Cardiovascular internal medicine clinical puncture device

Abstract

The application belongs to the technical field of medical treatment, and particularly relates to a clinical puncture device for cardiovascular internal medicine, which comprises a shell, a loading box fixed in the shell, a plurality of puncture needles arranged in the loading box, a guide shell fixed on one side of the shell, a connecting column slidingly connected in the guide shell, an outlet opening on the side of the shell away from the guide shell, a material-ejecting spring arranged in the loading box, a guide wire hole formed in the connecting column, and the inner diameter of the guide wire hole matching the inner diameter of the puncture needle; a flow guide cover is fixed at the top of the shell, a heating device is installed on one side of the flow guide cover, a water inlet pipe is fixed on the side of the heating device away from the flow guide cover, and the water inlet pipe is connected with an external water supply end; the loading box can store a plurality of puncture needles, the connecting column pushes the joint to butt against the fixing cover when in use, and pushes the puncture needles in the shell out, the connecting column is pulled back to position after use, the first metal spring piece removes the used puncture needles, and the used puncture needles are automatically removed.

Description

Technical Field

[0001] This invention belongs to the field of medical technology, specifically a cardiovascular clinical puncture device. Background Technology

[0002] During the treatment process in the Department of Cardiovascular Medicine, patients may have thrombi or other substances inside their blood vessels, which require treatment of the inside of the blood vessels. In order to treat the inside of the blood vessels, a puncture device is usually used to puncture near the treatment site. The puncture creates a tiny opening in the blood vessel, which makes it easier to insert a guide wire for diagnosis or treatment.

[0003] Existing puncture equipment typically requires manual installation of the puncture needle, followed by removal of the needle after use and disinfection of the connection point. This process involves multiple manual operations by staff, making it cumbersome. When multiple puncture sites are required, manual operation makes it difficult to perform punctures in a timely manner during the procedure, thus affecting the efficiency of the surgery.

[0004] Therefore, the present invention provides a cardiovascular clinical puncture device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The cardiovascular clinical puncture device of the present invention includes an outer shell, a material box fixed inside the outer shell, a plurality of puncture needles arranged inside the material box, a guide shell fixed on one side of the outer shell, a connecting column slidably connected inside the guide shell, an extension opening on the side of the outer shell away from the guide shell, a top spring arranged inside the material box, a guide wire hole opened inside the connecting column, the inner diameter of the guide wire hole matching the inner diameter of the puncture needle, a slide bar fixed at the top and bottom of the connecting column, and a first slide rail opened at the top and bottom of the guide shell, the slide bar being slidably connected inside the first slide rail;

[0007] A flow guide is fixed to the top of the outer shell, a heating device is installed on one side of the flow guide, and a water inlet pipe is fixed to the side of the heating device away from the flow guide, and the water inlet pipe is connected to an external water supply.

[0008] When the connecting post is pushed into the interior of the outer shell from the guide shell, the connecting post will push the puncture needle out from the protrusion.

[0009] Preferably, one end of the connecting column is fixed with a connector, and one end of the puncture needle is fixed with a fixing cover. The fixing cover can be inserted into the connector, and the connector also has a guide wire hole inside.

[0010] Preferably, multiple third spring pieces are fixed at equal intervals on the outer side of the connector, and two annular grooves are opened inside the fixing cover, so that the third spring pieces can be engaged inside the annular grooves.

[0011] Preferably, a gap is provided between the end of the connector and the end of the fixing cover, and a first metal spring is fixed at the protrusion of the outer shell;

[0012] Specifically, when the fixing cover extends from inside the outer shell, it pushes the first metal spring to deform. When the end of the first metal spring gets stuck in the gap between the fixing cover and the connector, it pulls the connecting column to disengage the fixing cover from the connector.

[0013] Preferably, a top plate is fixed to the top of the top spring, the top plate can contact the fixed cover, and a support frame is provided inside the outer shell;

[0014] The fixing cover can be locked inside the support frame.

[0015] Preferably, a first storage groove is provided on one side of the outer shell, a support frame is rotatably connected inside the first storage groove, a first coil spring is fixed to the outside of the rotating shaft of the support frame, and the other end of the first coil spring is fixedly connected to the outer shell.

