Height, depth and circumference adjustment mechanism of the cervical collar

Abstract

The present invention relates to a cervical collar, its components and its method of use which overcome the problems of conventional cervical collars.

Description

Technical Field

[0001] The field of the invention relates to cervical collars. Background Art

[0002] A cervical collar is typically used to maintain the spine in a neutral alignment. To maintain this neutral alignment, the user's chin must be supported in a specific position. Therefore, a conventional cervical collar typically has a chin piece that supports the wearer's chin and a collar body that rests on the trapezius muscles.

[0003] U.S. Patent No. 7,674,234, incorporated herein by reference, relates to a cervical collar having a chin piece, a hoop body, and a chin height adjustment mechanism including a first rack cooperating with a pinion gear, arranged so that a single adjustment of the adjustment mechanism raises both lateral sides of the chin piece relative to the hoop body. U.S. Patent No. 7,674,234 states:

[0004] The terms "rack" and "pinion" are used herein in a broader manner than in common usage, and include embodiments having teeth of any size or indeed no teeth at all. For example, in the latter case, the rack and pinion may each have rubber surfaces which together provide sufficient friction to couple the relative motion of the rack and pinion [sic]. Also, in common usage, it is common to refer to the rack portion of a rack and pinion as being flat. As used in this application, a rack need not be flat and in fact will be curved in most cases. The only essential characteristic of a rack and pinion as used herein is that the rack translates in space as the pinion rotates. When the discussion is restricted to racks and pinions with teeth,

[0005] Either state the teeth explicitly or refer to the pinion as a planetary gear.

[0006] Medical professionals who are responsible for fitting cervical collars to many patients of different sizes every day complain that traditional cervical collars with a single height adjustment mechanism are difficult and time-consuming to operate, causing finger pain after fitting many patients, which makes them impossible to fit patients comfortably.

[0007] Further, some conventional cervical collars have a pivot point and provide for cam rotation that retracts the chin portion into the coronal plane of the body, thereby limiting properly fitting cervical collars to a minority of users. Retraction of the chin portion into the coronal plane of the body typically occurs in conventional cervical collars that include a conventional pivot system between the chin portion and the body portion, which may be able to exceed an acute angle when fitted to the patient.

[0008] Conventional cervical collars typically include a rear component that may have hook-and-loop straps on either end that connect to a front component and are individually adjusted to accommodate various circumferences of the patient's neck. Patients who remove the collar (e.g., to bathe) are often unable to replicate the same proper fit as provided by a medical professional and often resort to trial and error by detaching and reattaching the straps in an attempt to evenly align the front and rear components. Consequently, users are unable to consistently replicate the medical professional's fit, resulting in poor results.

[0009] Additionally, conventional cervical collars typically do not allow for adjustment of the chin piece to account for the depth of the user's chin, resulting in the collar fitting few patients or not fitting the patient properly. Summary of the Invention

[0010] To overcome these and other shortcomings of conventional cervical collars, a cervical collar and components thereof are provided in which a single adjustment of a height adjustment mechanism bilaterally adjusts the height of the space between the upper and lower portions of a front cervical collar component to accommodate a variety of patient neck lengths. Typically, during fitting, a medical professional can comfortably make a single adjustment of the adjustment mechanism, thereby raising and positioning the upper and lower portions to accommodate a patient's specific neck length.

[0011] Using the height adjustment mechanism herein, the height of the space between the chin portion and the main body portion of the front cervical collar can be lengthened in a substantially vertical direction (that is, substantially parallel to the coronal plane and perpendicular to the transverse plane of the main body). Thus, the cervical collar with the front portion herein allows the chin portion to be substantially raised vertically, thereby increasing the range of fit for a wider range of users. When making height adjustments, the height adjustment mechanism herein allows the collar to maintain an acute angle between the chin portion and the main body portion, such as Figure 30B As shown. Compared with the traditional pivot system ( Figure 30A ) Compared to a conventional front cervical collar, the chin portion and the main body portion may exceed an acute angle when adjusting the height.

[0012] Additionally, to overcome these and other shortcomings of conventional cervical collars, a chin piece is provided that can be adjusted to accommodate the depth of a patient's neck.

[0013] Further, to overcome these and other shortcomings of conventional cervical collars, a cervical collar having a circumferential adjustment mechanism is provided that can be fitted by a medical professional and maintains its circumferential dimensions when re-fitted by a patient after removal. Various strap systems, circumferential sizing designs, and adjustment mechanisms, mating members, or cam surface assemblies disclosed herein can overcome the shortcomings of conventional circumferential adjustment mechanisms.

[0014] In some embodiments, regarding the height adjustment mechanism, a front component of the cervical collar can have a chin portion and a main body portion, including a height adjustment mechanism, wherein a single adjustment of the adjustment mechanism raises and lowers the chin portion relative to the lateral sides of the main body portion, wherein the adjustment mechanism raises and lowers the chin portion substantially vertically.

[0015] In some embodiments, the height adjustment mechanism does not include a rack engaged with a pinion; or a cable and / or pulley; wherein the chin portion is not pivotally coupled to the main body portion and is not supported solely on the ends of the chin portion and the main body portion, respectively; and wherein the chin portion cannot bend to adapt to the user's chin contour when in use.

[0016] Specifically, in some aspects, the height adjustment mechanism can include a four-bar adjustment mechanism. In some aspects, the four-bar adjustment mechanism can include a pair of crossbars located laterally on either side of the front member between the chin portion and the body portion. The four-bar adjustment mechanism can include a pair of lead screws located laterally on either side of the front member; wherein the lead screws are each rotatably coupled to a shuttle; wherein a first end of each of the shuttles is coupled to an actuator rod; wherein a second end of each actuator rod is coupled to a first end of a single first crossbar of each of the crossbars; wherein an end of each pair of lead screws can include a bevel gear that engages with a drive gear.

[0017] In some aspects, the chin portion may include a first lateral chin portion and a second lateral chin portion, each of which defines an elongated slot therein; wherein the body portion may include a first lateral body portion and a second lateral body portion, each of which defines an elongated slot therein; wherein the coupled second end of each actuator rod is configured to span the elongated slot in each of the first and second lateral body portions; wherein the first end of the single second cross-bar of each of the cross-bars is configured to span the elongated slot in each of the first and second lateral body portions; wherein the second end of the single second cross-bar of each of the cross-bars is rotatably coupled to each of the first and second lateral body portions in a stationary position; wherein the second end of the single first cross-bar of each of the cross-bars is rotatably coupled to each of the first and second lateral body portions in a fixed position.

[0018] In some aspects, the height adjustment mechanism can include a leadscrew cooperating with a leadscrew nut or a shuttle or a locking mechanism in addition to or separate from the four-bar adjustment mechanism.

[0019] In any of the embodiments herein, the front component of the cervical collar can include a one-piece cervical collar shell comprising a chin portion, a main body portion, and a deformed portion therebetween. The one-piece cervical collar shell can include an elongated slot therein. In some aspects, the chin portion and the main body portion have a deformed portion therebetween and form the one-piece cervical collar shell. The chin portion and the main body portion can include a spring mechanism therebetween that can be biased to open at an acute angle between the chin portion and the main body portion.

[0020] In some aspects, the chin portion, main body portion, spring mechanism, and latch mechanism are configured such that a single adjustment of the latch mechanism raises the lateral side of the chin portion relative to the main body portion. The spring mechanism between the chin portion and the main body portion can be biased to open to an acute angle between the chin portion and the main body portion and can be biased to close to a relatively less acute angle. In some aspects, the spring mechanism is a deformed portion of the integral cervical collar shell.

[0021] In some aspects, the body portion may include markings indicating the height of the chin portion.

[0022] In some aspects, the front member can include a pair of lateral chin portions movably coupled to a chin rest therebetween.

[0023] In some aspects, the front component can include a chin depth adjustment mechanism. The chin depth adjustment mechanism can provide substantially horizontal movement of the chin piece about a pair of lateral chin portions when oriented in the same position as under the chin of an upright user, that is, can provide movement in a substantially horizontal direction perpendicular to the coronal plane and parallel to the transverse plane of the body. The chin depth adjustment mechanism can include a substantially horizontal depth adjustment slot for receiving a coupler that slides horizontally within the substantially horizontal depth adjustment slot. The pair of lateral chin portions can each include a substantially horizontal depth adjustment slot that accepts a coupler, such as a rivet, located on each end of the chin rest. In some aspects, the chin rest pivots.

[0024] In some aspects, the cervical collar herein can include a circumferential adjustment mechanism. The rear component can include a strap having sizing markings and a back panel; wherein the strap has a first end and a second end; wherein the sizing marking can be located between the first end and the second end; wherein the strap has an alignment marking proximate the first end; wherein the strap can be removably coupled to the front component; and wherein the alignment of the alignment marking proximate the first end of the strap corresponds to the alignment marking on the body portion. The second end of the strap can be removably coupled to the back panel and can be coupled to itself. In some aspects, the alignment of an edge of the second end of the strap corresponds to one of the sizing markings when coupled to itself.

[0025] Other circumferential adjustment mechanisms are also contemplated, such as a cam surface assembly component. The cam surface assembly can be coupled to the strap; configured so that the strap can be adjusted to a length that fits the patient's neck when the collar is worn; and designed so that the cam surface assembly can be removed from the collar without disturbing the strap at the desired length.

