Nasal foreign body extractor

Abstract

The utility model provides a nasal foreign body extractor, and belongs to the technical field of medical instruments. Comprising an integration assembly, a visualization assembly is installed on the front portion of the outer end of the integration assembly in a threaded mode, a magnetic attraction assembly is installed on the right side of the outer end of the integration assembly in a threaded mode, and a negative pressure assembly is installed on the left side of the magnetic attraction assembly in a threaded mode; the integration assembly comprises an upper connecting rod and a middle connecting rod. The upper connecting rod, the middle connecting rod and the lower connecting rod are combined to form a structure capable of freely moving in three directions through the arranged integration plug pin, and the front ends of the upper connecting rod, the middle connecting rod and the lower connecting rod are installed together with the visualization assembly, the magnetic attraction assembly and the negative pressure assembly, so that three foreign matter taking-out structures are integrated; foreign matters are subsequently taken out through three modes of hooking, magnetic attraction and negative pressure adsorption, the applicability is higher, the operation is more convenient, and in addition, through the design of the visual assembly, compared with the traditional mode that the condition in the nasal cavity of a patient can be observed only through a nasal cavity mirror, the device can be more suitable for clinic.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a nasal foreign body remover. Background Art

[0002] Nasal foreign bodies refer to foreign substances in the nasal cavity. Among them, pediatric patients are more common. For example, when children are playing, they may put some marbles, buttons and other visible metal objects, round foods into the nasal cavity out of curiosity or other factors. The special structure of the nasal cavity makes it difficult to remove them later, thus causing nasal foreign bodies. At this time, it is necessary to go to the hospital to find a specialist to remove them. However, the existing nasal foreign body removers have a relatively simple structure.

[0003] For example, a nasal foreign body remover disclosed in the Chinese utility model patent application disclosure specification CN219661862U can make it easier for medical personnel to remove foreign bodies of different positions, sizes, and materials, thereby completely replacing other temporarily modified diagnostic and treatment tools, achieving reuse, and avoiding damage to the patient's nasal mucosa and bleeding, while ensuring the safety and hygiene of the instrument. Although it can be reused, in actual use, the overall structure of the foreign body remover is single, and its applicability to some special types of foreign bodies is not high. For example, when encountering metal or round foreign bodies, it is difficult to remove them, which requires the use of other instruments for replacement and use, which is not fast enough. In addition, in clinical use, a nasal endoscope is generally required to confirm the foreign body, and the entire process is relatively cumbersome. Therefore, the present application provides a nasal foreign body remover to meet the above needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a nasal foreign body remover to solve the problems that the existing nasal foreign body removers have a single structure, low applicability, inconvenient operation, and clinical use still requires a nasal endoscope, and the entire process is relatively cumbersome.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A nasal foreign body remover comprises an integrated component, a visualization component is installed on the front thread of the outer end of the integrated component, a magnetic suction component is installed on the right thread of the outer end of the integrated component, and a negative pressure component is installed on the left thread of the magnetic suction component;

[0007] The integrated assembly includes an upper connecting rod, a middle connecting rod, a lower connecting rod and an integrated latch. The middle connecting rod is sleeved and installed below the upper connecting rod, the lower connecting rod is sleeved and installed below the middle connecting rod, and the integrated latch is threadedly installed in the middle of the upper connecting rod, the middle connecting rod and the lower connecting rod.

[0008] Optionally, the visualization component includes a handle rod, a tail handle A, a twist cover A, an extension rod, a hook head, a slide groove, a push block, a power connection block and a battery pack. The rear end of the handle rod is threadedly installed with the tail handle A, the front end of the handle rod is threadedly installed with the twist cover A, the inner side of the front end of the handle rod is sleeved and installed with the extension rod, the front end of the extension rod is welded and installed with the hook head, a slide groove is opened in the middle of the upper end of the handle rod, the inner side of the slide groove is sleeved and installed with a push block, the inner side of the rear end of the handle rod is welded with the power connection block, and the inside of the tail handle A is embedded and installed with a battery pack.

[0009] Optionally, the magnetic suction assembly includes a tail handle B, a rotating sleeve rod, a threaded rod, a wrapping head, a magnetic suction block, a twist cover B and a connecting head. The front of the tail handle B is sleeved with a rotating sleeve rod, the internal thread of the rotating sleeve rod is installed with a threaded rod, the front end of the threaded rod is welded with a wrapping head, the inner side of the front end of the wrapping head is embedded with a magnetic suction block, the outer side of the front end of the threaded rod is threadedly installed with a twist cover B, and the inner side of the rear end of the rotating sleeve rod is clamped with a connecting head.