[0016] When the connecting column pushes the connector into the fixed cover, the first coil spring provides support to the support frame. After the connector is connected to the fixed cover, it continues to push the connecting column to make the support frame rotate into the first storage slot.

[0017] Preferably, a fixing plug is inserted into one side of the material box, and both the top and bottom ends of the fixing plug are provided with protrusions. The protrusions are provided with matching slots inside, and the protrusions and slots can be engaged and connected. The end of the top material spring away from the top material plate is fixedly connected to the fixing plug.

[0018] Preferably, a second metal spring is fixed on one side of the connecting column, a second slide is provided inside the guide shell, a sliding baffle is slidably connected inside the second slide, and a fixing strip is fixed in the middle of the sliding baffle near the connecting column.

[0019] The sliding baffle can seal the opening of the filling box.

[0020] Preferably, a clamping head is fixed at one end of the sliding baffle near the support frame, and both sides of the clamping head can contact the outer side of the fixed cover.

[0021] Preferably, a second storage groove is provided inside the outer casing on the side near the protrusion. A sealing plate is rotatably connected inside the second storage groove. A second coil spring is fixed to the end of the rotating shaft of the sealing plate, and the other end of the second coil spring is fixedly connected to the outer casing.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The cardiovascular clinical puncture device of the present invention can store multiple puncture needles through a loading box. When in use, the connecting column pushes the connector to align with the fixing cover and pushes out the puncture needle inside the shell. After use, the connecting column is pulled to reset, and the first metal spring removes the used puncture needle, thereby realizing automatic removal of the used puncture needle.

[0024] 2. The cardiovascular clinical puncture device of the present invention heats the water flow input through the inlet pipe through a heating device and inputs it into the interior of the outer shell through a guide shroud. This allows for the input of high-temperature water flow into the interior of the outer shell, thereby cleaning the connector and preventing patient blood residue on the surface of the connector after use. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 This is a schematic diagram of the puncture needle extending according to the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the outer shell in this invention;

[0029] Figure 4 yes Figure 3 A partial structural diagram at point A in the middle;

[0030] Figure 5 This is a schematic diagram of the support frame structure in this invention;

[0031] Figure 6 This is a schematic diagram of the sliding baffle structure in this invention;

[0032] Figure 7 This is a schematic diagram of the first metal spring structure in this invention;

[0033] Figure 8 This is a schematic diagram of the internal structure of the fixed cover in this invention.

[0034] In the diagram: 1. Outer shell; 11. Guide shell; 12. Material box; 121. Fixing plug; 122. Protrusion; 123. Top spring; 124. Top plate; 125. Sliding baffle; 126. Material clamping head; 127. Fixing strip; 13. Puncture needle; 131. Fixing cover; 132. Annular groove; 14. First storage groove; 141. First slide rail; 142. Second slide rail; 143. Support frame; 144. First coil spring; 15. Second storage groove; 151. Sealing plate; 152. Second coil spring; 16. First metal spring; 2. Heating device; 21. Flow guide; 22. Water inlet pipe; 3. Connecting column; 31. Sliding strip; 32. Second metal spring; 33. Connecting joint; 331. Third spring; 34. Guide wire hole. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 8 As shown in the embodiment of the present invention, a cardiovascular clinical puncture device includes a housing 1, a material box 12 fixed inside the housing 1, a plurality of puncture needles 13 disposed inside the material box 12, a guide shell 11 fixed on one side of the housing 1, a connecting post 3 slidably connected inside the guide shell 11, an extension opening on the side of the housing 1 away from the guide shell 11, a top spring 123 disposed inside the material box 12, a guide wire hole 34 disposed inside the connecting post 3, the inner diameter of the guide wire hole 34 matching the inner diameter of the puncture needles 13, a slide bar 31 fixed at the top and bottom of the connecting post 3, and a first slide rail 141 disposed at the top and bottom of the guide shell 11, the slide bar 31 being slidably connected inside the first slide rail 141;

[0037] A flow guide 21 is fixed to the top of the outer shell 1. A heating device 2 is installed on one side of the flow guide 21. A water inlet pipe 22 is fixed on the side of the heating device 2 away from the flow guide 21. The water inlet pipe 22 is connected to an external water supply end.