[0026] In some aspects, the rear component can include a cam surface assembly that can be removably coupled thereto. In some aspects, the front component can include a cam surface assembly. In some aspects, the cam surface assembly can be coupled to a strap attached thereto. The cam surface assembly can be removed from the front component without disturbing the length of the strap. For example, a cervical collar can include a front component; a rear component including a back panel and a strap; and a cam surface assembly that can be coupled to the front component and the rear component; the cam surface assembly being configured so that the strap can be adjusted to a length appropriate for the patient's neck circumference and being configured so that the cam surface assembly can be removed from the cervical collar without disturbing the strap at the length.

[0027] In some aspects, a circumferential adjustment mechanism can include a rear component of a cervical collar having a back panel, the rear component including a rear fitting having a coupler near a first end and a strap near a second end; wherein the strap is connected to the back panel; is configured so that the strap can be adjusted to a length that fits the patient's neck circumference; and is configured so that the rear fitting can be removed from the cervical collar without interfering with the strap having the length. The rear component can also include a front fitting for receiving the rear fitting. In some aspects, the rear fitting can be removably coupled to the back panel. In some aspects, the strap can be permanently attached to the rear fitting.

[0028] In some aspects, the cervical collar or portion thereof does not include a rack and pinion.

[0029] The method includes: adjusting a height adjustment mechanism to accommodate the length of a user's neck; adjusting a circumferential adjustment mechanism to accommodate the circumference of a user's neck; adjusting a chin depth adjustment mechanism to accommodate the depth of a user's chin; wearing and / or re-wearing a cervical collar while repeatably maintaining a predetermined adjustment; and / or combinations thereof.

[0030] Other features and advantages will be apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a front perspective view of an embodiment of an adjustable front component of a cervical collar in a position prior to adjustment for increased height.

[0032] Figure 2is a front perspective view of an embodiment of an adjustable front component of a cervical collar in a position after adjustment to increase the height of the chin portion relative to the main body portion.

[0033] Figure 3 is a front perspective view of an embodiment of an adjustable front component of a cervical collar in a locked position before adjustment is made.

[0034] Figure 4 is a front perspective view of an embodiment of an adjustable front component of a cervical collar in a locked position after being adjusted to increase the height of the chin portion relative to the main body portion.

[0035] Figure 5 is a front perspective view of an embodiment of an adjustable front component of a cervical collar in an unlocked position.

[0036] Figure 6 is a side cross-sectional view of an embodiment of a latch mechanism in an open position.

[0037] Figure 7 is a rear cross-sectional view of an embodiment of an adjustment knob in an open position.

[0038] Figure 8 is a rear cross-sectional view of an embodiment of an adjustment knob in a closed position.

[0039] Figure 9 is a front perspective view of an embodiment of an adjustable front component of a cervical collar with the cervical collar in a closed position prior to adjustment using a slide actuator.

[0040] Figure 10 is a front perspective view of an embodiment of an adjustable front component of a cervical collar in an open position after adjustment using a sliding actuator.

[0041] Figure 11 is an enlarged cross-sectional view of an embodiment of an adjustable front component of a cervical collar using a lead screw nut that does not surround the lead screw.

[0042] Figure 12 is a bottom perspective view of features of an embodiment of a height adjustable cervical collar.

[0043] Figure 13 is a three-quarter perspective view of an embodiment of an adjustable front component of a cervical collar in a closed position prior to adjustment using a knob, bevel gear, and lead screw nut surrounding a lead screw.

[0044] Figure 14 is a three-quarter perspective view of an embodiment of an adjustable front component of a cervical collar in an open position after adjustment using a knob, bevel gear, and lead screw nut surrounding a lead screw.

[0045] Figure 15is an exploded view of an embodiment of a bevel gear mechanism and a locking mechanism.

[0046] Figure 16 is a cross-sectional view of an embodiment of a drive gear and a locking mechanism.

[0047] Figure 17A A three-quarter perspective view of an embodiment of an adjustable front component of a cervical collar with a chin adjustment feature is shown. Figure 17B An enlarged side view of an embodiment of an adjustable chin lock mechanism is shown.

[0048] Figure 18A and Figure 18B Together are side views showing an embodiment illustrating the pivoting of the chin rest.

[0049] Figure 19 is an exploded view of an embodiment of a chin adjustment feature.

[0050] Figure 20 is a view of the interior side of an embodiment of a male chin stud with a chin adjustment feature.

[0051] Figure 21 is a perspective view of an embodiment of a cervical collar with a cam surface assembly attached to the front component and engaging a strap of the rear component of the cervical collar.

[0052] Figure 22 is an exploded view of an embodiment of a cam surface assembly detached from the front and rear components of a cervical collar.

[0053] Figure 23A is a perspective view of an embodiment of an adjustable rear component of a cervical collar attached to a front component. Figure 23B It is a line drawing of an adjustable strip.

[0054] Figure 24A and Figure 24B An embodiment of an attachment mechanism for an adjustable rear component of a cervical collar is illustrated.

[0055] Figure 25 A perspective view of an embodiment of a strap alignment mechanism with a cervical collar in the foreground and a portion of the front component in the background.

[0056] Figure 26 An embodiment is shown with numbered size markings on the strips.

[0057] Figure 27 An embodiment is shown with size markings on the strips having dots.

[0058] Figure 28A is a perspective view of an embodiment of a rear component having straps. Figure 28B is a perspective view of an embodiment of a rear component with assembly straps and foam padding.

[0059] Figure 29 is a perspective view of an embodiment of a cervical collar having both front and rear components with foam padding coupled with circumferentially open straps.

[0060] Figure 30A The angle between a conventional chin portion and a body portion having a pivot point therebetween is demonstrated, for example using a height adjustment mechanism comprising a typical cam rotation which, when engaged, can retract the chin portion into the coronal plane of the body. Figure 30B Aspects of the height adjustment mechanisms illustrated herein are demonstrated, wherein the chin portion is elevated substantially parallel to the coronal plane and perpendicular to the transverse plane of the body when in use. DETAILED DESCRIPTION

[0061] The term "front" has its ordinary meaning and refers to a position that is in front of or in front of another position. The term "rear" also has its ordinary meaning and refers to a position that is behind or behind another position.

[0062] refer to Figures 1 to 5 、 Figures 9 and 10 and Figures 13 and 14 Embodiments herein provide an adjustable front component 100 of a cervical collar, including a height adjustment mechanism 200 that can simultaneously raise and lower either the lateral chin portions 135, 145 or the lateral body portions 184, 194 of the front component 100 using a single motion, for example, by adjusting a sliding actuator 210, adjusting a spring and locking mechanism, or turning a knob, depending on which portion remains in a fixed position. A single motion refers to the ability to simultaneously raise and / or lower the lateral chin portions 135, 145 and / or the lateral body portions 184, 194 of the front component 100 without separately adjusting the height of each lateral portion of the cervical collar. A single motion, as used herein, can refer to the chin portion being raised or lowered, assuming the body portion remains in a fixed position, as if the body portion remains adjacent to the user's body during fitting.

[0063] In addition to the sliding actuator, spring and locking mechanism or knob, the height adjustment mechanism 200 may also include, for example, a lead screw, a four-bar height adjustment mechanism, an additional rod, or a component that overcomes the shortcomings of conventional cervical collars having a pivot mechanism, a cable mechanism, or a rack and pinion mechanism, such as the cervical collars disclosed in U.S. Patent Nos. 7,674,234, 8,864,693, 8,740,830, 9,421,119, 8,449,485, 8,721,576, 9,943,433, 9,011,357, 9,132,027, 9,713,546, 9,913,746, 9,717,621 and U.S. Patent Publication Nos. 20160287424A1, US20180140455A1 and US20180078400A1.

[0064] In some embodiments, the first lateral body portion 184 and / or the second lateral body portion 194 may have a first height adjustment mark 186 and / or a second height adjustment mark (not shown), respectively ( FIG. 18 , Figure 25 ). One or both height adjustment markings 186 can be aligned with corresponding markings (not shown) on the first side-down chin portion 135 and / or the second side-down chin portion 145. The corresponding markings (not shown) can be markings (such as a polished lower edge) on the first side-down chin portion 135 and / or the second side-down chin portion 145 that correspond to the height adjustment markings 186. Thus, once the height of the chin portion 130 relative to the body portion 170 is prescribed by a medical professional based on the anatomy of the individual patient, the medical professional or the patient fitting the cervical collar to the patient can adjust the height to the prescribed height. As discussed in more detail below, the prescribed height can be locked in place to prevent the patient from potentially making inaccurate adjustments when donning and re-donning the cervical collar.

[0065] Instead of a separate chin portion 130 and body portion 170, it is also contemplated that Figures 1 to 5 The illustrated unitary housing 110 may include a chin portion 130, a main body portion 170, and deformable portions 160, 161 integral with the unitary housing 110 and proximate the portion of the unitary housing 110 where the chin portion 130 and the main body portion 170 meet. In some aspects, the chin portion 130 may include a pair of lateral chin portions 135, 145 with a chin portion 135, 145 therebetween for resting the user's chin. The main body portion 170 may have lateral body portions 184, 194 that meet at a central portion 175. In some aspects, the unitary housing does not include a height adjustment mechanism.

[0066] For example, Figures 1 to 2Screw assembly or Figures 3 to 8 The locking structure of FIG includes an integral housing 110, a mechanism housing 111 (eg, Figure 29 ) and an embodiment of a front component 100 of a cervical collar having a height adjustment mechanism 200.