[0010] Optionally, the negative pressure component includes a hollow tube, a pull rod, a piston block, an airbag and a suction head. The rear end of the hollow tube is sleeved with the pull rod, the front end of the pull rod is threadedly mounted with the piston block, the front end of the piston block is provided with an airbag, and the front end of the hollow tube is threadedly mounted with the suction head.

[0011] Optionally, the upper connecting rod, the middle connecting rod and the lower connecting rod have the same length, the front ends of the upper connecting rod, the middle connecting rod and the lower connecting rod are provided with threaded joints, and the tail ends of the upper connecting rod, the middle connecting rod and the lower connecting rod are provided with annular sleeve blocks.

[0012] Optionally, a cavity is opened at the rear end of the handle rod, a circuit board and a Bluetooth transmitter are installed inside the cavity, a connecting line is welded on the rear side of the lower end of the handle rod, an opening and closing plate is installed on the right side of the outer end of the tail handle A, and the extension rod and the hook head are an integrated structure.

[0013] Optionally, a small camera is embedded in the rear end of the inner side of the hook head, and the small camera is electrically connected to the internal circuit board of the handle rod and the Bluetooth transmitter. Limiting grooves are provided on the right side of the front and rear ends of the slide slot, and the battery pack is composed of six button-block batteries.

[0014] Optionally, a protective sleeve is sleeved and installed on the outer side of the rotating sleeve rod, and the interior of the rotating sleeve rod is a hollow structure. The inner diameter of the hollow structure is provided with a thread groove, and the thread groove is adapted to the threaded rod.

[0015] Optionally, the threaded rod and the wrapping head are an integrated structure, and the connecting head, the tail handle B and the rotating sleeve rod are all clamped and installed.

[0016] Optionally, the piston block and the airbag are an integrated structure, both made of rubber material.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] In the above scheme, the upper connecting rod, the middle connecting rod and the lower connecting rod can be combined by setting an integrated pin to form an installation structure that can swing freely in three directions. In addition, due to the threaded joints at the front ends of the upper connecting rod, the middle connecting rod and the lower connecting rod, the visualization component, the magnetic suction component and the negative pressure component can be threaded together to integrate the three foreign body removal structures together. When in use, different removal structures can be freely switched according to the needs of the foreign body, which improves the applicability and convenience of the foreign body remover compared to the traditional single-structure foreign body remover.

[0019] Through the combined design of visualization components, magnetic suction components and negative pressure components, the three foreign body removal structures are integrated, and the foreign bodies are subsequently removed by hooking, magnetic suction and negative pressure adsorption. The applicability will be higher and the operation will be more convenient. In addition, through the design of visualization components, it can be more suitable for clinical use than the traditional method that requires nasal endoscopy to observe the situation in the patient's nasal cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0021] Figure 1 This is a schematic diagram of the planar structure of the nasal foreign body remover;

[0022] Figure 2 This is a schematic diagram of the planar structure of the integrated components of the nasal foreign body remover;

[0023] Figure 3 This is a schematic diagram of the three-dimensional separation structure of the visualization component of the nasal foreign body remover;

[0024] Figure 4 This is a schematic diagram of the three-dimensional separation structure of the magnetic suction component of the nasal foreign body remover;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the negative pressure component of the nasal foreign body remover;

[0026] Figure 6 For attachment Figure 1 Enlarged structural diagram at A in the middle.

[0027] [reference numerals]

[0028] 1. Integrated component; 2. Visual component; 3. Magnetic component; 4. Negative pressure component; 101. Upper connecting rod; 102. Middle connecting rod; 103. Lower connecting rod; 104. Integrated latch; 201. Handle rod; 202. Tail handle A; 203. Twist cover A; 204. Extension rod; 205. Hook head; 206. Slide groove; 207. Push block; 208. Power connection block; 209. Battery pack; 301. Tail handle B; 302. Rotating sleeve rod; 303. Threaded rod; 304. Wrapping head; 305. Magnetic block; 306. Twist cover B; 307. Connecting head; 401. Hollow tube; 402. Pull rod; 403. Piston block; 404. Airbag; 405. Suction head.