[0038] When the connecting post 3 is pushed into the interior of the outer shell 1 from the guide shell 11, the connecting post 3 will push the puncture needle 13 out from the protrusion.

[0039] During cardiovascular treatment, punctures are often performed near the affected area to facilitate diagnosis or treatment. During the puncture, the operator holds the guide shell 11, and the loading box 12 is filled with puncture needles 13. Before use, the operator presses the push block on one side of the connecting post 3 and pushes the connecting post 3 towards the outer shell 1. The connecting post 3 then extends into the outer shell 1, pushing out the puncture needle 13 inside. The operator, holding the guide shell 11, can move the extended puncture needle 13. The puncture needle 13 is then inserted into the cardiovascular area near the site requiring diagnosis or treatment. After insertion, a guidewire is inserted into the cardiovascular cavity. The guidewire is then inserted into the guidewire hole 34 and pushed towards the puncture needle 13. The guide wire is inserted into the patient's cardiovascular system through the puncture needle 13. Then, the puncture needle 13 can be removed from the puncture site. Subsequently, the puncture needle 13 is separated from the connecting post 3, and the connecting post 3 returns to the inside of the outer shell 1. The external water supply device is activated to input water into the water inlet pipe 22. At this time, the heating device 2 can heat the input water flow. High-temperature water flow is input into the inside of the outer shell 1 through the guide shroud 21. The high-temperature water flow into the inside of the outer shell 1 can clean the connection point of the connecting post 3. The water flow flows out from the inside of the outer shell 1 through the guide wire hole 34, which can achieve high-temperature disinfection of the inside of the outer shell 1 and the inside of the connecting post 3. The heating device 2 is existing technology. Then, the connecting post 3 is reset to the inside of the guide shell 11. At this time, the puncture needle 13 in the filling box 12 automatically replenishes the channel inside the outer shell 1 to facilitate subsequent punctures.

[0040] like Figures 1 to 8 As shown, one end of the connecting column 3 is fixed with a connector 33, and one end of the puncture needle 13 is fixed with a fixing cover 131. The fixing cover 131 can be inserted into the connector 33, and the connector 33 also has a guide wire hole 34 inside.

[0041] The puncture needle 13 can be connected to the connecting post 3 by inserting the fixing cover 131 and the connector 33, and the fixing cover 131 and the connector 33 can be separated by moving them in the opposite direction, which facilitates the installation and separation of the fixing cover 131 and the connector 33.

[0042] like Figures 1 to 8 As shown, multiple third spring pieces 331 are fixed at equal intervals on the outer side of the connector 33, and two annular grooves 132 are opened inside the fixing cover 131, and the third spring pieces 331 can be snapped into the inside of the annular grooves 132.

[0043] When the connector 33 is inserted into the fixed cover 131, a third spring 331 is provided to make the connection more stable. After the connector 33 is inserted into the fixed cover 131, the third spring 331 is inserted into the annular groove 132. At this time, the connection between the fixed cover 131 and the connector 33 can be strengthened, thereby preventing the fixed cover 131 and the connector 33 from separating during use.

[0044] like Figures 1 to 8 As shown, a gap is provided between the end of the connector 33 and the end of the fixing cover 131, and a first metal spring 16 is fixed at the protrusion of the outer shell 1.

[0045] When the fixing cover 131 extends out of the housing 1, it pushes the first metal spring 16 to deform. When the end of the first metal spring 16 gets into the gap between the fixing cover 131 and the connector 33, it pulls the connecting column 3 to disengage the fixing cover 131 from the connector 33.