[0067] In some aspects, when deformed as part of the front component, the first side-to-side chin portion 135 can overlap the first lateral body portion 184. At the same time, the second side-to-side chin portion 145 can overlap the second lateral body portion 194. The components of the adjustment mechanism that move the chin portion 130 as a whole relative to the body portion 170 can be found near this overlapping area, namely, the first upper overlapping portion (fuzzy boundary shown in dashed lines), the second upper overlapping portion 190, the first lower overlapping portion 185, and the second lower overlapping portion (not shown). The size of the overlapping area will vary and depend on the setting to which the adjustment mechanism is modulated. The overlapping portion can be partially shown by the dashed boundary from the lower first side-to-side chin portion 135 and the upper edge of the first lateral body portion 184, for example, as shown in FIG. Figures 1 to 5 shown.

[0068] The deformable portions 160, 161 provide a spring action so that when coupled to the height adjustment mechanism 200, a medical professional fitting the cervical collar can more easily move the chin portion 130 away from the main body portion 170. The deformable portions 160, 161 can be integral with the integral housing 110, although separate springs or different springs are also contemplated, such as torsion springs, leaf springs, compression springs, pneumatic springs, expansion springs, magnetic springs, or springs made of radiolucent materials. Although non-radiolucent materials such as metal springs are contemplated, they are not ideal when an X-ray, CAT scan, or PET scan is required because a spinal injury may prevent the cervical collar from being removed to perform the scan.

[0069] Additionally, a slowing element may be incorporated to slow the spring velocity of the deforming body when the knob is opened to provide a more controlled lift.

[0070] In some aspects, the deformed portions 160, 161 (e.g., Figures 1 to 5) has mechanical advantages over pivots when used in the context of a cervical collar. For example, the pivot connecting the two lateral arms can rotate and lacks tension to maintain the angle between the two parts. The cervical collar may need to provide an additional lifting mechanism to compensate for the lack of tension, which can be omitted in this embodiment. If the pivot point is tightened to provide more tension to maintain the angle, undesirable friction between the lateral arms when pivoting may interfere with the smooth operation of the cervical collar. The front component with deforming portions 160, 161 as described herein overcomes these disadvantages. Further, the deforming mechanism contains fewer individual components, thereby providing a more robust mechanism because it has fewer points of failure.

[0071] In addition to the height adjustment mechanisms described herein, the integrated housing 110 may be used with other adjustment mechanisms, such as a rack and pinion and / or a cable adjustment mechanism.

[0072] In one embodiment, the height adjustment mechanism may include a lead screw that can operate in conjunction with a lead screw nut. Other similar mechanisms are also contemplated. For example, a threadless mechanism may operate like a lead screw and nut, however, the operation may be based on an angled rod and bearing, wherein when operating in conjunction with the bearing using friction, the rod can be similarly rotated and moved linearly.

[0073] In some aspects, the lead screw nut can provide a larger contact area on the lead screw and have fewer parts compared to the contact area of ​​a conventional rack and pinion system. The larger contact area between the lead screw and the lead screw nut provides a greater mechanical advantage compared to conventional mechanisms such as rack and pinion mechanisms or cable systems. When coupled to the collar body, the lead screw mechanism allows for a large adjustment input that produces a small output for more precise fine-tuning to raise and lower the chin portion. Further, compared to a rack and pinion system, the lead screw mechanism allows for greater loads, so more weight can be applied to the chin portion, providing additional mechanical advantages. Therefore, compared to other cervical collars, these mechanical advantages allow medical professionals to avoid the problems associated with fitting a cervical collar for multiple patients. The lead screw mechanism can be used with any conventional collar body. Additional advantages are apparent when used with the one-piece housing provided herein.

[0074] refer to Figures 1 to 2 , an embodiment of the front component 100 of the cervical collar may include an integrated housing 110 , a mechanism housing 111 and a lead screw assembly (height adjustment mechanism 200 ).

[0075] In some aspects, near the overlap region (at Figures 1 to 2The first side chin portion 135 has a first chin elongated slot 136 for receiving the first screw nut 280. Similarly, the second side chin portion 145 has a second chin elongated slot 146 for receiving the second screw nut 290.

[0076] The first lead screw nut 280 has a first female end 281 positioned proximate the outside surface of the first lower overlapping portion 185 that mates with the first male thread 261 of the first lead screw 260. Spaced apart from the first female end 81 may be a first terminal end 282 that may be positioned proximate the outside surface of the first upper overlapping portion.

[0077] Likewise, the second lead screw nut 290 has a second female end (not shown) positioned adjacent to the outer side surface of the second lower overlapping portion (not shown) and mated with the second male thread 271 of the second lead screw 270, and a second terminal end 292 spaced apart from the second female end and positionable adjacent to the outer side surface of the second upper overlapping portion 190. Components herein on the second side may be obscured in the figures and generally correspond to the first side components.

[0078] The first lateral body portion 184 can be connected to the first screw rod 260 on the first lower overlapping portion 185 for cooperating with the first screw rod nut 280; and the second lateral body portion 194 can be connected to the second screw rod 270 on the second lower overlapping portion for cooperating with the second screw rod nut 290.

[0079] The first lateral body portion 184 has a first body elongated slot 187 on the first lower overlapping portion 185 for receiving the first lead screw nut 280 ; and the second lateral body portion 194 has a second body elongated slot 197 on the second lower overlapping portion for receiving the second lead screw nut 290 .

[0080] In some aspects, the lead screws 260, 270 can be attached to the main body portion 170 using bushings (not shown) on either end that comprise connectors that can attach the lead screws 260, 270 to the main body portion 170 while maintaining the functionality of the lead screws. The bushings can be separate components or can be integral with the lateral main body portions 184, 194.

[0081] In some aspects, for example, when used as part of a cervical collar, the chin elongated slots 136, 146 partially overlap with the main body elongated slots 187, 197, respectively, thereby defining a path along which the screw nut 280 travels when engaged with the screw rods 260, 270, respectively, which allow the chin portion 130 to be raised or lowered relative to the main body portion 170 to fit the neck length and anatomy of an individual patient when adjusted using the height adjustment mechanism 200.

[0082] In some aspects, the body portion 170 can be connected to the height adjustment mechanism 200 for simultaneously raising and lowering the first and second chin-down portions 135 and 145 .

[0083] In some aspects, height adjustment mechanism 200 can include an adjustment knob 210 in central portion 175 of body portion 170 that can engage drive shaft 220. Drive shaft 220 can terminate in a first flexible joint 221a and a second flexible joint 222a (such as a U-shaped joint). First flexible joint 221a is movably coupled to first proximal end 231 of first lateral drive shaft 230, while second flexible joint 222b is movably coupled to second proximal end 241 of second lateral drive shaft 240.

[0084] First distal end 232 of first lateral drive shaft 230 may be movably coupled to first coupling end 262 of first lead screw 260 .

[0085] Second distal end 242 of second lateral drive shaft 240 may be movably coupled to second coupling end 272 of second lead screw 270 .

[0086] In some aspects, the drive shaft portion 220 can include a first drive shaft support 223 and a second drive shaft support 224 on one or either side of the adjustment knob 210 .

[0087] The lead screw nuts 280, 290 can be non-linear (curved or straight) pieces, wherein the same surface area of ​​the nut (female end 281) engages different portions of the rotating lead screws 260, 270. In some aspects, when in use, rotating the adjustment knob 210 simultaneously drives both lateral drive shafts 230, 240, which in turn drive the respective lead screws 260, 270. The lead screws 260, 270 cooperate with the lead screw nuts 280, 290, which engage the elongated slots 136, 146, respectively, thereby causing the upper overlapping portion 190 to travel along the path of the elongated slots 136, 146, which allows the chin portion 130 to travel away from the main body portion 170 to increase the space therebetween, thereby adjusting the length of the cervical collar.

[0088] In some aspects, the deformable portions 160, 161 comprise an area connecting the chin portion 130 to the main body portion 170. This area can be long enough and thin enough to allow the rigid material to flex, thereby allowing the chin portion 130 and the main body portion 170 to move relative to each other. In some aspects, when no adjustment mechanism is present or when not otherwise coupled to each other, the one-piece housing in a rest position has the chin portion 130 and the main body portion 170 at a substantially acute angle. "Substantially acute angle" is used as a comparison to conventional pivot systems, which may be able to exceed an acute angle in a similar configuration when the chin piece and the hoop body are not otherwise coupled to each other except at the pivot point. In some aspects, a spring biases the chin portion 130 and the main body portion 170 away from each other to a maximum height setting.

[0089] In some aspects, such as according to the deformation portion 160, 161, the spring allows the chin portion 130 to move back and forth in space relative to the main body portion 170. The height adjustment mechanism 200 controls the force of the bias that keeps the chin portion 130 away from the main body portion 170. For example, the height adjustment mechanism 200, including, for example, screw rods 260, 270, guides the degree of elasticity and keeps the chin portion 130 and the main body portion 170 from bouncing further than necessary to provide an appropriate distance between the patient's chin and trapezius muscle. Although the screw rods 260, 270 can, for example, be used to shorten the distance between the chin portion 130 and the main body portion 170 while fitting the patient's chin and trapezius muscle, it is not typically used to shorten the distance unless fine-tuning is performed. The chin portion 130 and the main body portion 170 can be manually pushed together to close the gap to assist, for example, the screw rods 260, 270.

[0090] In one embodiment, the adjustable front portion of the cervical collar can include a locking mechanism that overcomes the shortcomings of conventional cervical collars described herein. For example, the locking mechanism has fewer components and a smaller contact area than conventional mechanisms such as rack and pinion or cable systems. When coupled to the collar body, the locking mechanism utilizes a spring mechanism that biases the chin portion and the body portion away from each other. Consequently, these mechanical advantages, compared to other cervical collars, allow medical professionals to avoid the problems associated with fitting a cervical collar for multiple patients. When used with the one-piece housing described herein, the accessory advantages are readily apparent.

