wall of the grip rod 1021 pushes the end of the slide plate 202 to move, and the slide block 2021 moves along the track of the track 2011. During the movement of the slide block 2021, the third spring 2022 is in a compressed state; during the movement of the slide block 202, the tightening belt 203 is pushed to move, so that the tightening belt 203 moves to the outside of the slide cover 201; at this time, the tightening belt 203 and the slide cover 201 are in a loose state, and then, the palm is inserted between the tightening belt 203 and the slide cover 201, and then the force of holding the grip rod 1021 is reduced. Under the action of the rebound force of the third spring 2022, the tightening belt 203 is pressed tightly between the palm and the slide cover 201, and at the same time, the grip rod 1021 contacts the palm of the staff member. At this time, the staff member can effectively prevent the tool from falling off the hand, so that the tool is fixed and tightly attached to the inside of the palm.

[0088] In summary, by cooperating between the slide plate 202 and the grip 102, the palm can be passed through the inner side of the tightening belt 203; and then the palm is pressed tightly between the tightening belt 203 and the sliding cover 201, thereby effectively preventing the device from falling off from the inside of the staff's palm; and it can better facilitate the staff to free up their hands to do other work.

[0089] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable gas detector, characterized in that: include, A winding unit (100) comprises a winding sleeve (101), the winding sleeve (101) comprising a connecting plate (1011) arranged inside the winding sleeve, a connecting shaft (1012) arranged on the upper surface of the connecting plate (1011), a holding member (102) arranged on the inner side of the winding sleeve (101), the holding member (102) comprising a vertical rod (1024), a winding roller (103) arranged on the outer side of the connecting shaft (1012), a sliding sleeve (104) arranged on the outer side of the vertical rod (1024), an extrusion block (105) arranged on one side of the sliding sleeve (104), a limiting block (106) arranged on the surface of the connecting plate (1011), and a fixing block (107) arranged on one side of the limiting block (106); The holding member (102) further comprises a disk (1023) arranged at the bottom of the vertical rod (1024), a connecting rod (1022) arranged on the side wall of the disk (1023), a holding rod (1021) arranged at the end of the connecting rod (1022), and a first spring (1025) arranged on the side wall of the connecting rod (1022); One end of the first spring (1025) is connected to the connecting rod (1022), and the other end thereof is in contact with the inner wall of the winding sleeve (101); The connecting rod (1022) passes through the winding sleeve (101) and extends to the outside thereof; The interior of the connecting shaft (1012) is a hollow structure, and the vertical rod (1024) passes through the connecting shaft (1012) and extends into the interior thereof; The connecting shaft (1012) and the vertical rod (1024) are coaxially arranged; The winding roller (103) comprises a circular sleeve (1031) arranged at the end thereof, and teeth (1032) arranged in a circumferential array on the inner wall of the circular sleeve (1031); The winding roller (103) is sleeved on the outside of the connecting shaft (1012); the end of the winding roller (103) is in contact with the inner wall of the winding sleeve (101); the bottom of the circular sleeve (1031) is in contact with the surface of the connecting plate (1011); The sliding sleeve (104) comprises an extrusion portion (1041) arranged at an end thereof, an arc-shaped groove (1042) opened on a side wall of the sliding sleeve (104), and a protrusion (1043) arranged on the side wall of the end of the sliding sleeve (104); A sliding groove (10121) is provided on the side wall of the connecting shaft (1012); The protrusion (1043) is adapted to the slide groove (10121); The sliding sleeve (104) is arranged on the inner side of the connecting shaft (1012), and the sliding sleeve (104) is arranged on the outer side of the vertical rod (1024); The sliding sleeve (104) moves along the inner track of the sliding groove (10121); A guide column (10241) is connected to the side wall of the upright pole (1024), and the guide column (10241) is adapted to the arc-shaped groove (1042); The extrusion block (105) comprises a trapezoidal block (1051) arranged at an end thereof; The extrusion block (105) passes through the connecting shaft (1012) and the winding roller (103) and extends to the outside of the winding roller (103); The surface of the extrusion portion (1041) is in contact with the end of the trapezoidal block (1051); The limit block (106) comprises a second spring (1061) arranged on a side wall thereof; The bottom of the limit block (106) is connected to a cylinder, and the limit block (106) rotates along the axis direction of the cylinder; The second spring (1061) is capable of pushing the end of the limit block (106) to be inserted into the gap between adjacent teeth (1032); An anti-slip unit (200) comprising a sliding cover (201), a sliding plate (202) arranged inside the sliding cover (201), and a tightening belt (203) arranged at an end of the sliding plate (202); The sliding cover (201) comprises a track (2011) arranged inside the sliding cover; The slide plate (202) comprises a slider (2021) arranged at the bottom thereof, and a third spring (2022) arranged on a side wall of the slider (2021); The bottom of the slide plate (202) is in contact with the surface of the slide cover (201); The slider (2021) is slidably connected to the track (2011); One end of the tightening belt (203) is connected to the sliding block (2021), and the other end is fixed to the inner side of the sliding cover (201); The tightening belt (203) passes through the sliding cover (201) and extends to the outside thereof; The surface of the holding piece (102) is in contact with the end of the slide plate (202).

2. The portable gas detector according to claim 1, characterized in that: The fixing block (107) is arranged on the surface of the connecting plate (1011); One end of the extrusion block (105) away from the trapezoidal block (1051) contacts the side wall of the limiting block (106); The end of the limit block (106) can be staggered with the position of the tooth (1032).

3. The portable gas detector according to claim 1 or 2, characterized in that: The detection unit (300) comprises a detection instrument body (301), a detection head (302), and a hose arranged at the end of the detection instrument body (301); the detection instrument body (301) and the detection head (302) are connected via the hose; The hose passes through the winding sleeve (101) and extends to the outside thereof, and the hose is wound around the outer wall of the winding roller (103).

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