[0046] When the connecting post 3 extends into the interior of the outer shell 1, the connecting post 3 pushes the connector 33 to connect with the fixing cover 131. When the connecting post 3 extends to the deepest part of the outer shell 1, the outer shell 1 pushes the fixing cover 131 out of the outlet of the outer shell 1 through the connector 33. At this time, the fixing cover 131 will first push the first metal spring 16, and the first metal spring 16 will bend and deform upward. When the fixing cover 131 is fully extended, the first metal spring 16 will be reset downward under the action of elasticity. At this time, the end of the first metal spring 16 is stuck in the gap between the fixing cover 131 and the connector 33. After use, the connecting post 3 needs to be pulled back to reset. At this time, the connecting post 3 pulls the connector 33, and the connector 33 retracts into the interior of the outer shell 1. At this time, the fixing cover 131 will be separated from the connector 33 under the limiting action of the first metal spring 16. This can realize the automatic removal of the puncture needle 13 after use, reduce the contact of the staff with the puncture needle 13, and prevent the spread of bacteria, etc.

[0047] like Figures 1 to 5 As shown, a top plate 124 is fixed to the top of the top spring 123, and the top plate 124 can contact the fixed cover 131. A support frame 143 is provided inside the outer shell 1.

[0048] The fixing cover 131 can be locked inside the support frame 143;

[0049] When the puncture needle 13 is inserted into the filling box 12, the puncture needle 13 fills the filling box 12 and pushes the top plate 124 by the elastic force of the top spring 123. The top plate 124 pushes the fixing cover 131 to press them together. When the filling box 12 needs to output the puncture needle 13, the elastic force of the top spring 123 can push the puncture needle 13 to move into the inside of the outer shell 1. When the puncture needle 13 enters the inside of the outer shell 1, the support frame 143 can guide and support the fixing cover 131, thereby maintaining the current orientation of the puncture needle 13 inside the outer shell 1, so that the puncture needle 13 can extend out from the inside of the outer shell 1.

[0050] like Figures 1 to 5 As shown, a first storage slot 14 is provided on one side of the outer shell 1, and a support frame 143 is rotatably connected inside the first storage slot 14. A first coil spring 144 is fixed to the outside of the rotating shaft of the support frame 143, and the other end of the first coil spring 144 is fixedly connected to the outer shell 1.

[0051] When the connecting post 3 pushes the connector 33 into the fixed cover 131, the first coil spring 144 provides support force to the support frame 143. After the connector 33 is connected to the fixed cover 131, the connecting post 3 continues to push the connecting post 3 so that the support frame 143 rotates into the first storage groove 14.

[0052] The elastic force of the first coil spring 144 is greater than the elastic force of the multiple third spring pieces 331. When the connecting post 3 pushes the connector 33 into the fixed cover 131, the elastic force of the first coil spring 144 supports the support frame 143 to assist the fixed cover 131 in connecting with the connector 33. After the connection is completed, the connecting post 3 is pushed. At this time, the thrust of the connecting post 3 is greater than the elastic force of the support frame 143, which can make the support frame 143 rotate 90° into the first storage groove 14, so that the support frame 143 is stored inside the first storage groove 14. When the connecting post 3 is reset, the support frame 143 loses the thrust. The first coil spring 144 can drive the support frame 143 to automatically reset, so that the support frame 143 supports the fixed cover 131 and automatically separates from the fixed cover 131.

[0053] like Figure 3 As shown, a fixing plug 121 is inserted into one side of the material box 12. The top and bottom ends of the fixing plug 121 are provided with protrusions 122. The protrusions 122 are provided with matching slots inside. The protrusions 122 and the slots can be engaged and connected. The end of the top spring 123 away from the top plate 124 is fixedly connected to the fixing plug 121.

[0054] When inserting the puncture needle 13, the retaining plug 121 is pulled out from the inside of the filling box 12, and the puncture needle 13 is inserted into the inside of the filling box 12. Then the retaining plug 121 is inserted into the inside of the filling box 12. The top spring 123 and the top plate 124 will also press against the surface of the retaining cover 131 at the same time. The protrusion 122 engages with the slot inside the filling box 12 to limit the retaining plug 121, so as to facilitate the insertion of the puncture needle 13 into the inside of the filling box 12.

[0055] like Figures 1 to 6 As shown, a second metal spring 32 is fixed on one side of the connecting column 3, a second slide 142 is provided inside the guide shell 11, a sliding baffle 125 is slidably connected inside the second slide 142, and a fixing strip 127 is fixed in the middle of the sliding baffle 125 near the connecting column 3.