[0029] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0030] The following is a detailed description of a nasal foreign body remover provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0031] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0032] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0033] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0034] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0035] like Figure 1-Figure 6 As shown, an embodiment of the utility model provides a nasal foreign body remover, comprising an integrated component 1, wherein a visualization component 2 is installed on the front thread of the outer end of the integrated component 1, a magnetic suction component 3 is installed on the right thread of the outer end of the integrated component 1, and a negative pressure component 4 is installed on the left thread of the magnetic suction component 3; the integrated component 1 comprises an upper connecting rod 101, a middle connecting rod 102, a lower connecting rod 103 and an integrated latch 104, wherein the middle connecting rod 102 is installed on the lower side of the upper connecting rod 101, A lower connecting rod 103 is sleeved and installed below the middle connecting rod 102. The lengths of the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103 are all the same, and the front ends of the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103 are all provided with threaded joints. Secondly, the tail ends of the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103 are all provided with annular sleeve blocks, and the middle parts of the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103 are threadedly installed with integrated pins 104.

[0036] By setting the integrated latch 104, the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103 can be combined to form an installation structure that can swing freely in three directions. In addition, due to the threaded joints at the front ends of the upper connecting rod 101, the middle connecting rod 102 and the lower connecting rod 103, the visualization component 2, the magnetic suction component 3 and the negative pressure component 4 can be threadedly installed together to integrate the three foreign body removal structures together. When in use, different removal structures can be freely switched according to the needs of the foreign body. Compared with the traditional single-structure foreign body remover, the applicability and convenience of the foreign body remover are improved.

[0037] like Figure 1 and Figure 3As shown, the visualization component 2 includes a handle bar 201, a tail handle A202, a twist cover A203, an extension bar 204, a hook head 205, a slide groove 206, a push block 207, a power connection block 208 and a battery pack 209. A switch is provided on the rear side of the upper end of the handle bar 201, and a cavity is provided at the rear end inside the handle bar 201, and a circuit board and a Bluetooth transmitter are installed inside the cavity. In addition, a connecting line is welded on the rear side of the lower end of the handle bar 201, which can be connected to a mobile device, so as to facilitate the subsequent observation of foreign bodies in the nasal cavity through a small camera. The rear end of the handle bar 201 is threadedly installed with the tail handle A202, and the right side of the outer end of the tail handle A202 is sleeved with an opening and closing plate, which can be opened to replace the internal battery pack 209. The front end of the handle bar 201 is threadedly installed with a twist cover A203, which can close the front end to keep the front end removal structure clean and sanitary. The inner sleeve of the front end of the handle bar 201 An extension rod 204 is installed on the handle bar 201, and the contact end of the extension rod 204 and the push block 207 are fixed together to form an integrated structure. In addition, the interior of the extension rod 204 is a hollow structure, which is convenient for laying lines inside to connect the small camera with the circuit board inside the handle bar 201. A hook head 205 is welded and installed on the front end of the extension rod 204, and a small camera is embedded and installed on the rear end of the inner side of the hook head 205. The small camera is electrically connected to the circuit board inside the handle bar 201 and the Bluetooth transmitter. In addition, the extension rod 204 and the hook head 205 are in an integrated structure. A slide groove 206 is provided in the middle of the upper end of the handle bar 201, and limiting grooves are provided on the right sides of the front and rear ends of the slide groove 206. A push block 207 is sleeved and installed on the inner side of the slide groove 206. A power connection block 208 is welded on the inner side of the rear end of the handle bar 201, and a battery pack 209 is embedded and installed inside the tail handle A202. The battery pack 209 consists of six block batteries.

[0038] Through the provided push block 207, the operator pushes it to move forward along the slide groove 206. At the same time, the push block 207 will also push the extension rod 204 out from the inner side of the handle rod 201, allowing the hook head 205 at the front end to enter the patient's nasal cavity, turn on the switch, and observe the foreign matter in the nasal cavity through the small camera installed on the inner side of the hook head 205. Then, the angle of the hook head 205 is adjusted according to the situation to fix the foreign matter. The push block 207 is operated in the reverse direction to pull the extension rod 204 backwards, thereby hooking out the foreign matter in the patient's nasal cavity. Compared with the traditional method that requires a nasal endoscope to observe the situation in the patient's nasal cavity, it can be more suitable for clinical use and is more convenient to use.