[0091] Regarding the locking mechanism Figures 3 to 8 Many aspects of the one-piece housing 110 are similar to the lead screw assembly discussed above and the parts are numbered similarly, which will be discussed in more detail below.

[0092] In some aspects, the body portion 170 can be connected to a latching mechanism (height adjustment mechanism 200) for simultaneously raising the first and second side-down chin portions 135, 145. Simultaneously lowering the first and second side-down chin portions 135, 145 can be performed manually or by using a lowering mechanism.

[0093] In some aspects, Figures 3 to 8 , such as according to the deformable portions 160, 161, the spring allows the chin portion 130 to travel in space relative to the main body portion 170. The height adjustment mechanism 200 controls the force used to keep the chin portion 130 biased away from the main body portion 170. For example, the height adjustment mechanism 200, including a locking mechanism, guides the degree of elastic force and keeps the chin portion 130 and the main body portion 170 from being elasticated further than necessary to provide an appropriate distance between the patient's chin and trapezius muscles. Although the locking mechanism can be used to shorten the distance between the chin portion 130 and the main body portion 170 while conforming to the patient's chin and trapezius muscles, it is not typically used to shorten the distance unless fine-tuning the cervical collar. The chin portion 130 and the main body portion 170 can be manually pushed together to close the gap to assist in lowering the height.

[0094] In some aspects, the self-sizing locking mechanism utilizes the spring action of the deformable portions 160, 161 of the integral housing 110, such as described herein, and the height adjustment mechanism 200 may include an adjustment knob 210 that serves as a locking mechanism to adjust the height of the chin section. In some aspects, the adjustment knob 210 may be located in the central portion 175 of the main body 170. Once the adjustment knob 210 is released, the chin section 130 opens away from the main body 170 by releasing the elastic force of the deformable portions 160, 161, and the collar can be adjusted to the proper size for the user. The height position can be set and locked in place by returning the adjustment knob 210 to its original position. Once adjusted, the patient does not need to resize the collar after removing and re-applying it, which provides advantageous repeatability compared to conventional collars, which may not be properly sized by the patient after removal and re-applying. Additionally, the self-sizing height adjustment mechanism 200 includes fewer individual components than, for example, a rack and pinion or cable mechanism, which provide a more robust mechanism because the self-sizing height adjustment mechanism 200 has fewer points of failure.

[0095] In reference Figures 6 to 8When the locking mechanism is configured, the first lateral arm 310 has a first post 312 at a first proximal end 311 that mates with the adjustment knob 210, which has a first knob opening 301 and a second knob opening that engages with the first post 312 and the second knob opening that engages with the second post 322 on the second lateral arm 320. The first opening 301 and the second opening can be located at opposite ends so that turning the knob in one direction pushes or pulls the lateral arms 310, 320 in the same direction or simultaneously toward or away from each other to lock or release the height adjustment mechanism 200.

[0096] The first distal end 313 of the first lateral arm 310 may include a first angled protrusion 314 that can engage the first panel angled slot 331 on the first locking panel 330 and the first body angled slot (not shown) of the lateral body portion 184. The second lateral arm 320 ( Figures 3 to 5 The second distal end 323 (not shown) Figures 3 to 5 ) may include a second inclined protrusion 324 that engages a second panel inclined slot on a second locking panel (not shown) and a second body inclined slot (not shown) on the lateral body portion 194.

[0097] In some aspects, first and second knob openings 301 and (not shown) cooperate with posts 321 , 322 and are positioned so that turning adjustment knob 210 simultaneously unlocks tilt tabs 314 , 324 of lateral arms 310 , 320 from panel tilt slots 331 .

[0098] dotted line( Figure 6 ) shows the positions of the inclined protrusions 314, 324 that will move once the adjustment knob 210 is opened, for example by rotating it, such as 45° to 90°. Figure 7 The embodiment of the adjustment knob 210 is shown in an open position. Figure 8 The embodiment of the adjustment knob 210 is shown in a closed position.

[0099] In some aspects, the first locking panel 330 can include a first panel spring mechanism 333, such as a compression spring, a leaf spring, or a deformable body, that biases the first locking panel 330 into a locked position, whereby the first row of teeth 332 of the first locking panel 330 engages the first opposing teeth 335 on the first latch 334. When the inclined protrusion 314 is unlocked, the first row of teeth 332 becomes disengaged from the first opposing teeth 335 of the first latch 334.

[0100] The first latch 334 is moved by a spring force such as the first deformable body 160 when unlocked and engages the first locking panel 330 when latched. The first latch 334 can be coupled to a first latch coupler 336, such as a toe nail or flange / screw, which can be positioned through and straddle a path defined by both the first chin elongated slot 136 and the first body elongated slot 187.

[0101] In some aspects, the first locking panel 330 can include a first panel spring mechanism 333, such as at least one compression spring, leaf spring, or deformable body, that biases the first locking panel 330 into a locked position, whereby the first row of teeth 332 of the first locking panel 330 engages the first opposing teeth 335 on the first latch 334. When the first inclined protrusion 314 can be unlocked, the first row of teeth 332 becomes disengaged from the first opposing teeth 335 of the first latch 334.

[0102] Likewise, on the second side, the second latch is moved by the spring force of the second deformable body 161 when unlocked and engages the second locking panel when in the locked position. The second latch can be coupled to a second latch coupler 346, such as a toe nail or a flange and screw, which can be positioned across and straddled along a path defined by both the second chin elongated slot 146 and the second body elongated slot 197.

[0103] Thus, a path can be defined along which the latch 334 travels, which allows the chin portion 130 to be raised or lowered relative to the main body portion 170.

[0104] Further, in some aspects, the second locking panel (not shown) can include a second panel spring mechanism (not shown), such as at least one compression spring, leaf spring, or deformable body, that biases the second locking panel (not shown) into a locked position, whereby a second row of teeth (not shown) of the second locking panel (not shown) engages a second opposing tooth (not shown) on the second latch (not shown). When the second inclined protrusion 324 can be unlocked, the second row of teeth becomes disengaged from the second opposing tooth of the second latch.

[0105] In some aspects, the panel spring mechanism 333 can include a pair of compression springs 333a, 333b located at either end of the locking panel 330. The panel spring mechanism 333 can be in a resting state when the tooth row 332 and the opposing tooth 335 are engaged. When the inclined protrusions 314, 324 are unlocked, the springs are compressed.

[0106] In some aspects, the locking panel 330 can be coupled to the lateral body portions 184, 194, such as by respective pairs of first and second tacks 338a, 338b (not shown), which are secured to the lateral body portions 184, 194. The locking panel 330 can have corresponding pairs of first and second panel tack slots 339a, 339b, 349a, 349b for receiving the tacks 338a, 338b so that they can slidably engage and move along the panel tack slots 339a, 339b, 349a, 349b. Further, the pair of compression springs 333a, 333b can also be positioned within or adjacent to the panel tack slots 339a, 339b, 349a, 349b.

[0107] In some aspects, the locking panels 330 have panel tilt slots 331 (not shown) extending along their lengths that are substantially aligned with body tilt slots (not shown) on the lateral body portions 184, 194, respectively, below the panel tilt slots 331. The panel tilt slots 331 and the body tilt slots have similar lengths for receiving the tilt tabs 314, 324 and can be longer than the tilt tabs 314, 324. However, the panel tilt slots 331 can be wider than the body tilt slots.

[0108] In some aspects, the body elongated slots 187, 197, the panel tilted slot 331, and the body tilted slot can be positioned at any suitable angle that allows the front components to function properly relative to a horizontal midplane (such as an approximately 45° angle), which extends substantially from the center of the opening between the chin portion 130 and the body portion 170 toward the center of the deformable portions 160, 161. The exact location and angle of the midplane are not defined as critical elements, but may be helpful in discussing the relationship between the moving components. The movement of the latch 334 in the body elongated slots 187, 197 and the movement of the tilted protrusions 314, 324 in the panel tilted slot 331 and the body tilted slot can be referred to as moving in parallel directions. However, in some aspects, when unlocked, the teeth row 332, 242 of the locking panel 330 can move away from the opposing teeth 335, thereby moving perpendicular to the parallel direction.

[0109] Specifically, the panel tilt slot 331 can be longer and wider than the tilt protrusions 314, 324 and allow the locking panel 330 to move vertically relative to the parallel direction (from side to side across the width of the panel tilt slot 331). Disengagement of the tilt protrusions 314, 324 from the panel tilt slot 331 can apply force to the locking panel 330 in a direction perpendicular to the parallel direction, which disengages the tooth row 332 from the opposing teeth 335 of the latch 334.

[0110] The lateral arms 310, 320 may cooperate with one or more guides 350, 351 (351 not shown) to help hold the lateral arms 310, 320 (320 not shown) in place. Additionally, a housing (not shown) for the lateral arms 310, 320 may serve as a guide, allowing the tilt tabs 314, 324 to ride in the panel tilt slots 331 (not shown). The housing ( Figures 6 to 8 The housing (not shown) may also include an opening (not shown) for holding the adjustment knob 210 in place and an additional accessory or knob (not shown) for operating the adjustment knob 210 from outside the housing.

[0111] Another embodiment of the height adjustment mechanism provides a four-bar adjustment mechanism. In some aspects, adjustment of the four-bar adjustment mechanism provides substantially parallel movement and substantially vertical lift, which better conforms to the anatomy of the neck compared to traditional cervical collars that incorporate a pivoting mechanism to raise the chin piece (see FIG30 ). For example, patients with thicker trapezius muscles, a shorter distance from shoulder to ear, and / or larger necks (e.g., in the case of obese patients) benefit from at least substantially vertical adjustment that provides firmer mandibular support while preventing the chin from moving upward at an angle while the neck bends backward.