[0056] The sliding baffle 125 can seal the opening of the filling box 12;

[0057] In the initial position, connecting post 3 is placed inside guide shell 11, as shown in the reference. Figure 3 At the position of the connecting post 3, the sliding baffle 125 is also placed inside the guide shell 11, and the second metal spring 32 is located on the right side of the fixing strip 127. At this time, one of the puncture needles 13 is pushed into the interior of the shell 1.

[0058] Next, the connecting post 3 is pushed to move the second metal spring 32. The second metal spring 32 is elastic and can move the fixing strip 127. The fixing strip 127 moves the sliding baffle 125 to the position of the connection between the filling box 12 and the outer shell 1. When the connecting post 3 extends into the middle of the inner part of the outer shell 1, the second metal spring 32 moves the fixing strip 127 to the middle of the connection of the filling box 12. At this time, the sliding baffle 125 can block the connection of the filling box 12. During this process, the connector 33 and the fixing cover 131 are connected. The connecting post 3 will then push the puncture needle 13 out. At this time, the sliding baffle 125 is limited by the second slide 142 to fix the fixing strip 127. At this time, the second metal spring 32 is deformed by force and separates from the fixing strip 127, so that the connecting post 3 can push the puncture needle 13 out from the inner part of the outer shell 1.

[0059] Subsequently, after the puncture needle 13 is used, it is removed by the first metal spring 16. Then, the connecting post 3 needs to be retracted. At this point, when the connecting post 3 is pulled back so that the second metal spring 32 contacts the fixing strip 127, the movement of the connecting post 3 stops, placing the connector 33 inside the housing 1 near the flow guide 21. At this time, the connector 33 and the connecting post 3 can be cleaned using the heating device 2. After cleaning, the connecting post 3 is pulled back. The second metal spring 32 is now on the left side of the fixing strip 127, allowing it to push the fixing strip 127. 7. The sliding baffle 125 is slid into the guide shell 11. When the sliding baffle 125 is completely slid into the guide shell 11, the connection port of the filling box 12 is unblocked, and the puncture needle 13 inside the filling box 12 can fill the inside of the outer shell 1. When the sliding baffle 125 moves into the guide shell 11, it is limited again by the second slide 142, but the connecting column 3 can continue to move a distance. At this time, the second metal spring 32 can be deformed again, and the second metal spring 32 is reset to the right side of the fixing strip 127 by the driving of the connecting column 3.

[0060] It can automatically seal the filling box 12 when the heating device 2 is cleaning the connector 33, and can automatically fill the box after one use.

[0061] like Figures 1 to 6 As shown, a clamping head 126 is fixed to one end of the sliding baffle 125 near the support frame 143, and the two sides of the clamping head 126 can contact the outer side of the fixing cover 131.

[0062] When the puncture needle 13 inside the filling box 12 is pushed into the outer shell 1, two puncture needles 13 will enter the outer shell 1 at the same time. Before the sliding baffle 125 seals the filling box 12, the excess puncture needles 13 need to be retracted into the filling box 12. Therefore, a clamping head 126 is provided at the end of the sliding baffle 125. When the sliding baffle 125 moves, it will drive the clamping head 126. The special shape of the clamping head 126 will contact the fixed cover 131 placed outside the support frame 143. The clamping head 126 has a slope. Through the slope, the fixed cover 131 can be pressed into the filling box 12 during the pushing process, so that the excess puncture needles 13 return to the filling box 12.

[0063] like Figures 1 to 4 As shown, a second storage groove 15 is provided inside the outer casing 1 on the side near the protrusion. A sealing plate 151 is rotatably connected inside the second storage groove 15. A second coil spring 152 is fixed to the end of the rotating shaft of the sealing plate 151. The other end of the second coil spring 152 is fixedly connected to the outer casing 1.