[0039] like Figure 1 , Figure 4 and Figure 6As shown, the magnetic attraction component 3 includes a tail handle B301, a rotating sleeve rod 302, a threaded rod 303, a wrapping head 304, a magnetic attraction block 305, a twist cover B306 and a connecting head 307. The front of the tail handle B301 is sleeved with a rotating sleeve rod 302, and the outer side of the rotating sleeve rod 302 is sleeved with a protective sleeve to prevent slipping. In addition, the interior of the rotating sleeve rod 302 is a hollow structure, and a thread groove is provided on the inner diameter of the hollow structure. The thread groove is adapted to the threaded rod 303, and the internal thread of the rotating sleeve rod 302 is connected to the threaded rod 303. A threaded rod 303 is installed on the threaded rod 303, the outer side of the front end of the threaded rod 303 is a smooth structure, a wrapping head 304 is welded and installed on the front end of the threaded rod 303, the threaded rod 303 and the wrapping head 304 are an integrated structure, a magnetic block 305 is embedded and installed on the inner side of the front end of the wrapping head 304, a twist cover B306 is threadedly installed on the outer side of the front end of the threaded rod 303, a connecting head 307 is clamped and installed on the inner side of the rear end of the rotating sleeve rod 302, and the connecting head 307 is clamped and installed with the tail handle B301 and the rotating sleeve rod 302.

[0040] When the hook head 205 cannot be used to remove the foreign body, and the foreign body is a metal one, the rotating sleeve 302 is designed to rotate, so that the threaded rod 303 extends forward along the threaded groove opened inside it, and the magnetic block 305 is moved into the nasal cavity. After the magnetic foreign body is moved to the position of the metal foreign body, it is adsorbed, and then the rotating sleeve 302 is rotated in the opposite direction to move the threaded rod 303 backward to remove the magnetic block 305 and the foreign body.

[0041] like Figure 1 and Figure 5 As shown, the negative pressure component 4 includes a hollow tube 401, a pull rod 402, a piston block 403, an airbag 404 and a suction head 405. The pull rod 402 is sleeved on the rear end of the hollow tube 401, the piston block 403 is threadedly installed on the front end of the pull rod 402, and the airbag 404 is provided at the front end of the piston block 403. The piston block 403 and the airbag 404 form an integrated structure and are both made of rubber material. The suction head 405 is threadedly installed on the front end of the hollow tube 401.

[0042] When encountering a round foreign object, the suction head 405 is designed to allow its front end opening to fit the surface of the round foreign object, and then the pull rod 402 is used to pull the piston block 403 backward to move it backward in the hollow tube 401, driving the airbag 404 to expand, thereby generating negative pressure suction in front of the suction head 405 to suck the round foreign object and remove the foreign object in the nasal cavity.

[0043] The working principle provided by the utility model is that before the nasal foreign body remover starts working, the operator pushes the push block 207 to move it forward along the slide groove 206, and at the same time, the push block 207 will also push the extension rod 204 from the inner side of the handle rod 201, so that the hook head 205 at the front end enters the patient's nasal cavity, turn on the switch, and observe the foreign body in the nasal cavity through the small camera installed on the inner side of the hook head 205. Then, the angle of the hook head 205 is adjusted according to the situation to fix the foreign body, and the push block 207 is operated in the reverse direction to pull the extension rod 204 backwards, so as to hook out the foreign body in the patient's nasal cavity; and, when the hook head cannot be removed and a metal foreign body is determined, the design of the rotating sleeve rod 302 allows it to rotate, so that the threaded rod 303 extends forward along the threaded groove opened inside it, and the magnetic suction block 305 is displaced into the nasal cavity to move to the metal foreign body. After locating the foreign body, it is adsorbed, and then the rotating sleeve rod 302 is rotated in the opposite direction to move the threaded rod 303 backwards to take out the magnetic block 305 and the foreign body. Secondly, when encountering a round foreign body, the suction head 405 is designed to make its front end opening fit the surface of the round foreign body, and then the pull rod 402 is used to pull the piston block 403 backwards to move it backwards in the hollow tube 401, driving the airbag 404 to expand, thereby generating negative pressure suction in front of the suction head 405 to absorb the round foreign body, thereby taking out the foreign body in the nasal cavity. Compared with the traditional method of needing a nasal endoscope to observe the situation in the patient's nasal cavity, it can be more suitable for clinical use, and the three different removal methods of hooking, magnetic suction and negative pressure adsorption are used to remove foreign bodies, which will have higher applicability, more convenient operation, and less damage caused by less invasiveness.