[0112] refer to Figures 9 to 16 An embodiment of the front component 100 of the neck brace may include a chin portion 130 and a main body portion 170 and a four-bar adjustment mechanism 200. The chin portion 130 may further include a first side-down chin member 135 having a first elongated chin slot 136 for receiving a first chin sliding stud 418, a second side-down chin portion 145 having a second elongated chin slot 146 for receiving a first chin sliding stud 428, and a chin rest 150 for resting the user's chin.

[0113] The chin portion 130 and the body portion 170 can be coupled to a pair of rails 410a, 410b, 420a, and 420b. The center portion of the first rail 410a, 410b is movably connected to a first center coupler 417, and the center portion of the second rail 420a, 420b is movably connected to a second center coupler 427.

[0114] In some aspects, reference Figures 11 to 15The four-bar adjustment mechanism 200 may further include actuator rods 430, 440, each of which has one end connected to one of the cross bars 410a, 420a and the other end connected to a first shuttle 455 and a second shuttle 465 that cooperate with the first screw rod 454 and the second screw rod 464. The shuttles 455, 465 may engage at least a portion of the male threads 458, 468 and may be partially ( Figure 11 ) or completely surrounded by ( Figures 13 and 14 ) leadscrews 454, 464. The length of the shuttle may be shorter or longer and / or may engage or encompass more or fewer threads than depicted. The terms leadscrew nut and leadscrew shuttle are used interchangeably.

[0115] In some aspects, the first lead screw 454 is mounted in a first bracket 456 that allows the first lead screw 454 to rotate into position. Similarly, the second lead screw 464 is mounted in a second bracket 466 that allows the second lead screw 464 to rotate into position. Each of the brackets 456, 466 can include one, two, or more curved portions for receiving the ends of each lead screw 454, 464. The brackets 456, 466 can be separate pieces or integral with the main body 170.

[0116] In some aspects, one end of the first screw 454 can terminate at a first bevel gear 459, and one end of the second screw 464 can terminate at a second bevel gear 469, and the first bevel gear 459 and the second bevel gear 469 are engaged with a drive gear 470. The end of each screw in the screws 454 and 464 can include a first bevel gear 459 and a second bevel gear 469, and the first bevel gear 459 and the second bevel gear 469 are each engaged with a drive gear 470. The relevant aspects of the screw assembly discussed herein also apply here, for example, relating to the benefits of using a screw. Rotating the drive gear 470 (for example, using a drive knob 476) rotates each bevel gear in the first bevel gear 459 and the second bevel gear 469 attached to each screw in the screws 454 and 464. Screws 454, 464 each engage a shuttle 455, 465 which travels along a shuttle slot 457, 467 (shielded behind the screws, e.g., Figure 12 ), and move the actuator rods 430, 440. (In some aspects, reference Figures 9 and 10 , the front member may include the sliding actuator 210 and the actuator rods 430, 440. Aspects of these parts of the front member 100 are described in more detail below.)

[0117] The first actuator rod 430 can be movably connected to the crossbar 410a at the first body sliding end 414 by a first body sliding toe nail 416 that straddles the first body elongated slot 187. The second actuator rod 440 can be movably connected to the crossbar 420a at the second body sliding end 424 by a second body sliding toe nail 426 that straddles the second body elongated slot 197.

[0118] refer to Figures 9 to 16 On a first side, the crossbar 410a can be attached at the first chin pivot end 412 by a first chin pivot stud 413. In some aspects, the first chin pivot stud 413 can be rotatably movable but can otherwise be in a stationary position near the first distal end of the first lateral chin portion 135. The crossbar 410b can be movably connected at the first chin slide end 411 by a first chin slide stud 418 that straddles the first chin elongated slot 136. The crossbar 410b can be movably connected at the first body pivot end 415 by a first body pivot stud 419. In some aspects, the first body pivot stud 419 can be rotatably movable but can otherwise be in a stationary position and can mate with an opening near the first distal end of the first lateral body portion 184.

[0119] Similarly, on the other second side, crossbar 420a can be attached at the second chin pivot end 422 by a second chin pivot stud 423. In some aspects, the second chin pivot stud 423 can be rotatably movable but can otherwise be in a stationary position near the second distal end of the second lateral chin portion 145. Crossbar 420b can be movably connected at the second chin slide end 421 by a second chin slide stud 428 that straddles the second chin elongated slot 146. Crossbar 420b can be movably connected at the second body pivot end 425 by a second body pivot stud 429. In some aspects, the second body pivot stud 429 can be rotatably movable but can otherwise be in a stationary position and can mate with an opening near the first distal end of the second lateral body portion 194.

[0120] In some aspects, to operate the hoop, the drive knob 476 is rotated, which rotates the drive gear 470, which in turn rotates each of the lead screws 454, 464 attached to the shuttles 455, 465 and the actuator rods 410, 440, which in turn engage with the cross bars 410a, 410b, 420a and 420b to raise or lower the chin portion.

[0121] refer to Figures 9 and 10In some aspects, the sliding actuator 210 can include a slide plate 450 and an internal knob 470. The slide plate 450 can include lateral slots on either side, a first plate slot 451, and a second plate slot 461, for receiving first and second plate sliding studs 452, 462, which are attached to the proximal ends of the first and second actuator rods 430, 440 and respectively straddle first and second actuator elongated slots 453, 463, on the body portion 170. The slide plate 450 can also include a central rod (not shown) that straddles a vertical slot 474 in the central portion 175 of the body portion 170. Opposite the central rod on the slide plate 450 can be a cam groove 471 for receiving a cam follower 472 for adjusting the height of the chin portion 130.

[0122] The cam follower 472 can engage with the slide plate 450 and move in a vertical direction, which can be manipulated by an external adapter or knob 476.

[0123] In some aspects, when in use, the collar can be positioned by a medical professional who operates the slide actuator 210 (or the drive knob 476), which causes the first and second actuator rods 430 and 440 to simultaneously move the crossbars 410a and 420a, which are connected by body sliding studs 416 and 426 that straddle the first and second body elongated slots 187 and 197 on the body portion and are centrally connected to crossbars 410b and 420b, respectively, thereby engaging crossbars 410b and 420b. Crossbars 410b and 420b, in turn, have chin sliding studs 418 and 428 attached to one of their ends that straddle their respective first and second chin elongated slots 136 and 137 on the chin portion 130. The slot allows simultaneous vertical movement between the chin portion 130 and the main body portion 170 when the sliding actuator 210 (or drive knob 476) can be operated, that is, slid (or rotated) in one direction or slid (or rotated) in the opposite direction to raise or lower the chin portion relative to the main body portion 170 to fit the neck length and anatomy of an individual patient when adjusted using the height adjustment mechanism 200.

[0124] The chin portion 130 and body portion 170 herein may comprise a substantially rigid material that may provide a support framework for the chin portion 130 and body portion 170. The crossbar and actuator rod may be made of a material that is sufficiently rigid and strong to withstand the push and pull of the sliding actuator.

[0125] refer to Figures 13 to 16, in some aspects, the collar can include a locking mechanism. The locking mechanism can include a locking button 480 that can be used to release the gear drive to set the collar height. In some aspects, the locking button 480 can include leaf springs 481a and 481b and locking button teeth 482. The locking button teeth 482 on the locking button 480 engage with internal gear teeth 475 that can be found in the inner diameter of the drive gear 470. In some aspects, the leaf springs 481a and 481b on the locking button 480 maintain the locking button teeth 482 in a position engaged with the drive gear inner diameter gear teeth 475, as Figure 16 Pushing the locking button 480 downward disengages the locking button teeth 482 and allows the drive gear 470 to rotate, which in turn raises or lowers the height of the space between the chin portion 130 and the main body portion 170.

[0126] Furthermore, in some aspects, the locking mechanism can also include a locking switch 484, which is useful for the practitioner to lock the height in a preferred position, thereby preventing the user from easily adjusting the height after the practitioner is fitted. The locking switch 484 can include a switch flange 485 that is slidably coupled to a lock button flange 483 through a switch opening 478 in the housing 111. After fitting, the practitioner can move the locking switch 484, such as toward the center, so that the switch flange 485 engages with the lock button flange 483 of the lock button 480. Engaging the lock button flange 483 prevents the lock button 480 from moving, thereby locking the height of the space between the chin portion 130 and the main body portion 170. In some embodiments, the switch flange 485 of the locking switch 484 disengages from the lock button flange 483 to allow the practitioner or user to adjust the height of the space between the chin portion 130 and the main body portion 170.

[0127] In some aspects, the front member can include a chin portion 130, which can include a first lateral chin portion 135, a second lateral chin portion 145, and a chin rest 150 therebetween for resting the user's chin. The chin rest 150 can be integral with the remainder of the chin portion 130, or can include one or more separate components.

[0128] Regarding the front component including, for example, a four-bar adjustment mechanism, the chin portion 130 may include a first chin member 135 having a first elongated chin slot 136 for receiving a first chin sliding stud 418; a second chin member 145 having a second elongated chin slot 146 for receiving a second chin sliding stud 428; and a chin rest 150 for resting the user's chin. In some aspects, the chin portion 130 may include a chin depth adjustment mechanism.