[0064] When the heating device 2 inputs high-temperature water flow into the interior of the outer shell 1, a sealing plate 151 is set up for more efficient cleaning. When the connecting column 3 pushes the puncture needle 13 out, the sealing plate 151 is rotated upward under force and stored inside the second storage groove 15. After the connecting column 3 is used, the connector 33 moves below the guide shroud 21. At this time, the sealing plate 151 loses its thrust, and the second coil spring 152 drives the sealing plate 151 to reset, which can seal one end of the outer shell 1, thereby making it easier to clean the interior of the outer shell 1 more efficiently and reducing water overflow from the interior of the outer shell 1.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cardiovascular clinical puncture device, characterized in that: The device includes an outer shell, inside which a material box is fixed, and inside the material box are multiple puncture needles. A guide shell is fixed on one side of the outer shell, and a connecting post is slidably connected inside the guide shell. An outlet is opened on the side of the outer shell away from the guide shell. A top spring is installed inside the material box. A guide wire hole is opened inside the connecting post, and the inner diameter of the guide wire hole matches the inner diameter of the puncture needle. Sliding strips are fixed at the top and bottom of the connecting post. First slides are opened at the top and bottom of the guide shell, and the sliding strips can be slidably connected inside the first slides. A flow guide is fixed to the top of the outer shell, a heating device is installed on one side of the flow guide, and a water inlet pipe is fixed to the side of the heating device away from the flow guide, and the water inlet pipe is connected to an external water supply. When the connecting post is pushed from the guide shell into the interior of the outer shell, the connecting post will push the puncture needle out from the protrusion. A second metal spring is fixed on one side of the connecting column, and a second slide is provided inside the guide shell. A sliding baffle is slidably connected inside the second slide, and a fixing strip is fixed in the middle of the sliding baffle near the connecting column. Among them, the sliding baffle can seal the opening of the filling box; A second storage slot is provided inside the outer casing on the side near the protrusion. A sealing plate is rotatably connected inside the second storage slot. A second coil spring is fixed to the end of the rotating shaft of the sealing plate, and the other end of the second coil spring is fixedly connected to the outer casing.

2. The cardiovascular clinical puncture device according to claim 1, characterized in that: One end of the connecting column is fixed with a connector, and one end of the puncture needle is fixed with a fixing cover. The fixing cover can be inserted into the connector, and the connector also has a guide wire hole inside.

3. The cardiovascular clinical puncture device according to claim 2, characterized in that: Multiple third spring pieces are fixed at equal intervals on the outer side of the connector, and two annular grooves are opened inside the fixing cover, so that the third spring pieces can be engaged inside the annular grooves.

4. The cardiovascular clinical puncture device according to claim 3, characterized in that: A gap is provided between the end of the connector and the end of the fixed cover, and a first metal spring is fixed at the protrusion of the outer shell; Specifically, when the fixing cover extends from inside the outer shell, it pushes the first metal spring to deform. When the end of the first metal spring gets stuck in the gap between the fixing cover and the connector, it pulls the connecting column to disengage the fixing cover from the connector.

5. A cardiovascular clinical puncture device according to claim 1, characterized in that: The top of the top spring is fixed with a top plate, which can contact the fixed cover. The housing is equipped with a support frame. The fixing cover can be locked inside the support frame.

6. A cardiovascular clinical puncture device according to claim 5, characterized in that: A first storage slot is provided on one side of the outer shell, and a support frame is rotatably connected inside the first storage slot. A first coil spring is fixed to the outside of the rotating shaft of the support frame, and the other end of the first coil spring is fixedly connected to the outer shell. When the connecting column pushes the connector into the fixed cover, the first coil spring provides support to the support frame. After the connector is connected to the fixed cover, it continues to push the connecting column to make the support frame rotate into the first storage slot.

7. A cardiovascular clinical puncture device according to claim 5, characterized in that: A fixing plug is inserted on one side of the material box. The top and bottom of the fixing plug are provided with protrusions. The protrusions are provided with matching slots inside. The protrusions and slots can be engaged and connected. The end of the top material spring away from the top material plate is fixedly connected to the fixing plug.

8. A cardiovascular clinical puncture device according to claim 1, characterized in that: A clamping head is fixed at one end of the sliding baffle near the support frame, and the two sides of the clamping head can contact the outside of the fixed cover.

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