[0044] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A nasal foreign body remover, characterized in that: It includes an integrated component, a visualization component is installed on the front thread of the outer end of the integrated component, a magnetic component is installed on the right thread of the outer end of the integrated component, and a negative pressure component is installed on the left thread of the magnetic component; The integrated assembly includes an upper connecting rod, a middle connecting rod, a lower connecting rod and an integrated latch. The middle connecting rod is sleeved and installed below the upper connecting rod, the lower connecting rod is sleeved and installed below the middle connecting rod, and the integrated latch is threadedly installed in the middle of the upper connecting rod, the middle connecting rod and the lower connecting rod.

2. The nasal foreign body remover according to claim 1, characterized in that: The visualization component includes a handle bar, a tail handle A, a twist cover A, an extension rod, a hook head, a slide groove, a push block, a power connection block and a battery pack. The rear end of the handle bar is threadedly installed with the tail handle A, the front end of the handle bar is threadedly installed with the twist cover A, the inner side of the front end of the handle bar is sleeved with the extension rod, the front end of the extension rod is welded with the hook head, a slide groove is opened in the middle of the upper end of the handle bar, the inner side of the slide groove is sleeved with a push block, the inner side of the rear end of the handle bar is welded with the power connection block, and the inside of the tail handle A is embedded with a battery pack.

3. The nasal foreign body remover according to claim 1, characterized in that: The magnetic suction assembly includes a tail handle B, a rotating sleeve rod, a threaded rod, a wrapping head, a magnetic suction block, a twist cover B and a connecting head. The rotating sleeve rod is sleeved and installed in front of the tail handle B, the threaded rod is installed on the internal thread of the rotating sleeve rod, the wrapping head is welded and installed on the front end of the threaded rod, the magnetic suction block is embedded and installed on the inner side of the front end of the wrapping head, the twist cover B is threadedly installed on the outer side of the front end of the threaded rod, and the connecting head is clamped and installed on the inner side of the rear end of the rotating sleeve rod.

4. The nasal foreign body remover according to claim 1, characterized in that: The negative pressure component includes a hollow tube, a pull rod, a piston block, an air bag and a suction head. The rear end of the hollow tube is sleeved with the pull rod, the front end of the pull rod is threadedly mounted with the piston block, the front end of the piston block is provided with an air bag, and the front end of the hollow tube is threadedly mounted with the suction head.

5. The nasal foreign body remover according to claim 1, characterized in that: The upper connecting rod, the middle connecting rod and the lower connecting rod are all of the same length, the front ends of the upper connecting rod, the middle connecting rod and the lower connecting rod are all provided with threaded joints, and the tail ends of the upper connecting rod, the middle connecting rod and the lower connecting rod are all provided with annular sleeve blocks.

6. The nasal foreign body extractor according to claim 2, characterized in that: A cavity is provided at the rear end of the handle rod, a circuit board and a Bluetooth transmitter are installed inside the cavity, a connecting line is welded on the rear side of the lower end of the handle rod, an opening and closing plate is sleeved on the right side of the outer end of the tail handle A, and the extension rod and the hook head are an integrated structure.

7. The nasal foreign body remover according to claim 2, characterized in that: A small camera is embedded in the rear end of the inner side of the hook head, and the small camera is electrically connected to the internal circuit board of the handle rod and the Bluetooth transmitter. Limiting grooves are provided on the right side of the front and rear ends of the slide slot, and the battery pack is composed of six block batteries.

8. The nasal foreign body remover according to claim 3, characterized in that: A protective sleeve is sleeved and installed on the outer side of the rotating sleeve rod. The interior of the rotating sleeve rod is a hollow structure. A thread groove is opened on the inner diameter of the hollow structure. The thread groove is adapted to the threaded rod.

9. The nasal foreign body extractor according to claim 3, characterized in that: The threaded rod and the wrapping head are an integrated structure, and the connecting head, the tail handle B and the rotating sleeve rod are all clamped and installed.

10. The nasal foreign body remover according to claim 4, characterized in that: The piston block and the air bag are in an integrated structure and are both made of rubber material.

Images