[0129] Refer to Figures 17 to Figure 19 In some aspects, the chin portion 130 may include a separate chin rest 150 that can be adjusted to change the depth of the chin rest (by Figure 17A ) to accommodate the anatomies of various users. In some aspects, the separate chin rest 150 can have a first chin rest opening 437 that can be aligned with the first depth adjustment slot 431 in the first lateral chin portion 135 to receive a first male chin stud 433 that mates with the first female chin stud 438. A first rotation stop 439, which can be separate from or integral with the chin rest 150, can be positioned proximate to the first chin rest opening 437. The first female chin stud 438 and the first rotation stop 439 straddle the first depth adjustment slot 431 with the first male chin stud 433 in the mating position. The first rotation stop 439 can prevent the female chin stud 438 from fully rotating and can have an outer diameter that can be less than the height of the first depth adjustment slot 431, thereby allowing the chin rest 150 to pivot slightly, approximately 10 to 20 degrees, without fully rotating, to accommodate the chin anatomy of different users, such as Figure 18A and Figure 18B The size of the first female chin toe nail 438 can be designed to fit slightly tightly in the first depth adjustment slot 431 so that most of the weight is carried by the cylindrical portion of the first female chin toe nail 438b when in use.

[0130] In some aspects, the separate chin rest 150 can be locked in place after being adjusted to fit the user. For example, a first male chin stud 433 that can mate with a first female chin stud 438 can be positioned within the first chin rest opening 437 and rotated to lock the adjusted setting in place. The first male chin stud 433 can include a first male chin stud indicator 487, such as an arrow that allows the user to orient the first male chin stud 433 in a locked position (such as an arrow pointing up and down) or an arrow in an unlocked position (such as an arrow pointing left and right), or vice versa. In some aspects, the first depth adjustment slot 431 has a thinned area 486 proximate to a first engagement surface 432 that engages with a first set of locking surfaces 434a, 434b on the first male chin stud 433. The first male chin stud 433 may also include first male chin stud notches 488a, 488b that, if desired, can be aligned with one of the first chin depth dimension markings 436 when unlocked. Once the desired depth adjustment is made, the first male chin stud indicator 487 may be moved to a locked position (such as an up-and-down arrow). These components may be collectively referred to as a first chin support locking mechanism.

[0131] Likewise, the separate chin rest 150 can have a second chin rest opening 447 that can be aligned with the second depth adjustment slot 441 in the second lateral chin portion 145 to receive a second male chin pecking pin 443 that mates with a second female chin pecking pin 448. A second rotation stop 449, which can be separate from or integral with the chin rest 150, can be positioned proximate the second chin rest opening 447. The second female chin pecking pin 448 and the second rotation stop 449 straddle the second depth adjustment slot 441 while the second male chin pecking pin 443 is in the mated position. The second rotation stop 449 can prevent the female chin pecking pin 448 from fully rotating and can have an outer diameter that can be less than the height of the second depth adjustment slot 441, thereby allowing the chin rest 150 to pivot slightly, approximately 10 to 20 degrees, without fully rotating, to accommodate different users' chin anatomy, such as Figure 18A and Figure 18B The size of the second female chin toe cap nail 448 can be designed to fit slightly tightly in the second depth adjustment slot 441 so that most of the weight is carried by the cylindrical portion of the second female chin toe cap nail 448b when in use.

[0132] Likewise, as discussed above with respect to the first side, in some aspects, the separate chin rest 150 can be locked in place after being adjusted to fit the user. For example, a second male chin stud 443, which can mate with a second female chin stud 448, can be positioned within the second chin rest opening 447 and rotated to lock the adjusted setting in place. The second male chin stud 443 can include a second male chin stud indicator 497, such as an arrow that allows a user to orient the second male chin stud 443 in a locked position (such as an arrow pointing up and down) or an arrow in an unlocked position (such as an arrow pointing left and right), or vice versa. In some aspects, the second depth adjustment slot 441 has a thinned area 496 proximate to the second engagement surface 442, which engages with a second set of locking surfaces 444a, 444b on the second male chin stud 443. The second male chin stud 443 may also include second male chin stud notches 498a, 498b that, if desired, can be aligned with one of the first chin depth dimension markings 446 when unlocked. Once the desired depth adjustment is made, the second male chin stud indicator 497 may be moved to a locked position (such as an up-and-down arrow). These components may be collectively referred to as a second chin rest locking mechanism.

[0133] The toe nails referred to herein may generally include a male portion and a female portion, or may include an integral connection mechanism. Other couplers suitable for replacing the toe nails are contemplated, such as including screws, nuts, bolts, pins, flanges, buttons, or buckles; as well as traditional locking mechanisms that can secure the chin rest in place.

[0134] The main body portion 170 may include: a first lateral main body portion 184 having a first main body elongated narrow slot 187 for receiving the first main body sliding head nail 416; and a second lateral main body portion 194 having a second main body elongated narrow slot 197 for receiving the second main body sliding head nail 426.

[0135] Rear components are known in the art, for example, in U.S. Patent Nos. 9,414,956, 8,932,243, 6,494,854, 6,872,188, 9,713,546, 8,858,481, 9,668,906, 7,981,068, and 8,679,044. Conventionally, a front component and a rear component can be coupled together to form a cervical collar, such as by a slot at the rear portion of the front component through which a hook-and-loop strap can be attached. The rear component and the front component can comprise a substantially rigid material.

[0136] refer to Figures 21 to 27 , embodiments of a cervical collar include a front component 100 coupled to a rear component 500 using various straps and attachment mechanisms. In some aspects, the attachment mechanism allows a medical professional to adjust the circumference of the cervical collar to fit a user having a specific neck circumference, while allowing the cervical collar to be removed by a patient, for example, in a home setting, and then re-donned while maintaining the same circumferential configuration after the collar is re-donned without having to readjust the circumference.

[0137] In one embodiment, some portion of the first attachment mechanism 501 (eg, FIG. 24 ) may be found on the front component 100 and some portion may be found on the rear component 500 .

[0138] About Figures 23 to Figure 24B In some aspects of the present invention, portions of the first attachment mechanism 501 can be found on the front component 100. The front component 100 can include a first front mating piece 510 for mating with a first rear mating piece 520 on the rear component 500. The first front mating piece 510 can include an optional first front housing 511 and a first front coupler 512 disposed therein, such as a hook and loop coupler, a pressure sensitive adhesive (PSA), interlocking components (such as buckles or mating shapes), a tether / cable that ties or loops around a post, or (if the material need not be radiolucent) a magnet.

[0139] Likewise, in some aspects, the front component 100 can further include a second front mating piece (not shown) for mating with a second rear mating piece (not shown) on the rear component 500. The second front mating piece (not shown) can include an optional second front housing (not shown) and a second front coupler (not shown) disposed therein, such as a hook and loop coupler, a pressure sensitive adhesive (PSA), interlocking components (such as buckles or mating shapes), a tether / cable that ties or loops around a post, or (if the material need not be radiolucent) a magnet.

[0140] These couplers may be used with other straps or attachment mechanisms herein.

[0141] In some aspects, the first front mating piece 510 is configured to facilitate alignment and coupling with the first rear mating piece 520 on the rear component 500. Similarly, the second front mating piece (not shown) is configured to facilitate alignment and coupling with the second rear mating piece (not shown) on the rear component 500.

[0142] Thus, for example, the rear mating piece may include a hook material while the front mating piece may include a loop material, or vice versa.Other couplers, such as snaps, buckles, and other complementary couplers, are contemplated as also being usable with other embodiments herein.

[0143] The optional front housing 511, if present, can be molded into the front component 100 and can be integral with the front component 100 or attached using conventional attachment means such as tacks or adhesives. In some embodiments, when in use, the first front fitting 510 and the second front fitting 520 are attached to each lateral side of the front component adjacent the lateral sides of the rear component.

[0144] In some aspects, the first rear mating piece 520 on the rear component 500 can include a first rear coupler 522, such as a hook and loop coupler, configured to be received by the first front mating piece 510 and can include an optional first rear housing (not shown). The first rear mating piece 520 can also include a first slot 523 for receiving a first fastening hook and loop strip 524.

[0145] Likewise, in some aspects, the second rear mating piece (not shown) on the rear component 500 can include a second rear coupler (not shown), such as a hook and loop coupler, configured to be received by the second front mating piece (not shown) and can include an optional second rear housing (not shown). The second rear mating piece (not shown) can also include a second slot 533 for receiving a second fastening hook and loop strip 534.

[0146] The slots 523, 533 may be sized to receive hook-and-loop strips. The securing hook-and-loop strips 524, 534 may be integral with the rear fitting 520, such as by molding, or otherwise permanently attached to the rear fitting 520, such as by sonic welding, sewing, clamping, or gluing. The term "permanent attachment" is not intended to be absolutely permanent, but rather to distinguish attachments that are relatively more difficult to attach and reattach.

[0147] In some aspects, the fixing hook and loop straps 524, 534 are configured so that each of them can pass through a portion of the back panel 503, such as through the slots 504a, 504b, and can be attached to itself. In some aspects, when in use, a medical professional can attach the rear fitting 520 to the corresponding front fitting 510 and adjust the fixing hook and loop straps 524, 534 to fit the user's neck circumference. Once the circumference is specified, the fixing hook and loop straps 524, 534 (and other straps (if present)) will not be adjusted. Therefore, in order to take off the cervical collar, the patient detaches the rear fitting 520 from the front component. In order to wear the cervical collar, the patient reattaches the rear fitting 520 without adjusting the strap length.

[0148] In some aspects, the first rear mating piece 520 may further include a first removable hook-and-loop strip 525 that can be attached to the distal end of the first fixed hook-and-loop strip 524 to extend the length of the strip to accommodate larger necks. Similarly, the second rear mating piece (not shown) may further include a second removable hook-and-loop strip (not shown) that can be attached to the distal end of the second fixed hook-and-loop strip 534 (not shown) to extend the length of the strip to accommodate larger necks. If present, the removable hook-and-loop strip 525 may be removed to accommodate smaller necks.

[0149] In some aspects, the first rear mating piece 520 can also include a first intermediate removable hook and loop strip (not shown) that can be attached to the distal end of the first removable hook and loop strip 525 and / or the first fixed hook and loop strip 524 to extend the length of the strip to accommodate larger necks or provide versatility in length. Similarly, the second rear mating piece (not shown) can also include a second intermediate removable hook and loop strip (not shown) that can be attached to the distal end of the second removable hook and loop strip and / or the second fixed hook and loop strip 534 to extend the length of the strip to accommodate larger necks or provide versatility in length.

[0150] A radiolucent modular strapping system without a back panel is also contemplated. In some aspects, the modular strapping system can include a front mating piece 510 and a rear mating piece 520, a fixed hook and loop strap 524, a removable hook and loop strap 525, and / or an intermediate removable hook and loop strap. The strapping system can be used with conventional cervical collar components, wherein the front mating piece 510, in some aspects, can include a modified coupler (such as an adhesive or bonding material) for coupling to the front component. The modular strapping system can include two identical front and rear mating pieces for attachment to each lateral side of the front component.

[0151] The fixed hook and loop strips 524, 534, the removable hook and loop strip 525, the middle removable hook and loop strip, and other strips herein can each have a length of about 4 inches to 9 inches and can accommodate a total length of about 4 inches to 9 inches when used alone or in various combinations. The fixed hook and loop strips 524, 534, the removable hook and loop strip 525, the middle removable hook and loop strip, and other strips herein can each have a width of about 1 inch to 2 inches.

[0152] In another embodiment of the strapping and attachment mechanism, a cam surface assembly can be rotated in one direction, wherein the cam pulls the strap along the cam groove. When rotated in the other direction, the strap is released and the cam assembly can be removed. Thus, the rear component can be removed and reattached without disturbing the circumferential dimensions adapted by the medical professional as described herein.

[0153] refer to Figures 21 to 22 , an embodiment of a cervical collar can include a front component 100 coupled to a rear component 500 using conventional hook and loop straps 525 that are removably attached to a back panel 503 through slots therein (such as 504a, 504b). In this and other embodiments, modular straps also described herein (e.g., FIG. 23 ) having removable strap portions 525 can also be used.

[0154] The first cam surface assembly 600 can include a first cam actuator 601 and a first follower 611 that engages with a first cam groove 605 in a first cam surface bracket 604. The first cam surface bracket 604 has a first post 602 that is received through an opening (not shown) of the first cam actuator 601 to form the first cam surface assembly 600. The first cam surface bracket 604 can have a first keyhole post (not shown) on the side opposite the first post 602. In some aspects, the first keyhole post (not shown) can engage with a first keyhole 610 on the front component 100.

[0155] Similarly, if two cam surface assemblies 600 are present on both lateral sides of a cervical collar to facilitate ambidextrous use, the second cam surface assembly (not shown) may include a second cam actuator (not shown) and a second cam follower 631 (not shown) that engages with a second cam groove (not shown) on a second cam surface bracket (not shown). The second cam surface bracket (not shown) may have a second post (not shown) that is received by an opening in the second cam actuator (not shown) to form the second cam surface assembly (not shown). The second cam surface bracket (not shown) opposite the side having the second post (not shown) may have a second keyhole post (not shown). In some aspects, the second keyhole post (not shown) may engage with a second keyhole (not shown) on the front component 100.

[0156] In some aspects, couplers other than posts and keyholes are also contemplated. For example, each of the cam surface brackets 604 can have a base with cam followers 611, 631 that can be bonded to the front member, such as using adhesive or hook and loop material. Additionally, the base for the cam surface brackets 604 can be welded or molded onto or into the front member.

[0157] In some aspects, located between the first cam actuator 601 and the first cam surface bracket 604 can be a first freely rotating strap retainer 606 having a first opening 607 that allows the cam actuator 601 to engage the first post 602 on the cam surface bracket 604 and allows the strap retainer 606 to traverse linearly when the first cam actuator 601 is rotated by a user. In some aspects, the first rotating strap retainer 606 can include a first slot 608 for receiving the hook and loop strap 525.

[0158] Likewise, if there are two cam surface assemblies 600, located between the second cam actuator and the second cam surface bracket may be a second freely rotating strap retainer 606 having a second opening 627 that allows the second cam actuator to engage the second post on the second cam surface bracket and allows the strap retainer 626 to traverse linearly when the second cam actuator is rotated by the user (second cam assembly not shown.)

[0159] In some aspects, the second rotated strap holder 626 may include a second slot 608 for receiving the other end of the hook and loop strap 525 or a different hook and loop strap, such as the modular straps described herein ( Figures 21 to 22 not shown).

[0160] In some aspects, the hook and loop straps 525 are configured so that each can be passed through a portion of the back panel 503, such as through the slots 504a, 504b, and attached to itself. Once the circumference is specified, the fixed hook and loop straps 525 (and other straps (if present), such as straps with a modular strapping system) are not adjusted. In some aspects, when in use, a medical professional can adapt the patient's neck circumference with the cam surface assembly 600 in a tightened position by adjusting either end of the hook and loop straps 525 (or tightening both, if both are present). The either end has been pulled onto itself through the slot 608 and the slot on the front component. When the patient is ready to remove the cervical collar, the cam actuator 601 can be released, the keyhole post can be removed from the keyhole 610, and the back assembly 500 can be connected to the front component 100 without disturbing the strap placement made to accommodate the unique neck circumference set by the medical professional. To refit, the patient may engage the keyhole post with the keyhole 610 on the front piece 100 and tighten to achieve the fit originally provided by the medical professional.

[0161] The rotational movement of the cam actuator 601 tightens the strap slightly in a linear manner, such as by about 1 / 4 inch to 1 inch or about 1 / 2 inch. In some aspects, the cam rotation can be about 270 degrees to pull about 1 / 2 inch, and the cam actuator 601 can be manufactured to accommodate different tightening lengths and rotations. In some aspects, the cam actuator 601 is tightened by rotating it forward to tighten it (and backward to loosen it), although it can be configured so that it can tighten and loosen in opposite directions.

[0162] refer to Figure 25 to Figure 2 8. Embodiments of the cervical collar may include a strap alignment mechanism that facilitates attachment of the rear component 500 to the front component 100. For example, in some aspects, the cervical collar may include two lateral strap alignment mechanisms comprising straps 701, 711 that loop through a plurality of slots 504 in the rear panel 503 of the rear component 500. In some aspects, the strap alignment mechanism allows a medical professional to adjust the circumference of the cervical collar to accommodate a user with a specific neck circumference, while allowing the cervical collar to be removed by the patient, for example, in a home setting, and providing alignment marks so that when re-donned, the collar can be aligned to the same circumferential configuration in a reproducible manner.

[0163] In some aspects, a first circle marking 702 for aligning the strap alignment mechanism can be found on the first lateral body portion 184 of the front component 100, corresponding to the strap marking 703 on the first strap 701. In some aspects, for example, the loop portion on the first strap 701 is secured to the first hook portion 708 on the first lateral body portion 184 of the front component 100, or vice versa. The first circle marking 702 on the first lateral body portion 184 of the front component 100 can be aligned with the first strap marking 703 on the first strap 701, allowing for reproducible neck circumference alignment. Similarly, on the other side of the circle, a second circle marking for aligning the strap alignment mechanism can be found on the second lateral body portion 194 of the front component 100, pairing with the second strap marking (not shown) on the second strap 711. In some aspects, for example, the loop portion on the second strap 711 is secured to the second hook portion (not shown) on the second lateral body portion 194 of the front component 100, or vice versa. The second loop marking (not shown) on the second lateral body portion 194 of the front component 100 can be aligned with the second strap marking (not shown) on the second strap 711 so that the neck circumference can be aligned in a reproducible manner.

[0164] The edges of the loop ends near the front ends 705, 715 may include hardened areas that may be made by melting the loop material to form finger grips 704 so that the ends may be easily grasped by a user to remove the collar.

[0165] At the first rear end portion 706 of the strap 701, the hook material on one end can be connected to the loop material on the first strap 701 to create a fastening area near the back panel 503 of the rear component 500 when connected to the back panel 503. Thus, when the hook material is looped through the slot 504 on the rear component 500 of the collar, the hook material of the first strap 701 can fold over itself to join the loop material on the same first strap 701.

[0166] Likewise, on the other side (the second rear end portion 716 of the second strap 711), the hook material on one end can be connected to the loop material on the second strap 711 to create a fastening area near the back panel 503 of the rear component 500 when connected to the back panel 503. Thus, the hook material of the first strap 711 can fold over upon itself to engage the loop material on the same second strap 711 when the hook material is looped through the slot 504 on the rear component 500 of the collar.

[0167] The medical professional can make a coarse adjustment to the circumference of the back panel 503 near the rear component 500 by adjusting the hook portion of each of the straps 701, 711 over the loop portion on each of the straps 701, 711. The straps may include size markings 707, such as numbers ( Figures 25 to 26 ) or dot ( Figure 27 ), the size mark 707 allows the prescription to be written (such as size "3", as Figures 25 to 26 ), which facilitates the medical professional or user to roughly adjust the circumference of the cervical collar to the prescribed position.

[0168] The strips herein (such as 701, 711) can comprise loop materials, and the mating portions on the lateral main body portions 184, 194 of the front component 100 can comprise hook materials, or vice versa, as long as both parties cooperate. Conceive other couplers, such as snaps, buckles, and other complementary couplers. The strips herein (such as 701, 711) can be used together with modular strips (such as the removable strip portion 525 that can be described herein). The strips herein (such as 701, 711) can be used together with modular strips (such as the removable strip portion 525 (Figure 23) that can be described herein).

[0169] The slots 504 on the rear component may be of dimensions to receive connectors such as hook and loop strips 701 , 711 .

[0170] The front component 100 may include a housing or mechanism enclosure 111 ( Figure 29 ), the housing or mechanism enclosure 111 can include an external fitting or knob 476. In some aspects, the housing 111 can include an opening 477 for receiving an internal knob or drive gear 470.

[0171] The components herein (such as the front component 100, the rear component 500, the housing or mechanism enclosure 111, the integral housing 110, the screw mechanism, the locking mechanism, the four-bar adjustment mechanism, the rear mating piece 520, the cam surface assembly 600, and / or portions thereof) have suitable properties, such as fatigue properties and / or plastic deformation points suitable for the purpose of the cervical collar. In some aspects, the components or portions can be made of a material including a substantially rigid material or a semi-rigid material and made of a radiolucent material. Such materials include, for example, injection molded and can include, for example, acrylonitrile butadiene styrene (ABS), polyester, copolyester, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyoxymethylene (POM), styrene acrylonitrile copolymer (SAN)), polycarbonate (PC), copolycarbonate, polycarbonate blends (i.e., PC and (ABS, polyester, copolyester, SAN, PET, PBT, POM, and / or SAN)), or other blends thereof.

[0172] In some aspects, the components herein (such as the front component 100, the rear component 500, the integral housing 110, the rear mating piece 520, the cam surface assembly 600, or portions thereof) can be overmolded to provide a soft touch or pressure finger using natural or synthetic polyisoprene, polybutadiene, chloroprene rubber (CR), polychloroprene, butyl rubber (a copolymer of isobutylene and isoprene, IIR), halogenated butyl rubber, styrene butadiene rubber (a copolymer of styrene and butadiene, SBR)), nitrile rubber (a copolymer of butadiene and acrylonitrile, NBR), hydrogenated butyl rubber, styrene butadiene rubber (a copolymer of styrene and butadiene, SBR)), nitrile rubber (a copolymer of butadiene and acrylonitrile, NBR), hydrogenated butyl rubber, styrene butadiene rubber (styrene butadiene rubber, SBR), ... Nitrile rubber (HNBR), EPM (ethylene propylene diene rubber, a copolymer of ethylene and propylene), EPDM rubber (ethylene propylene diene monomer, a terpolymer of ethylene, propylene and diene components), epichlorohydrin rubber (ECO), polyacrylic rubber (ACM, ABR), silicone rubber (SI, Q, VMQ), fluorosilicone rubber (FVMQ), fluoroelastomers (FKM and FEPM), perfluoroelastomer monomer (FFKM), polyether block amide (PEBA), chlorosulfonated polyethylene (CSM), ethylene vinyl acetate (EVA) and / or thermoplastic elastomer (TPE). In some aspects, the front component 100, the rear component 500 and / or the four-bar adjustment mechanism or portions thereof can be made of a more rigid version of the overmolding materials listed above.

[0173] In some aspects, the height adjustment mechanism 200 does not include a gear mechanism. In some aspects, the single adjustment mechanism 200 does not include a rack and pinion, wherein the rack mates with the pinion. In some aspects, the single adjustment mechanism 200 does not include a cable or pulley. In some aspects, the chin portion and the main body portion are not pivotally coupled. In some aspects, the chin portion and the main body portion are not supported solely on the ends of the chin portion and the main body portion. In some aspects, the chin portion cannot flex to adapt to the user's chin contour during use and is therefore sufficiently rigid, rigid, or semi-rigid to prevent the chin contour of different users from changing the shape of the chin portion during use. In some aspects, the chin piece can be sufficiently semi-rigid and flexible so that it can maintain its approximately initial shape before and after the ring is worn, regardless of the chin contour of different users.

[0174] The adjustable front component 100 can be adjusted, such as by slots 504 (see Figures 28 to 29) proximate the distal ends of the lateral chin portions 135, 145 and / or the lateral body portions 184, 194. Figure 29 ) is coupled to the rear member to form a cervical collar with a coupler, and hook and loop straps can be secured through these slots 504.

[0175] Any of the front components 100 herein can be coupled to any suitable rear component, such as rear component 500, to form a collar with a coupler such as hook and loop material attached to the lateral body portion 184, and / or coupled to any suitable rear component through slots 504 on rear component 500, and / or through slots near the ends of the front component 100, such as near the deformed portions 160, 161 ( Figures 1 to 5 , slots not shown)) are coupled to any suitable rear component through which the hook and loop straps may be secured.

[0176] In addition to the components herein, additional parts are contemplated, such as foam 112 ( Figure 28B and Figure 29 ) and / or slots 504 for receiving straps for attaching components to form a cervical collar.

[0177] As used herein, portion may refer to a portion of the unitary housing, if present, a portion of the cervical collar or a portion of a component.

[0178] As used herein, the terms "approximately," "about," and "substantially" refer to an amount or configuration that is close to a stated amount or configuration and still performs a desired function or achieves a desired result. For example, the terms "approximately," "about," and "substantially" may refer to an amount that is less than 10%, less than 5%, less than 1%, less than 0.1%, and 0.01% of the stated amount.

[0179] All documents cited herein are incorporated by reference into this application.

Claims

1. A cervical collar comprising: Front part, including: Main body; a chin portion movably coupled to the body portion; and an adjustment mechanism configured to substantially vertically raise and lower the chin portion, wherein a single adjustment of the adjustment mechanism raises and lowers both lateral sides of the chin portion relative to the main body portion; The adjustment mechanism includes: a first threaded rod adjustably engaged with the chin portion and located laterally on a first side of the body portion; a first gear, configured to drive the first screw; a second threaded rod adjustably engaged with the chin portion and located laterally on a second side of the body portion; a second gear configured to drive the second lead screw; and an adjustment knob coupled to a drive gear meshing with the first gear and the second gear, so that rotation of the adjustment knob causes rotation of the drive gear, which causes rotation of the first gear and the second gear, which drives rotation of the first lead screw and the second lead screw, thereby raising or lowering the chin portion.

2. The cervical collar according to claim 1, wherein the adjustment mechanism does not include a rack that cooperates with the pinion; wherein the adjustment mechanism does not include cables and / or pulleys; wherein the chin portion and the main body portion are not supported solely on ends of the chin portion and the main body portion; and The chin portion is not able to flex to fit the jaw contour of a user when in use.

3. The cervical collar according to claim 1, wherein the adjustment mechanism comprises a four-rod adjustment mechanism, and the four-rod adjustment mechanism comprises a first pair of cross bars and a second pair of cross bars; wherein the first lead screw is rotationally coupled to a first shuttle and the second lead screw is rotationally coupled to a second shuttle; wherein the first shuttle is coupled to a first end of a first actuator rod and the second shuttle is coupled to a first end of a second actuator rod; wherein the second end of the first actuator rod is coupled to the first end of a first crossbar of the first pair of crossbars, and the second end of the second actuator rod is coupled to the first end of a first crossbar of the second pair of crossbars; and Wherein the first gear and the second gear each include a corresponding bevel gear engaged with the drive gear.

4. The cervical collar according to claim 3, wherein the chin portion includes a first side-down chin portion and a second side-down chin portion, each side-down chin portion defining an elongated slot therein; wherein the body portion includes a first lateral body portion and a second lateral body portion, each lateral body portion defining an elongated slot therein; wherein the coupled second end of each actuator rod is configured to straddle the elongated slot in each of the first and second lateral body portions; wherein the first end of the second crossbar of each of the first pair of crossbars and the second pair of crossbars is configured to straddle the elongated slot in each of the first side-down chin portion and the second side-down chin portion; wherein the second end of the second crossbar of each of the first pair of crossbars and the second pair of crossbars is rotatably coupled to each of the first and second lateral body portions in a rest position; as well as Wherein the second end of the first crossbar of each of the first and second pairs of crossbars is rotatably coupled to each of the first and second chin-down portions in a fixed position.

5. The cervical collar according to claim 4, The body portion includes markings indicating the height of the chin portion.

6. The cervical collar according to claim 1, further comprising: rear components, including a strip with size markings and a back panel; wherein the strip has a first end and a second end; wherein the size mark is located between the first end and the second end; wherein the strip has an alignment mark proximate to the first end; wherein the strap is removably coupled to the front member; wherein the second end of the strap is removably coupled to the back panel and to itself; as well as wherein the alignment of the edge of the second end of the strip corresponds to one of the size markings when coupled to itself.

7. The cervical collar of claim 6, wherein the rear component further comprises a second strap.

8. The cervical collar of claim 1 , further comprising a rear component having a back panel comprising: a rear mating member having a coupler proximate a first end and a strip proximate a second end; wherein the strip is coupled to the back panel; is configured so that the strap can be adjusted to a length that fits the patient's neck circumference, and Arrangements are made so that the rear fitting can be removed from the collar without disturbing said strap of said length.

9. The cervical collar of claim 8, wherein the rear component further comprises a front engagement piece for receiving the rear engagement piece.

10. The cervical collar of claim 8, wherein the rear fitting is removably coupled to the back panel.

11. The cervical collar of claim 8, wherein the strap is permanently attached to the rear fitting.

12. The cervical collar of claim 8, wherein the rear component further comprises a removable extension strap.

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